As a child, Izuku greatly admired heroes and dreamed of being a hero like his idol, All Might, once he got his Quirk. However, by the time children his age manifested their powers, Izuku still showed no signs of developing any special abilities. Due to that, his mother took him to a doctor from whom he received the terrible news that he has two joints on his pinky toe which meant he would never have a Quirk. Later on, Izuku kept watching videos of All Might that night on his computer and tearfully asked his mother if he could still become a hero. She hugged him and apologized, words that Izuku would remember as not what he wanted to hear because they made him feel inadequate to those with Quirks.
Even so, Izuku still kept aiming to be a hero and to get into U.A. High School. This ambition led him to be constantly bullied and ridiculed by his childhood friend, Katsuki Bakugo and his classmates, who believed it was impossible for someone without a Quirk to ever become a hero. Despite this, Izuku still considered the two of them to be friends at the time, always following him around. However, things escalated when Izuku tried to help Katsuki after he fell off a small bridge into a stream. Izuku offered a helping hand, but Katsuki's pride caused him to take this an insult. He believed that Izuku made him appear as if he needed aid from someone who is beneath him. This would strain the relationship between the two for years to come.
Izuku is attending class at Aldera Junior High while his teacher announces that all students will graduate this year. Katsuki replies that he is not like the other class members, calling them all fodder and that only he is destined to attend U.A. , and he alone will surpass All Might. Once his teacher announces that Izuku is attempting to get into U.A. as well, Katsuki is shocked and furious. He berates Izuku and uses his Explosion Quirk to scare him, claiming that someone who is Quirkless cannot get into U.A. and cannot do anything at all.
After class, Katsuki takes Izuku's hero notebook, burns it and tosses it out the window. Katsuki tells Izuku that Heroes have had stories about them since their early school years, that only he is destined to reach that school and Izuku is just a stepping stone for his greatness. Before leaving class, Katsuki warns Izuku not to apply to U.A. at all. Izuku leaves the classroom to retrieve his notebook and recollects about how he started dreaming about being a hero as well as how he found out about his Quirklessness.
The same day, while walking home,a villain fleeing the scene of a crime encounters Izuku. The villain had apparently escaped All Might earlier in the day. The villain decided that to avoid detection, he should take over Izuku's body. Just as Izuku fell into despair, All Might showed up and saved him. Stunned, Izuku asked for an autograph, but finds All Might left it for him before he could ask the questions he had on his mind. In an effort to get All Might to stay, Izuku latched on to All Might's leg and hanged on while he launched himself into the air. After a brief struggle, All Might agreed with Izuku that he would die if he had let go and they soon landed safely on a rooftop. Where Izuku asked if he could become a hero without an individuality. Telling All Might that he always wanted to be a hero and save people.
Suddenly, All Might's appearance drastically changes to a more skeletric form. All Might reveals to the shocked young man that he was injured in a battle five years ago and can only stay in his hero form for a short period of time. He goes on to tell Izuku that professionals must always put their lives at stake to save the day and thus cannot openly say whether it is possible to be a Hero without a Quirk as it may not be possible. All Might says that if Izuku cares about saving people, he can always go on to become a policeman, as in that way he can be responsible for putting the villains in jail (even though it is ridiculing job). He tells Izuku that it is not bad to dream, but warns him not to obscure the facts and then leaves.
Devastated at the words of his idol, Izuku starts reconsidering his dream of becoming a hero. His thoughts are interrupted as he gets near the scene of a villain attack. Izuku recognizes Katsuki as the victim being possessed by the Sludge Villain that had attacked him earlier and feels guilty that he might have accidentally let the villain escape from All Might's possession. Izuku, having looked at Katsuki's pleading eyes, rushes towards the villain, attempting to save Katsuki despite his Quirklessness. As the Sludge Villain prepares to attack Izuku, All Might, inspired by the boy's action, shows up and defeats the villain before Izuku could get hurt.
The Pro Heroes at the scene started berating Izuku for his reckless behavior. Katsuki became so mad that he was nearly saved by Izuku, that he caught up to him and told him that he was not saved by him at all before angrily walking away. All Might appeared and thanked Izuku for reminding him what it means to be a hero and then explained that what he did was what most top heroes did in their younger days, this made him tell Izuku that he can become a hero as he offered him the chance to become one.
All Might tells Izuku he is worthy to inherit his strength and that he has the power to transfer his Quirk to people, to the Izuku's shock. All Might then begins to train him at the Dagobah Municipal Beach Park by moving large pieces of garbage around, such as trucks, large office drawers, various craters, and bookshelves. He explains Izuku has to train his body to be strong enough to withstand the power of his Quirk otherwise it can result in Izuku losing limbs. After 10 months of intense training, the day of the entrance exam arrives. At six o'clock in the morning, at the last possible second, Izuku moves the final piece of garbage of the entire beach. All Might is amazed as Izuku cleaned the whole beach and commends him as he cuts off a piece of his hair and gives it to Izuku, who is surprised he has to eat it, receiving his first dose, a very small piece of One For All. However, because the entrance exam is so close, Izuku must hurry to the school without getting used to the power.
Izuku arrives at U.A. for the Entrance Exam, excited that he will be able to have a chance at becoming a hero. As he runs forward and trips, Izuku is saved by a girl's Quirk. The girl says she is nervous and asks if he is as well, to which he replies with a nod. The girl wishes him good luck while Izuku stands there awestruck, having talked to a girl for the first time in his life, even though he actually did not talk to her. Later, during Present Mic's presentation of the exam, Izuku gets called out by Tenya Iida for his endless mumbling, which he considers improper behavior.
As the practical exam is about to start, Izuku gets intimidated by Tenya once again, this time for acting suspicious towards the girl he met before. Tenya berates Izuku which garners attention from the applicants who mumble to themselves how Izuku resembled a failure for his behavior.
During the practical test, Izuku tries to destroy a 1-point robot, but finds himself too afraid to even move. Yuga Aoyama appears and destroys the robot. Izuku realizes that he is running out of time. Suddenly, a huge 0-point robot appears and begins destroying the area. Izuku tried to run away but then he sees the same girl who helped him before on the ground about to be attacked by the 0-point robot. Seeing her in danger, Izuku mustered up the courage to fight the robot and for the first time, uses One For All and attacks the huge robot with a devastating punch which completely destroys it and saves the life of the girl, while shocking everyone else with his feat.
However, Izuku's bones immediately break due to having never used it before and begins falling. He tries to use Detroit Smash to land safely, but before he could activate it, the girl, whose life Izuku saved, uses her Quirk to allow him to land safely. The practical test is declared over, much to Izuku's sadness as he did not get a single point before he passes out from exhaustion. While unconscious Izuku is called amazing for taking down the giant robot by his peers who wonder if he was intentionally looking weak, with only Tenya noting how Izuku selflessly protected the girl. Luckily for Izuku, Recovery Girl then heals his heavy injuries almost instantly.
One week later, Izuku receives a letter that will determine whether he was accepted into U.A. or not. Izuku opens the letter in his room and a screen with All Might on it appears. He apologizes for not contacting Izuku earlier and informs him that he will be working as a teacher at U.A. All Might tells him that he did fine on the written test, but that he scored zero points during the practical test. Izuku took this, and prematurely assumed he failed. However, All Might tells him that because of his heroic actions during the practical test, he earned 60 rescue points from teachers, meaning he has passed and therefore being accepted into U.A., much to Izuku's joy and happiness.
Izuku, now a student of U.A., talks with his mother before leaving home to his first day at the university. As he arrives at Class 1-A, Izuku hopes not to see either Katsuki or Tenya again, as he enters the classroom. He finds his fears realized as he witnesses both Katsuki and Tenya arguing with each other, much to his frustration. Tenya approaches Izuku apologizing for his treatment and congratulates him on his feat during the Entrance Exam. Right after, Ochaco arrives at the classroom, with her cheerfulness embarrassing Izuku. While observing the scene, Katsuki recollects about a skirmish he had with Izuku about the results of the Entrance Exam, with the latter managing to show courage against his longtime bully after being threatened. This is followed by the homeroom teacher, Shota Aizawa, coming into the classroom and explaining to the students about the Quirk Apprehension Test that they must go through.
Shota further explains that whoever gets last place in the test will be expelled from U.A. High, putting massive pressure on Izuku. The students are tested on the power and use of their Quirks through several exercises under Shota's observation, but because of his lack of control over One For All, Izuku is unable to use it in most of the trials, which leads to him performing below the standards set by his classmates. When the time comes for the ball pitch trial, Izuku, left with no choice, tries to throw a ball as far as he can using One For All, but Aizawa stops him by erasing the Quirk. Izuku recognizes him by his goggles and powers as the hero Eraser Head. Shota tells the student that, with a Quirk like One For All, Izuku will be nothing but a burden by putting himself in danger several times, and that if he does not find a way to prevent One For All from massively crippling his own body, Izuku's future as a hero will be put in jeopardy. Shota then allows Izuku a second chance for the pitch trial. Keeping Shota's words in mind, Izuku powers up only the end of one his fingers and launches the ball at a considerable distance. He shocks his class with this display as he tells his teacher he is still standing as Shota is impressed with his feat.
Dumbfounded by this new development, an angry Katsuki menacingly rushes towards a nervous Izuku in order to question him about his sudden Quirk, but Shota stops him with his Capturing Weapon before a conflict can start. Izuku, because of his broken finger, underperforms through the remaining tests, eventually getting last place. However, after showing the results of the test, Shota reveals that he lied about the expelling in order to motivate the students to give their all, calling it a logical ruse, much to Izuku's shock. While Shota is leaving, he sees All Might, who tells Shota that he knows that he was actually planning to expel last place from U.A. All Might then concludes that Shota sees the same potential in Izuku that All Might sees. Shota shrugs off All Might's words, and says that the chance of Izuku becoming a great hero is higher than zero, and that he does not see anything more than that, claiming to expel Izuku if he sees his chance ever fall below that mark.
At the end of the day, Izuku is joined by Ochaco and Tenya, with the newly formed trio walking back home together, where Ochaco tells Izuku that his insulting nickname of Deku, given by Katsuki, sounds like the Japanese word for "you can do it," causing him to adopt the nickname, to Tenya's surprise. Izuku explained his views of his name has just changed.
As the Heroics class starts, All Might tells all students to wear their Hero Costumes and head to Ground Beta. Izuku reminisces about the time he had to order a costume of his own. It turned out that Izuku's mother had made the costume herself by hand after looking through some of her son's annotations, feeling guilt for previously not believing that Izuku could become a hero and promising to always cheer for him from now on. Wearing said costume proudly, Izuku stepped into the training field.
Izuku gets teamed up with Ochaco and is tasked to stop a team composed of Katsuki and Tenya from blowing up a fake nuclear bomb. They successfully infiltrate the building and look around the corners to see if anyone was coming, where Katsuki ambushes them. Izuku manages to save Ochaco from Katsuki's attack, but half of his mask is burned off in the process.
As Katsuki is about to attack him again, Izuku intercepts him, grabs his right arm and throws him to the ground, knowing that he would use his right arm to attack. Izuku tells the surprised Katsuki that he memorized his moves, as the same notebook Katsuki blew up and threw away in the past contained notes of heroes he has analyzed which include him. Izuku announces that he is no longer the "Deku" who was a loser, but the "Deku" whose vibe is never giving up, much to Katsuki's fury.
Izuku tells Ochaco to go on ahead while he fights Katsuki who tries to attack him again. Having predicted that, Izuku evades and manages to grab Katsuki's leg with the Capture Tape, but Katsuki breaks free using an Explosion. Knowing he is at a disadvantage, Izuku retreats in order to think of a plan and contacts Ochaco to learn about her location for the strategy. Katsuki searches for Izuku, angrily voicing that Izuku was intentionally hiding his Quirk from him. Eventually, Katsuki finds him and attacks Izuku with a great empowered Explosion move provided from his Grenadier Bracers. Izuku survives and calls Katsuki insane for doing that, but a seething Katsuki demands that Izuku use his Quirk.
Izuku and Katsuki continue their fight, with Katsuki overpowering him, although Izuku manages to hold his own. Izuku concludes that Katsuki is stronger than he is. Izuku decides to use his Quirk and informs Ochaco to grab onto something. Instead of hitting Katsuki, Izuku aims his Detroit Smash into the ceiling, destroying the ground of every floor above . them, including the one Ochaco and Tenya are on, but Izuku is forced to take the full brunt of Katsuki's Explosion. Although Izuku was unable to defeat Katsuki, it did distract Tenya long enough for Ochaco to grab the fake Nuclear Bomb, allowing both Izuku and Ochaco to win.
Izuku is then taken away on a stretcher to have his wound attended to by Recovery Girl. After spending most of the day having his wounds healed, Izuku returns to his classroom. As he enters, Izuku is commended by many of his classmates for his performance during the battle trial. Ochaco asks him if he is alright, to which he replies that he is fine. Izuku then asks her where Katsuki is.
Although many of his classmates try to stop him, Izuku goes to find Katsuki. After Izuku finds him leaving school, when Katsuki accuses him of coming to gloat Izuku instead tells him his secret: that he obtained his Quirk from someone else in order to convince him that he had not been deceiving him but the latter does not believe it and swore to defeat him.
Izuku is confronted by a reporter from the media, asking him questions about All Might, but Izuku makes an excuse to escape from the reporter. In class, Shota Aizawa makes a remark about Izuku's performance in the battle trial and encourages him to work harder. Afterwards, Izuku is elected as Class President after the class votes, much to his shock. In the lunch room, Izuku is unsure if he is the right one for the task, but Tenya assures Izuku that he is as he voted for him. Izuku then learns that Tenya is from a prestigious family of super heroes and that Tenya is the brother of Ingenium. As they continue talking, the siren goes off and everyone begins evacuating. After Tenya stops the chaotic evacuation, Izuku returns to class where he decides to step down as Class President and give the position to Tenya, deeming him more worthy of the position than him which is well received by everyone.
In a flashback, Izuku is seen speaking to All Might telling him that he revealed to Katsuki about the secret of the One For All Quirk. However, All Might is not angry about it since Katsuki interpreted it as nonsense and tells Izuku to continue keeping the secret to himself and no one else. In the present, Izuku changes into his gym clothes (since his Hero Costume was tattered during his battle with Katsuki in the battle trial) in preparation for the rescue trial. On the way to the U.S.J., Tsuyu compares Izuku's Quirk to All Might's, which worries him although Eijiro Kirishima dismisses Tsuyu's claim since Izuku's Quirk hurts him unlike All Might's Quirk. Izuku then watches as the rest of Class 1-A make fun of Katsuki, which contrasts to their time in Junior High. They soon arrive at the U.S.J. and listen to No. 13's speech. Izuku applauds No. 13.
Suddenly, actual villains soon attack the U.S.J. which shocks Izuku. Shota goes to hold off the villains though Izuku tried to warn him that he couldn't but is amazed to see his teacher hold his own against the villains. Tenya then gets his attention by telling him to evacuate with his class. However, he is suddenly warped away by Kurogiri to the flood area of the Ultimate Space and Jams.
Sent to the shipwreck zone, Izuku falls in the water where he was about to be attacked by a shark like villain who prepared to devour him, but Tsuyu saves him and throws him onto a boat along with Minoru. Izuku thanks her for saving him. Izuku then wonders about the villains' goal and then decides that their goal now is to fight.
Izuku says that Tsuyu was teleported (along with him and Minoru Mineta) to an area (the flood zone) that allows her to be at full strength and then deduces that the villains do not know what their Quirks are. He then says that although the villains beat them in sheer numbers and experience, the one advantage they do have is the element of surprise (their Quirks as the villains do not know about them). Izuku concocts a plan and after telling Tsuyu and Minoru, Izuku uses Delaware Smash on the water while Minoru throws his sticky substance. The spread out water converges in the center along with Minoru's sticky substance (with the villains being pulled in), causing all the villains in the water to be stuck together by Minoru's Quirk. Izuku then escapes along with Minoru and Tsuyu, with Tsuyu saying that he was impressive.
After that Izuku rambles that could have been dangerous, Tsuyu cuts him off and he says that their priority is to call for help, that they can take the waterside to the exit, but after remembering that Shota is at the central plaza fighting a large group of villains, Izuku decides that they should head to the central plaza and try to be of some assistance to Shota. However, after reaching the central plaza, Izuku is horrified to see Shota's condition after he is defeated by a monstrous villain.
Izuku is surprised to hear Tomura Shigaraki announce that they are retreating and wonders why they came for nothing. However, this train of thought is quickly interrupted as Tomura attempts to disintegrate Tsuyu but Shota uses his last bit of strength to nullify Tomura's Quirk, saving his student. Izuku then uses the opening in an attempt to save Tsuyu by attacking Tomura. He uses smash on him, but this time, Izuku does not suffer from recoil. However, the attack was intercepted by Nomu, who is not fazed as Izuku realizes Nomu is the secret weapon against All Might. Nomu grabs Izuku's arm, but Tsuyu wraps her tongue around him. Suddenly, All Might appears, much to Izuku's happiness. Izuku is then rescued by All Might along with Minoru and Tsuyu.
After seeing All Might in a bad position, Izuku decides to help him, but he is nearly warped but Kurogiri though Katsuki's attack stops him. Izuku is then joined by Shoto and they hold down Kurogiri until Nomu attacks them to save the villain but All Might protects Katsuki even Kurogiri was freed.
Izuku then watches the battle between All Might and Nomu and worries for him as he was the only person who knows about the latter's time limit.
After Nomu's defeat, Tomura and Kurogiri attempt to finish off All Might, but Izuku intervenes their attempt by running in front of All Might to protect him. Izuku's intervention gives the Heroes enough time to reach the U.S.J., forcing Tomura and Kurogiri to stop their attempt.
After Tomura and Kurogiri retreat because of the arriving heroes and No.13's attack, Izuku is seen on the ground, crying, as he was unable to do anything to help. However, All Might tells him that is not the case; because if Izuku did not intervene, he would have been dead and thanks him for saving his life. Afterwards, Izuku is taken to U.A.'s infirmary to have his injuries attended to.
The next day, Izuku listens to Shota's announcement about U.A. Sports Festival. After end of the fourth period, Izuku and Tenya listen to Ochaco's reason for becoming a heroine and her history, to which Izuku replies that with her Quirk, she would be able to build for free. After the discussion, All Might arrives asking Izuku to have lunch with him. In the resting room, Izuku tells All Might that he is adjusting to his Quirk, which pleases All Might. All Might asks Izuku to show the world at the sports festival that he is the next generation's "All Might". 
However, Izuku is unsure if he is up to the task; All Might assures Izuku that he is not forcing him and asks him to remember is feelings during his training at the beach park. During the two weeks before the sports festival, Izuku trains himself. On the day of the Sports Festival while Class 1-A prepares, Shoto Todoroki approaches Izuku, telling him that he is stronger than him and will defeat him. Izuku admits that Shoto is indeed stronger, but since everyone is giving it their all, Izuku will also give everything he has got. He then walks out to the sports festival with his head up high, stating to himself that All Might can retire.
Once the Obstacle Course Race begins, Izuku manages to get through the narrow gate while avoiding Shoto's ice. Izuku sees that there are robots in front of him and decides that now is the time to put his head to use, no longer shaking in fear unlike in the Entrance Exam. Izuku grabs a metal plate and severs a robot's head with it by using the robot's momentum. Izuku passes the Fall, but soon sees that he is far behind. Izuku gets on the metal plate and blasts himself towards the lead using the landmines he had collected.
In the lead, Izuku sees that Katsuki and Shoto are on his tail using the two as balance, Izuku slams the plate on more landmines. This launches him once more and blows dust in their eyes, stunning them. Taking advantage of this, Izuku runs ahead and crosses the finish line in first place which allowed him to advance to the second event of the Sports Festival, which is a Cavalry Battle. Izuku then finds out that he is worth 10 million points for the Cavalry Battle, because he got first place on the Race Course, which horrifies him as now he is a prime target.
Because of his value, Izuku has trouble finding teammates, but then Ochaco decides to team up with him, which makes him happy. Izuku then tries to team up with Tenya as he has great synergy with Ochaco's Quirk but he politely declines, much to Izuku's disappointment. Mei Hatsume decides to team up with Izuku as she would be recognized for being on his team, due to his rank. Izuku decides on a final team member and chooses Fumikage Tokoyami.
The event begins and Izuku's team is attacked by Team Tetsutetsu and Team Hagakure but thanks to Mei's gadgets and Fumikage's Dark Shadow, they manage to thwart their attacks. The team takes to the air, but they are suddenly attacked by Katsuki. Fumikage uses his Dark Shadow to block Katsuki's attack and the team lands on the ground. Izuku says that they should have an easier time now, but takes those words back when they are confronted by Shoto and his team.
Denki unleashes a large amount of electricity which Fumikage's Dark Shadow protects them from. Izuku and Shoto's team battle with neither team having the advantage. In a surprise twist, Tenya uses his Recipro Burst, allowing Shoto to take his 10 million headband in an instant, shocking Izuku. Izuku becomes distressed but thanks to Ochaco's encouragement, Izuku remembers that his teammates fates are in his hands and decides to attack Shoto with One For All as a symbol of their unity.
Izuku uses One For All to blow wind pressure at Shoto which distracts Shoto and allows Izuku to take a headband. However, Izuku took the wrong headband and his team fights Shoto's team for the last ten seconds. The event ends and Izuku becomes depressed. Fumikage reveals that he took a 615-point headband during Izuku's scuffle with Shoto which allows his team to move on to the last event. with Izuku crying in happiness. After the lunch break begins, Izuku is seen with Shoto in private in a hallway, with Izuku asking what is it that he wanted to talk about.
Shoto asks whether Izuku is an illegitimate child of All Might or not, but Izuku states that is not the case. Shoto then tells Izuku about him; that he was conceived from a Quirk Marriage so that his father, Endeavor could raise him to be a hero that surpasses All Might; in the past, his mother threw boiling water on him because she despised his left side and that he will surpass Izuku without using his fire power as a way of disavowal-ling his father. Shoto's story leaves Izuku shocked and speechless. Although their goals are different with his goal being trifling compared to Shoto's, Izuku says he cannot let down the people who have helped him get so far and declares that he will defeat Shoto.
The final event is a tournament event and Izuku's opponent in the first round is Hitoshi Shinso. When Hitoshi approaches Izuku, Mashirao Ojiro warns Izuku not to respond to his provocations. During the recreational events, Mashirao gives Izuku advise on Hitoshi's Quirk. Before the first fight begins, All Might goes to see Izuku and advises him to smile in the face of anxiety and fear. A confident Izuku steps out to the ring to confront Hitoshi. After Hitoshi calls Mashirao an idiot for throwing away the opportunity to participate in the tournament, the fight begins and Izuku, who is angered by Hitoshi's insults, attacks him, but mysteriously stops moving.
Izuku finds himself to be completely immobile, but when Hitoshi orders him to go out of bounds and starts walking towards the exit of the ring. Still conscious, he tries to stop himself but finds that his body is moving on its own. As Izuku is about to reach the out of bounds of the ring, he has a hallucination and sees eight shadowy figures which causes Izuku to attack himself with One For All, allowing him to break free of Hitoshi's control. Izuku hypothesizes that the people he saw were those who had One For All before him. Izuku ignores Hitoshi's provocations and attacks him. After a brief struggle, Izuku throws Hitoshi over his shoulder and rings out Hitoshi, causing Izuku to move on to the second round.
Immediately afterwards, Izuku asks Hitoshi about his goal, to which Hitoshi states that he wants to end the discrimination against his Quirk by entering the Heroics Department and becoming a Hero. Before leaving, Hitoshi warns Izuku to be weary of him. Izuku then heads to Recovery Girl's infirmary to have his wound attended to. After his wounds are fixed, Izuku tells All Might about the shadowy figures he saw; All Might hypothesizes that the shadowy figures he saw were the imprints of people who had bared the One For All Quirk. All Might advises Izuku to go and watch the next match. Izuku sits next to Tenya and Ochaco who saved a seat for him. When Shoto freezes Hanta, creating a huge ice glacier in the process, Izuku watches in shock and horror. When Shoto unfreezes Hanta with his fire power after winning, Izuku notes that what he saw seemed immensely sad.
Izuku then watches the other matches, writing down notes on his opponents, such as counter strategies. Ochaco sees this and is impressed with him. Izuku visits Ochaco inside the waiting room and offers a strategy against Katsuki. However, Ochaco politely turns down his offer, thanking him for offering a strategy for her, claiming she will be all right and they will meet at the final match. Izuku, along with Tenya, go to their seats in the stadium to watch the match.
Tenya asks Izuku what his counter strategy for Katsuki was, to which Izuku replies that the strategy involved striking fast to gain the advantage. Izuku watches the match and becomes worried when Ochaco gets hit by Katsuki's explosions. After Ochaco collapses and is declared the loser of the match, Izuku expresses sadness.
Izuku leaves his seat and walks away. Along the way, he encounters Katsuki and congratulates him on winning his match. Katsuki accuses Izuku of giving Ochaco strategies, but Izuku denies this and boldly states that Ochaco used strategies on her own accord, much to Katsuki's anger. Izuku visits Ochaco to see if she is alright. Wanting to be by herself, Izuku leaves the room and walks to his next match. Suddenly, Izuku runs into Endeavor. Endeavor tells Izuku to give Shoto a good matchup. Before Endeavor leaves, Izuku states that he is not All Might and Shoto is not Endeavor.
The match begins and Izuku prepares to charge. Izuku manages to barely hold off Shoto's ice attacks with One For All wind pressure, but breaks two of his right hand's fingers as a result. However, Shoto is still able to close in on Izuku several times. After seeing Izuku's injuries, Shoto decides to end the match and sends a wave if ice, but Izuku sends a blast of wind pressure against Shoto's ice with his broken right hand, destroying the ice. Izuku knows of Shoto's limit and berates Shoto for only using half of his power to win while everyone else is giving it their all. Izuku clenches his broken right hand into a and orders Shoto to face him man to man.
An enraged Shoto runs toward Izuku to face him head on, but Shoto's frostbite affects him, allowing Izuku to hit Shoto with an One For All enhanced punch, knocking Shoto down onto the floor and slightly injuring him. However, Izuku is hit by Shoto's ice in the process of punching him. Shoto manages to get back up and launches another wave of ice but Izuku uses One For All's wind pressure to shatter the ice with ease. The battle becomes easier for Izuku due to Shoto's frostbite weakening him. Shoto wonders why Izuku is going so far, to which Izuku replies that he wants to thank the people for helping him get so far and wants to be a super cool Hero like All Might. Izuku once again berates Shoto for using only half of his power and mocks Shoto's disowning goal. Izuku hits Shoto again. After Shoto gets back up, Izuku tells Shoto that the fire power he has is his power and not his father's. Shoto, moved by Izuku's words, activates his fire power and states to Izuku that he too will become a hero, causing Izuku to crack a smile, happy to see his opponent finally giving it his all like himself.
Izuku and Shoto power up for one final clash. Izuku's wind pressure and Shoto's heat blast create a huge shockwave. After the smoke clears, Shoto is still in the ring but Izuku is out of the ring. Izuku's grievous injuries makes him fall to the ground. Thus, Izuku is eliminated from the tournament event. Inside Recovery Girl's room, Izuku asks All Might for his forgiveness since all he wanted to do was help Shoto overcome his misery. All Might tells Izuku that his match was simply an unfortunate outcome but praises Izuku for helping Shoto with his problem, saying that reaching out and helping people with their personal problems is one of the principal qualities of being a Hero, happy that Izuku has such a quality.
Izuku receives surgery from Recovery Girl, which heals his wounds. After the surgery, she warns Izuku to not abuse his Quirk again. Izuku leaves Recovery Girl's room with All Might and they walk down the corridor. Izuku admits to All Might that someone else is better deserving of One For All than him. However, All Might reveals that he too was Quirkless, surprising Izuku. All Might encourages Izuku by saying that only he can truly shine with One For All. Izuku goes to the stadium where Katsuki and Eijiro are battling. Izuku talks with Tenya who tells Izuku about his fight with Ibara and how he won. After Katsuki defeats Eijiro, Tenya leaves for his fight. After watching the fight, he becomes saddened that Tenya lost.
Izuku, along with Ochaco and Tenya, watches the match between Fumikage and Katsuki. Izuku notes that if Katsuki did not find out about Fumikage's weakness, Fumikage would stand a better chance at winning. After the match between Fumikage and Katsuki ends, Izuku wonders how the match between Katsuki and Shoto will turn out.
Both Izuku and Ochaco agree with Tenya about watching the final match closely for revenge later. Izuku watches the final match between Katsuki and Shoto. During the match, Izuku yells at Shoto to keep fighting.
Izuku watches the closing ceremony of U.A.'s Sports Festival. Tenya told him about what happened to his brother and that he had to leave the sports festival; Izuku wishes for Tenya to be safe. After the sports festival is finished, the next day at his home during breakfast, Izuku and his mother talk to each other with Izuku saying that she almost had a rougher time than she did. Izuku's mother is happy about Izuku's Quirk although she is at unease about its risky recoil but nevertheless she will keep cheering Izuku on. Izuku decides that he must find a way to control One For All properly. Izuku's mother asks if he wants to watch a recording of U.A.'s sports festival, to which Izuku replies that he will later on.
Two days after the sports festival, Izuku is on a train to U.A. While on the train, some of the passengers recognize him from the sports festival, acknowledging his prowess. At U.A., Tenya is running and passes by Izuku, telling him that they should be at least 10 minutes earlier for school. After arriving inside, Tenya tells Izuku that he does not have to be worried about his older brother as he will be fine and apologizes for causing him unnecessary concern.
In class during the Hero Informatics period, Class 1-A must decide on Hero names. Izuku thinks of using names similar to All Might's name, but he wants to be more original and eventually picks a perfect name. Izuku is the last student to reveal his name; the class asks him if he is sure, to which Izuku replies that he did not like the name but someone came along and changed the meaning of the name, making him happy. Izuku reveals his Hero name to be "Deku". After Class 1-A is finished formulating their Hero names, Izuku is given a list of 40 work places he can choose from so that he can train from one of them.
After the class period, All Might meets Izuku and tells him of a nomination from a person called Gran Torino, the friend of All Might's predecessor. All Might advises Izuku to choose Gran Torino for his workplace training as he will be able to advise Izuku on One For All usage, thus Izuku decides to go to Gran Torino for his training. At the train station, Izuku tells Tenya if he has any problems he can talk to him and Ochaco about it, to which Tenya replies that he will. Izuku arrives at Grain Torino's address and enters his apartment. However, Izuku finds Gran Torino to seemingly be a foolish old man and prepares to leave, disappointed. Suddenly, Gran Torino jumps towards the door and reveals he was merely putting up an act as he tells Izuku that he cannot stand to see how Izuku uses his Quirk and tells him if he wants to learn more about One For All, then he should stay and put his Hero Costume on.
Seeing the man's real persona , Izuku compares it to All Might's and realizes he is indeed the latter's teacher. He accepts the man's offer to train. Izuku puts on his Hero costume (which has not only being repaired but redesigned as well). He and Gran Torino have a mock battle, but Izuku is not able to keep up with Gran Torino's speed. After the mock battle finishes, Gran Torino gives a hint about Izuku's problem with One For All; that he thinks it is special. Izuku ponders about Gran Torino's hint and realizes that Quirks are simply body functions with One For All being no different. Izuku writes this discovery down in his notebook.
During the night on his first day, Izuku steps out of Gran Torino's apartment and goes to an alley in order to test out One For All by thinking of it as a simple body function. Izuku continues his practicing until morning. At breakfast, Izuku ponders why he still cannot gain control over One For All. After a new microwave arrives and Izuku fails to cook the taiyaki properly, Izuku realizes his next problem; that he has only been using One For All in one section of his body and not letting it flow throughout his body. Izuku activates One For All throughout his body and asks Gran Torino to test him.
Izuku battles Gran Torino while One For All flows throughout his body. this time, Izuku is able to keep up with Gran Torino, but Gran Torino decides to get serious and strikes Izuku. After the battle, the elderly Hero notes to himself that Izuku has dramatically changed in such a short space of time and compliments Izuku for being able to graze him (a cut is shown on Gran Torino's face) even though he was using his own power earnestly. Gran Torino states Izuku that he must get used to using One For throughout his body and informs him that they will continue training after breakfast. After breakfast, Izuku continues his training with Gran Torino.
Izuku continues his training in gaining proper control of One For All with Gran Torino for two days. It is the third day at 5:00 PM, Izuku is on the floor injured due to his training. Gran Torino decides to end Izuku's training in One For All, not wanting Izuku to become stale due to fighting him all the time. Izuku protests but Gran Torino denies Izuku's request to continue training in One For All. Gran Torino declares that they will move on to phase two which is workplace experience. Izuku cleans himself up and puts on his Hero costume. Izuku and Gran Torino leave the apartment. Gran Torino and Izuku leave on a train for Shinjuku. The train passes Hosu. On the train, Gran Torino tells Izuku that they will be fighting villains since they appear at night. Suddenly, the train experiences an emergency stop and a Pro Hero comes crashing into the train, much to Izuku's and Gran Torino's shock.
Immediately afterward, a creature that looks similar to Nomu appears. Izuku tries to take action, but Gran Torino orders Izuku to stay put. Gran Torino jumps from his seat and slams himself into the Nomu-like creature, smashing the Nomu-like creature and himself out of the train and into the air above Hosu. Izuku goes to check on Gran Torino but sees that a part of Hosu has been set ablaze. Izuku wonders what is transpiring and starts worrying about Tenya's safety.
Izuku exits the train and starts running towards Hosu. In Hosu, Izuku witnesses the battle between the Pro Heroes and the two Nomu-like creatures. Izuku is surprised that Tenya is not at the battle and starts pondering. Izuku quickly figures out that Tenya came to Hosu to find and hunt down the Hero Killer Stain. Izuku leaves the battlefield and searches for Tenya. Izuku manages to find Tenya in an alley where he is on the ground injured and Stain is about to kill him. Izuku activates One For All throughout his body, dashes at great speed, and punches Stain in the face, preventing the Hero Killer from finishing off Tenya. Izuku announces his arrival and declares that he came to save Tenya.
Izuku asks Tenya if he can move, but Tenya tells Izuku that he is immobilized. Stain praises Izuku for his efforts and then threatens Izuku. Izuku decides that he must protect Izuku and the injured Pro Hero. Tenya tries to dissuade Izuku from fighting his battle. Izuku puts on a brave face and says that getting involved in other people's business is one of the principal qualities of a Hero, causing Stain to smile. Izuku and Stain begin their battle; Izuku activates One For All Full Cowl and briefly fights Stain. Izuku's enhanced speed manages to allow him to avoid Stain's powerful strikes and attacks Stain from above with 5% Detroit Smash. However, Izuku's move does not do anything and Stain immobilizes Izuku with his Quirk. Stain, impressed with Izuku's actions, decides to spare Izuku but prepares to kill both Tenya and the Pro Hero. Izuku yells at Stain to stop but to no avail. Suddenly, two columns of fire and ice attack Stain but he manages to avoid the attack in the nick of time. Shoto reveals himself and tells Izuku that he texted him more information than usual and came running. Izuku is surprised that Shoto showed up.
Izuku asks Shoto why he is here and is shocked that Shoto is using his fire power. Izuku watches Shoto's battle with Stain; Izuku warns Shoto to not let Stain get his blood. Stain jumps into the air and prepares to stab Shoto with his katana. Izuku realizes that he can move and activates One For All Full Cowl. Izuku, using enhanced jumping speed, appears before Stain and grabs him, attempting to throw him onto the ground. The Hero Killer retaliates by knocking Izuku away with his elbow, causing Izuku to fall onto the ground. Izuku informs Shoto that Stain's Quirk allows him to immololize people depending on blood types for a certain amount of time, earning praise from Stain. Izuku and Shoto team up. Izuku attacks but Stain easily strikes Izuku, licks his blood and immobilizes him; Izuku apologizes to Shoto.
Before Stain attacks, Tenya breaks Stain's katana and rescues Shoto; he apologizes to Izuku. As Shoto and Tenya battle Stain, Izuku is able to move again. Izuku and Tenya team up and attack Stain with their enhanced punch and kick respectively.
Stain makes one last ditch attempt to kill Tenya but Shoto attacks Stain with his fire, causing him to lose consciousness. Izuku, Tenya and Shoto remove Stain's weapons. The three along with the injured Pro Hero leave the alley with Stain in tow. Gran Torino appears and berates him for not following his orders. Tenya apologizes to Izuku, although Izuku admits that he should have been more of a friend. Suddenly, the winged Nomu appears and grabs Izuku. Suddenly, Stain awakens, frees himself and kills the winged Nomu as well as saves Izuku. Izuku is shocked at Stain's action.
After Endeavor arrives, Izuku tries to break away from Stain. Stain's bandaged mask falls off and reveals his true face, shocking Izuku. Stain walks forward and declares that the only one who is allowed to kill him is All Might, unleashing a bloody malefic aura in the process. Izuku becomes terrified and unable to move due to the fear. After Stain loses consciousness for the last time, Izuku along with Shoto and Tenya are taken to the Hosu General Hospital to have their wounds treated. The next day at Hosu General Hospital, the Chief of Hosu Police, Kenji Tsuragamae appears to talk to them. Kenji tells Izuku, Shoto and Tenya that the Hero Killer is undergoing treatment. Tsurugamae states that Izuku, Tenya and Shoto must be punished along with their mentors for not being with them. However, Tsurugamae tells them that the event that transpired with Stain will be covered up due to a limited amount of witnesses. Kenji states that Izuku along with Shoto and Tenya have a promising future and thanks them for their heroic actions.
Izuku gets a call from Ochaco who asks him about his injuries, to which Izuku states that he is fine. After the phone call, Izuku is excited at talking to a girl on the phone. Soon Tenya tells Izuku that his left hand will not work properly and has decided not to get surgery because he wants his injury to remind him of his mistake at Hosu. Tenya and Izuku resolve to become better Heroes. Izuku along with Tenya laugh with Shoto after they believed Shoto cracked a joke about people's hands going bad whenever he is around.
At the end of the week, workplace training comes to an end. Outside Gran Torino's apartment, Izuku thanks Gran Torino for looking after him; Izuku praises Gran Torino for his training as it has allowed him to become stronger. Gran Torino advises Izuku to maintain his control and composure when using One For All and to not go over the 5% limit. Izuku wonders why no one in the Hero society knows about him, to which Gran Torino states that he was never interested in the life of a Hero. Before leaving, Izuku tells Gran Torino his Hero name, making Gran Torino smile. Izuku returns to U.A. and in Class 1-A, Tenya states his resolve to become a Hero anew, Izuku smiles.
Class 1-A has Foundational Hero Studies next; All Might says that their lesson will be a rescue training race through Playing Ground Gamma (an industrial site with many densely packed lanes which makes it look like a labyrinth). Izuku, along with Mashirao, Tenya, Mina and Hanta are the first group that will be racing each other to reach All Might. The race begins; with Izuku activating One For All Full Cowl: 5% and begins leaping and running through the site with ease while outpacing the others to get the lead. All Might and a majority of Class 1-A are greatly surprised and amazed by Izuku's extraordinary movements and better control of his Quirk since they had previously counted Izuku out. As Izuku leads, Katsuki is shocked that Izuku's movements in combat have become similar to his own, angry that Izuku has improved so much.
Izuku focuses on keeping calm and his power level steady, however his foot slips from a small pipe and he falls into a painful face plant. After Hanta wins, Izuku remarks that he still has much to learn and that he will have to remember to take more care with where he jumps to. All Might approaches Izuku and is impressed with him; he asks Izuku to meet with him so that he can tell him about One For All's history.
After Foundational Hero Studies is finished, Izuku heads to the boys' locker room to change into his school uniform. While changing, Izuku wonders why All Might was so serious.
Afterwards, Izuku meets with All Might in the Break Room. All Might tells Izuku to lock the door and then apologizes to Izuku for not being at his side during the Hosu incident, to which Izuku replies that he does not have to apologize. All Might reveals that Izuku's One For All Quirk was not stolen by Stain which is because One For All can only be passed on when the user wishes it. All Might tells Izuku about One For All's origin; originally, a man who was Quirkless was given a power storing Quirk by his evil older brother whose Quirk stole and passed on Quirks. Unbeknownst to the older brother, the younger brother had a Quirk which could transfer, thus the younger brother's transfer Quirk and the power storing Quirk mutated and became One For All. However, the younger brother could not defeat his evil older brother and passed on One For All onto successors until it was strong enough to defeat his older evil brother. Eventually, One For All was passed onto All Might and he used it to defeat the evil older brother. However, the evil older brother has returned, thus Izuku will face him in battle when the time comes. All Might apologizes for giving Izuku so much information. Izuku says that whatever task All Might gives him he will accomplish no matter what as long as All Might is by his side. All Might thanks Izuku. Back in class, Shota reveals that Class 1-A will be going to a forest lodge during the summer break.
One week before the end of term test, Izuku who was ranked fourth highest encourages Denki and Mina (who failed) that they just need to do their best because he wants to go to the forest lodge with them. In the lunchroom, Izuku, Tenya, Shoto, Ochaco, Tsuyu and Toru Hagakure eat at a table, discussing how they will perform in the end of term test until Neito Monoma harasses them with his usual antagonism. After Itsuka reprimands Neito, she reveals that the exercise test is a battle simulation fighting against robots like the Entrance Exam.
Back in class, Izuku reveals the content of the exercise test to the class, much to Denki and Mina's happiness before Katsuki berates them about being excited as they have no control of their powers. Katsuki then confronts a nervous Izuku over his new use of his Quirk and states it is making him furious but declares that he will outperform him as well as Shoto before leaving in a huff.
On the day of the exercise test, Mr. Principal reveals that Class 1-A will be fighting against U.A.'s teachers in their exercise test.
Shota says that Izuku and Katsuki will be paired together, much to their shock. Izuku and Katsuki become more surprised to learn that they will be facing All Might in combat for their exercise test. All Might tells the duo to cooperate together in order to defeat him.
All Might, Izuku, and Katsuki get onto a bus and drive to an uninhabited city where the test exercise will take place. All Might, Izuku, and Katsuki arrive in the city. All Might explains the test exercise: Izuku and Katsuki have two options of winning and passing the test exercise; they must either handcuff him or one of them must escape from the battlefield. Izuku and Katsuki have to accomplish either fighting to handcuff their opponent or one of them must escape the battlefield in 30 minutes. Izuku notes that this will test their flight or fight decision skills. All Might puts on super compact weighted bracelets to give himself a handicap. The test exercise begins. However, Katsuki and Izuku are not able to agree on a plan of action and start arguing. Suddenly, All Might throws a punch which devastates the area Izuku and Katsuki are in which causes Izuku to fall down.
Izuku is shocked at the level of All Might's strength (even though he knows that All Might is handicapped and severely weakened to begin with). Katsuki attacks All Might but is not able to inflict any damage on him. After blowing Katsuki away, All Might turns his attention to Izuku; Izuku activates One For All Full Cowl and attempts to escape but jumps into Katsuki. All Might prisons Izuku with a guardrail and punches Katsuki in the stomach, greatly injuring him and sending him flying backward. All Might prepares to finish off Katsuki; Katsuki tries to move but to no avail. Suddenly, Izuku activates One For All Full Cowl and breaks free of the guard rail; he then punches Katsuki out of the way and the two escape from All Might. While escaping, Izuku convinces Katsuki to work with him by reminding him that he never gives up on winning. All Might chases after Izuku and Katsuki. Katsuki then appears from behind and attacks All Might with an Explosion which distracts All Might. However, one of Katsuki's Grenade Bracers is missing. Suddenly, Izuku appears behind All Might with Katsuki's missing Grenade Bracers equipped on him. Katsuki yells at Izuku to commence his attack; Izuku aims the Grenade Bracer at All Might and releases the trigger. Izuku releases the grenade pin and blasts an immense Explosion at All Might at point blank range. After the Explosion is finished, Izuku and Katsuki dash towards the exit.
However, All Might catches up to Izuku and Katsuki and batters them, sending Katsuki flying and then using Izuku's body to hit an attacking Katsuki; All Might holds the injured Izuku in the air with his arm.
A minute ago, Izuku and Katsuki are running towards the escape gate after blasting All Might with an immense explosion Suddenly, All Might appears before the two, asking Katsuki what he plans to do after that, shocking Izuku and Katsuki. Before the young heroes can react, All Might disables the duo with his strength. Izuku tries activating One For All Full Cowl, but All Might stops him and throws him onto the ground. All Might decides to finish off Izuku and Katsuki. Suddenly, Katsuki gets up and launches a big explosion against All Might, which distracts the Symbol of Peace. Katsuki decides to distract All Might long enough for Izuku to escape. As Katsuki blocks off All Might, Izuku successfully activates One For All Full Cowl and begins his escape while All Might smashes Katsuki into the ground. Seeing Katsuki in trouble, Izuku rushes back to help and punches All Might in the face, then drags Katsuki with him. Izuku passes through the escape gate along with the unconscious Katsuki in tow, which allows Izuku and Katsuki to pass the practical test.
After Izuku and Katsuki pass the practical exam, All Might carries them to Recovery Girl's tent to be healed. Recovery Girls scolds All Might for not restraining himself during his battle with Izuku and Katsuki. Recovery Girl asks All Might to take Izuku and Katsuki back to U.A. to recover. However, a conscious and healed Izuku requests if he can stay and watch the remaining fights as he would like to observe and analyze the other Pro Heroes and his classmates. Recovery Girl allows Izuku to watch the remaining fights. Izuku along with Recovery Girl watch the remaining fights and comment on them; Izuku is happy to see Minoru pass.
Back at U.A. in class, Izuku tries to help Denki, Mina, Rikido and Eijiro relax by telling them that something will happen that will still allow them to go to the forest lodge; Denki launches a comical tirade at Izuku for trying to jinx them. Izuku learns that he passed the written exam and will go with all his classmates to the forest lodge which will be a boot camp. The class see that there are many items on the list that they do not have.
Toru suggests that Class 1-A go shopping together in order to get the items they need for the boot camp.The next day, most of Class 1-A (except Katsuki and Shoto) go to the Kiyashi Ward Shopping Mall, a shopping center that caters for all needs. Most of Class 1-A split up to go and buy their specific needs, leaving Ochaco and Izuku alone. Izuku asks Ochaco what she plans on buying and tells her that he plans on buying heavy wrist weights. Ochaco says that she requires bug repellent; however, she begins blushing as soon as she looks at Izuku. The blushing Ochaco runs off on her own shouting bug repellent, leaving Izuku confused and worried as he thought that Ochaco was referring to him as a bug.
Suddenly, a hooded man asks Izuku for his autograph after recognizing him from the Sports Festival. The hooded man admires Izuku for surviving against Stain and living to tell the tale. However, Izuku slowly realizes that the hooded man is a villain he had already met prior to the encounter with Stain after hearing his talk about the USJ. The hooded man reveals himself to be in fact Tomura Shigaraki. However, this time he does not have his signature hand on his face; the unmasked Tomura invites Izuku to have a talk with him and smiles wickedly.
Tomura continues holding Izuku's neck and tells him to calm down. Tomura tells Izuku that he just wants to have a chat with him and threatens him with disintegration. Izuku warns Tomura that if he attacks him, then a Hero will jump out of the crowd, but Tomura threatens the safety of the crowd. Relenting, Izuku asks Tomura what he wants to talk about.
Izuku and Tomura sit in a plaza, where Tomura explains to Izuku that he hates many things. However, what he truly despises above all is the Hero Killer Stain. When Izuku asks Tomura that Stain was one of them, Tomura reveals that Stain was never apart of the Villain Alliance to begin with and that the media and society merely speculated that Stain was a part of the Villain Alliance. Tomura explains that he and Stain have destroyed things in order to change the world but his fame is still undermined; Tomura asks Izuku what the difference is between him and Stain.
Izuku answers Tomura's question by telling Tomura that Stain and him were inspired by All Might and started their journeys thanks to him. Izuku says that Stain did not destroy because he wanted to, he destroyed in order to try and change the world for the better, according to his ideals. While he does not agree with Stain's methods, Izuku respects Stain for living according to his ideals and never giving up on them. Tomura feels exhilarated as he now understands why Stain and Izuku irritate him; its because of All Might. Tomura also understands why he hates the current society as well; because they are all living happily and grinning like All Might. Tomura thanks Izuku for chatting with him.
Suddenly, Ochaco appears and wonders who Izuku is talking to. Tomura lets go if Izuku and begins leaving, warning Izuku to not give chase. However, Izuku asks Tomura what All For One's ultimate goal is. Tomura gives Izuku his answer; that he does not know and does not care. Disappearing into the crowd, Tomura tells Izuku to take care of himself because the next time they meet, he will kill him. Ochaco calls the Police.
While on a plane, Izuku calls out a daydreaming All Might's name, as he wants All Might to look at the view I-Island from up in the sky on their plane. He's thankful to his mentor for letting him be able to visit the I-Island so early in his summer break from school at U.A. High. All Might chose to invite Izuku because their bond with One For All is thicker than blood.
After the plane lands at the I-Islands airport, Izuku sees All Might shift into his muscular form and he explains that he must maintain this form the entire time to keep his weakness a secret. All Might double checks everything including if Izuku got permission to bring his hero costume along. They exit the plane after Izuku gets changed. As they pass through immigration, All Might asks Izuku what he knows about the island and isn't surprised when Izuku's muttering habit starts. I-Island is an artificial moving island built for scientists to research Quirks.
The pair tour the island, before a young woman appears and shows familiarity with All Might. Seeing their talk, Izuku nearly mistakes her for the friend All Might mentioned until All Might introduces Izuku to Melissa Shield, the daughter of his friend and they quickly get acquainted. It soon gets uncomfortable for Izuku when Melissa gets close to him to check out his hero costume and she notices the scars on his hand. All Might interrupts, reminding Melissa about their agenda.
They arrive at a laboratory, where Izuku is amazed to see All Might's friend and Melissa's father is David Shield. Izuku goes into extreme detail about David's past, while everyone is not surprised by his behavior. David then has everyone leave while he and All Might talk, asking Melissa to show Izuku around the expo.
Walking together, Izuku and Melissa continue getting to know each other. Izuku tells Melissa to call him Deku even though she finds the nickname strange.
Melissa takes Deku through the I-Expo where they notice Pro Heroes including Godzillo, all invited to the event by sponsors. Everyone is also invited to a reception party at the end of the night. Melissa asks Izuku if he's attending and this makes him realize why All Might made him pack formal clothing.
Izuku and Melissa go through the I-Expo where they notice many Pro Heroes including Godzillo, all invited to the event by sponsors. Everyone on the island is also invited to a reception party at the end of the night. Melissa asks Izuku if he's attending and he confirms it, to her joy. Izuku is taken by Melissa to the pavilion where she shows him several of different inventions out on display. Eventually, Izuku asks about Melissa's father and she admits she's aspiring to be a great scientist just like he is. Izuku hears Melissa state she is third year student at I-Island Academy, studying to be a scientist in the same way Izuku is for becoming a hero. They share the same goal of becoming like the people they admire.
Very soon, Izuku's excitement disappears when Ochaco, Momo, and Kyoka suddenly interrupt and suspect Izuku is on a romantic date with this girl. Embarrassed and frantic, Izuku explains that Melissa is just showing him around the expo. When Melissa almost brings up All Might, Izuku stops her and asks her not to say anything while the girls are further suspicious. Izuku's worries are alleviated when Melissa takes the five of them to get tea together at the café. As they talk, Izuku is internally relieved at having avoided spilling any secrets. Soon Denki Kaminari and Minoru Mineta appear and are fascinated by Melissa's beauty while he learns they are working as extra staff at the café. Denki and Minoru question Izuku on how he obtained a beauty like Melissa, as he tries to explain. Luckily, Tenya breaks up the discussion and has Minoru and Denki get back to work. Tenya explains that his family received invitation and he had the rest of the class come as his guests.
After the Police Force close down the mall, Naomasa Tsukauchi takes Izuku to the Police Station to be questioned by him about the event that transpired. At the Police Station, Naomasa questions Izuku about Tomura and their conversation. Although the information Izuku provides is nothing new, Naomasa thanks him Izuku for the information and praises Izuku for being level headed during his confrontation with Tomura as well as keeping collateral damage to a minimum. While waiting for his mother, Izuku meets with All Might and asks him if there were people he could not save, to which All Might replies yes; All Might says that the Symbol of Peace is hope for Heroes and a deterrent for villains. Izuku's mother arrives, crying about what transpired and Izuku tries to calm her down. Izuku and his mother head home. The next day, Shoto announces that the location for the lodge trip has changed and will be announced on the day. The first semester of U.A. ends and summer break begins.
On the day of the event, Class 1-A boards a bus that will take them to the forest lodge destination. An hour later, Class 1-A's bus stops for a restroom break. However, Class 1-A notes that Class 1-B is not at the rest stop.
Suddenly, two females wearing cat-like costumes and a small boy appear. Before they could speak, Izuku excitedly introduces the females as the professional Hero Team, the Wild, Wild Pussycats. He explains their history to his classmates when he mentions how long they have been active, this irritates Pixie-Bob, who angrily seizes him by the face and states she is still eighteen years old at heart.
Mandalay explains to Class 1-A that they have three hours to traverse to their base. Pixie-Bob uses her Quirk to send Class 1-A down to the forest. They encounter a dirt beast; Izuku along with Shoto, Tenya and Katsuki mobilize and destroy the dirt beast.
After Izuku, Tenya, Shoto and Katsuki destroy the dirt beast, Class 1-A begins traversing The Beast's Forest. Class 1-A arrive at the facility at 5:20 pm in the evening. Pixie-Bob admits that she thought they would take longer to get to the facility; Pixie-Bob commends Izuku, Tenya, Shoto and Katsuki for taking quick action against one of her Earth Beasts and concludes that they have experienced action against villains.
Izuku then asks about the boy, Kota and wonders if one of them is his mother. Mandalay explains to Izuku that Kota is her nephew and asks him to say hello to Class 1-A. Izuku introduces himself to Kota. Suddenly, Kota punches Izuku in his crotch and begins walking away. Tenya goes to check on Izuku and admonishes Kota for his actions. Class 1-A fetch their luggage from the bus, put it in their rooms and head to the dining hall to have dinner. Class 1-A finish eating their dinner and head to the hot springs for a bath. After Kota begins falling, Izuku catches him using One For All Full Cowl.
Izuku brings the unconscious Kota to the cabin's office who has passed out from the fear of falling. In the office, Mandalay thanks Izuku for being there to help him. Izuku is surprised that Kota has a jaded view on Heroes. Mandalay explains that there are people in the world who do not like Heroes and if Kouta had a normal upbringing, then he would have grown up to idolize Heroes as well. Pixie-bob arrives and tells Izuku that Kota's parents (who are Mandalay's cousins) were once Heroes. Pixie-Bob tells Izuku about Kota's history and after hearing it, Izuku is reminded of his encounter with Tomura and his similar resentments towards Heroes; Izuku begin to understand that not all people have the same opinion. The next day at 5:30 AM, Class 1-A are outside the training camp cabin. Shota greets his students and tells them that they will undergo reinforcement training to strengthen and upgrade their Quirks which will allow Class 1-A to obtain their temporary licenses.
Izuku trains with Tora. Later that at 4:00 PM, Izuku makes his own curry and while walking back to his class he sees Kota. Izuku follows Kota's footprints and finds him; he offers the curry to Kota after surmising that he did not have anything to eat. Kota harshly tells Izuku that he does not want any of his food or company and demands that he leaves. Kota expresses his contempt for the current society of Heroes and Villains; he is angry that they use their Quirks for violence just to show off and blames Quirks for being responsible for many deaths. Izuku tries cheering up Kota with a story about someone born without a Quirk and could not accept the reality, explaining the moral that it hurts to reject reality. Enraged, Kota orders Izuku to leave and starts threatening him. Izuku apologizes to Kota for not being able to offer any useful advice and leaves the curry on the ground for him. Izuku walks away.
The next day which is the third day of the lodge trip; it is the afternoon and Class 1-A along with Class 1-B are undergoing their Quirk strengthening training. Pixie-Bob informs the students that tonight they will be playing a game; a test of courage.
That evening, Class 1-A and 1-B are cooking themselves dinner. Shoto asks Izuku what he wanted to talk to All Might about; Izuku replies that he wanted to talk to him about Kota. Izuku asks Shoto what he can do to help Kota; Shoto advises Izuku to use action than words. Izuku becomes encouraged from hearing Shoto's advice and knows Shoto is correct. Class 1-A and 1-B finish dinner.
During the test of courage later that night, Spinner and Kenji appear in front of the Pussycats and the remainder of Class 1-A; they attack and knockout Pixie-Bob. The Pussycats prepare to take action while Izuku realizes that Kota is alone and defenseless.
Mandalay tells the Class 1-A students to leave and orders Tenya to take the lead. As Tenya leads his classmates away, Izuku tells Tenya to go on ahead as he informs Mandalay about the villains' objective.
At the cliff, Izuku appears in time to save Kota from Muscular's attack. Izuku concludes that no one can help since his phone got broken in the attack and the location he is fighting in is secret. With no other choice, Izuku activates One For All Full Cowl and prepares to fight the villain who is revealed to be the one that murdered Kota's parents.
Izuku prepares to fight Muscular while protecting Kota. The villain takes off his cloak and activates his Quirk. The battle between Izuku and the villain begins. However, Izuku is taken by surprise by Muscular's empowered speed, causing Izuku to be smashed into the rocky wall. Before attacking again, Muscular asks Izuku where Katsuki Bakugo is because targeting Katsuki is his job. The villain attacks again, but Izuku uses his One For All Full Cowl's enhanced speed to evade in the nick of time. Muscular kicks Izuku into the rocky wall again; Izuku lies on the ground injured.
Izuku is shocked at the incredible strength and speed of the villain's Quirk. Izuku uses an enhanced One For All punch but it does nothing; he is knocked back. Muscular considers Izuku an inferior version of him; he torments Izuku for thinking that he can save the child with his hollow strength, mocking Izuku for being unable to back his words up and laughs at the injured Izuku.
Before the villain can attack Kota, Izuku jumps at Muscular using One For All Full Cowl, telling him that he is the one at fault. Izuku analyzes that the villain's speed surpasses his own and the only slight chance of victory is to close their speed gaps. Izuku punches Muscular with his broken arm, trapping it between the villain's muscle fibers. Muscualr mocks Izuku for thinking that his plan to put them in a position where speed does not matter will work since his inferior strength will not save him. However, Izuku tells Muscular that his job as a Hero is to put his life on the line for the sake of others; with no other choice, Izuku decides to unleash his Quirk's full power: One For All 100%.
Izuku uses One For All 100% against the villain, which blasts Muscular with great force into the cliffside and also partially destroys the cliff due to the great impact. Kota is sent flying away, but Izuku manages to grab Kota's shirt with his mouth and drags him back onto the cliff. After apologizing, Izuku decides that they should quickly escape while the villain is incapacitated. However, Muscular used his Muscle Augmentation to reduce the impact of Izuku's One For All 100% Smash, although Izuku's attack did injure the villain. The villain compliments Izuku for his strength while Izuku is in disbelief that the villain is still conscious even though he used the same output of power as All Might. Izuku tries talking his way out by asking the villains' objective, but he receives no answer from Muscular who puts on his serious eye.
Izuku orders Kota to grab on to him; Izuku uses One For All Full Cowl to jump and run away from the villain. Izuku manages to avoid Muscular's first attack, but barely avoids the villain's second strike which sends Izuku and Kota tumbling to the cliff again. The heavily injured Izuku thinks that getting back to the facility where Shota could erase the villain's Quirk is a good plan, but starts to doubt the plan due to Muscular's speed surpassing his own. Izuku quickly forgets about the plan considering the grave circumstances he is in and decides that he has no choice but to defeat Muscular. Izuku tells Kota to run back to the facility as fast as he can the second he clashes with the villain. Izuku uses 100% Detroit Smash against Muscular which keeps him at bay. Izuku orders Kota to escape while he still can but Muscular considers Izuku's struggle to be in vain. The villain begins overpowering Izuku's attack and begins pushing him into the ground while demanding blood and death. Izuku is barely able to hold back Muscular's strength and is shoved into the ground by Muscular. Suddenly, Kota blasts water at the villain, demanding that he stop. However, the villain says that he will kill Kota after he is done with Izuku. Furious, Izuku refuses to let the villain kill Kota and begins pushing back the villain, eventually pushing the villain off him. Izuku uses 1.000,000% Delaware Detroit Smash against Muscular, a powerful smack with incredible force that smashes Muscular into the cliff. Muscular's artificial eye pops out and Muscular becomes incapacitated due to the great force of Izuku's attack. Izuku roars with triumph.
After defeating Muscular, Izuku takes Kota to safety. While running through the forest, Izuku finds Shota and asks him to protect Kota. Before running off to find Mandalay, Shota asks him to give her a message. Izuku eventually finds Mandalay who is battling Spinner. Izuku activates One For All Full Cowl and shatters Spinner's sword with a leg lunge. Izuku tells Mandalay that Kota is safe and gives Shota's message for her to telepath. Izuku also tells Mandalay that one of the villains' goals is targeting Katsuki and ask her to tell everyone that. As Izuku sprints to the forest, Kenji tries to stop him only to be interrupted by Spinner's knife. Spinner then clarifies that the list belongs to Tomura Shigaraki and tells Magne that Izuku was the person that Stain saw fit to save thus being a man worthy of the title of a true hero.
Izuku runs through the forest, trying to find Katsuki. Out of nowhere, a giant shadow claw is about to attack Izuku; Izuku tries to defend himself, but his adrenaline begins wearing off and starts to feel great pain which stops him from moving. However, Izuku is saved by Mezo. Mezo decides to carry Izuku on his back after seeing his grievous injuries. Mezo explains to Izuku the situation and as a result, Fumikage has lost control over his Quirk.
Izuku and Mezo turn their attention to Fumikage. Struggling against the rampaging Dark Shadow, Fumikage pleads Izuku and Mezo to run away from him otherwise they will die. Izuku watches in shock.
Izuku and Mezo are unable to fight back against the power of the rampaging Dark Shadow. Seeing that their situation is dire, Mezo asks Izuku to decide whether to rescue Katsuki by himself or rescue Fumikage with him. Izuku apologizes to Mezo because he cannot make that decision and says that he has a plan.
Mezo and Izuku arrive to where Katsuki and Shoto are along with Dark Shadow in pursuit, with Mezo asking one of them to make light. Before he can explain further, Moonfish senses Mezo and Izuku's presence and sends one of his teeth to attack them. The rampaging Dark Shadow uses its enormous claw to crush Moonfish, destroying Moonfish's teeth and knocking him out. Shoto and Katsuki are surprised at what happened. Izuku's plan was to lure the rampaging Dark Shadow to their location by creating decoys from Mezo's Replicant Arms which worked. Izuku is happy to see Katsuki, glad that he does not have to save only one of his classmates and sacrifice the other.
After the rampaging Dark Shadow effortlessly defeats Moonfish, Katsuki and Shoto manage to get close to Fumikage and use their Quirks, which calms down Dark Shadow; Dark Shadow reduces in size and retracts back into Fumikage, allowing Fumikage to return to normal. After Fumikage apologizes, Izuku tells Fumikage that their top priority is to protect Katsuki, who is the target of the villains'. Izuku decides that they should escort Katsuki back to the facility and take a shortcut through the forest to do so. However, Katsuki is angry that he needs protecting and refuses their help. The Bakugo Escort Squad (consisting of Mezo, Shoto, Izuku and Fumikage) begin escorting a begrudging Katsuki back to the facility.
The Bakugo Escort Team travel to the facility and come across Ochaco and Tsuyu. After seeing that Ochaco and Tsuyu are alright, Izuku asks them to join the escort. However, Ochaco and Tsuyu wonder why Katsuki is not with them. Mezo, Shoto and Izuku turn around only to find that Fumikage and Katsuki are missing. Suddenly, a masked villain known as Compress appears on a tree branch and reveals that he used his “magic” to take Katsuki by turning him into a marble. The masked magician-like villain states that the Heroes do not deserve someone of Katsuki's caliber and notes that Katsuki will shine even brighter on the villains' side. Izuku demands that he give Katsuki back.
Shoto attempts to stop Mr. Compress with ice, but Compress's speed allows him to avoid Shoto's attacks. Mr. Compress also reveals that he captured Fumikage due to his great power, much to Izuku's anger. Compress begins escaping. Izuku refuses to give up and hatches a plan to save Fumikage and Katsuki that involves them flying towards Mr Compress. Izuku insists that he goes along which convinces Ochaco and Shoto. They execute the plan; Tsuyu wraps her tongue around Izuku, Mezo and Shoto while Ochaco uses her Quirk to make them weightless. Tsuyu throws the weightless Izuku, Mezo and Shoto towards the Compress. The three fly at Compress at high speed and reach him. Ochaco deactivates her Quirk, causing them to land on Compress and smash him onto the ground at the villains' rendezvous point. Izuku, Shoto and Mezo see that they are right in front of Dabi, Himiko and Twice.
Dabi launches his flames, which hits Izuku and injures his arm. Himiko decides to fight and attacks Izuku, telling him her name and thinks that he should bleed more. Mezo smacks Himiko off Izuku while Shoto deals with Twice. When Mr Compress finds that his pocket is empty, Mezo reveals that he took the marbles Fumikage and Katsuki from Mr Compress, much to Izuku's happiness.
As Izuku and Shoto prepare to backup Mezo, Kurogiri arrives and blocks their path. Mr. Compress reveals that the real marbles are in his mouth, causing Izuku to chase after Mr Compress. Suddenly, Mr Compress is hit by Yuga's Navel Laser, causing him to spit out the marbles. Izuku, Mezo and Shoto rush to grab the marbles, although Izuku starts succumbing to his injuries which causes him to fall to the ground. Mezo grabs the marble containing Fumikage, thus saving him. Shoto is almost in reach of the marble containing Katsuki and nearly grabs it, but Dabi snatches it away before Shoto can grab it.
Mr Compress deactivates his Quirk which frees Fumikage and Katsuki. Dabi and Mr Compress begin teleporting away along with Katsuki. Before teleporting with the villains while Izuku desperately tries running to save him, Katsuki tells Izuku to stay away. Dabi, Mr Compress and the captured Katsuki successfully teleport away. Izuku howls in grief due to being unable to save Katsuki.
Two days later at a hospital near the training camp, Izuku is recovering from his grievous injuries as a result of his battle with Muscular. Class 1-A arrive to see Izuku; Izuku is depressed about his failure and the fact that his Quirk amounted to nothing when he needed it the most. However, Eijiro states that Izuku can fix his mistake thanks to Momo planting a tracking device on one of the villains.
However, most of Class 1-A are against the plan. A doctor enters and asks Class 1-A to leave so that he can speak to Izuku privately. As Class 1-A leave the room, Eijiro tells Izuku that they talked with Momo yesterday and have decided that they will rescue Katsuki tonight, inviting him to join them. After Eijiro leaves, the doctor informs him that although his arms are healed, his ligaments are deteriorating and should he gain the same injury twice he will never move his arms again. The doctor tells Izuku that he is being discharged and hands Izuku a letter from Kota.
Later that night in front of the hospital, Izuku arrives to see Eijiro and Shoto along with Momo. However, Tenya arrives who is angry that they are about to repeat the same mistake he made at Hosu. Although Izuku understands that breaking the rules is against the law, Tenya punches Izuku in the face for not taking his feelings into consideration; Shoto and Eijiro assure Tenya their rescue will be covert while Momo says that she will ensure that there is no combat involved. Izuku tells Tenya that he must save Katsuki. Seeing that they are determined and resolute, Tenya decides to accompany them.
Before leaving to rescue Katsuki, Izuku phones his mother and informs her about his wounds. Izuku's mother asks if he can stop going to U.A., to which Izuku replies that he is All Might's successor and as the successor he cannot sit back and relax. The group boards a train to a place called Kamino Ward a place in Yokohama City in the Kanagawa Prefecture. At Kamino Ward, Izuku along with Shoto, Eijiro, Momo and Tenya put on disguises to make infiltration easier as well as to prevent the League of Villains from recognizing them.The disguised group exit the clothing shop and Izuku sees a video clip of the public apology issued by U.A.. After watching the clip, Izuku sees that U.A. are being treated like criminals and that the mood of the people watching has become heavy against U.A.
Izuku along with Eijiro, Shoto, Momo and Tenya continue towards the place that Momo's tracking device is detecting. After waiting for a while near the place, Momo notes that the villains have made no movements and states the possibility of Katsuki not being in the place while Tenya reminds them that if he sees any combat, then he will not hesitate to stop them. Izuku thanks Tenya and starts thinking about their options in "true Midoriya" fashion according to Eijiro and Momo. Afterwards, Momo, Tenya, Shoto, Eijiro and Izuku prepare to infiltrate the supposed League of Villains' hideout.
Izuku along with the group go to the back of the hideout and see a window. Izuku stands on Shoto's shoulders to see what is inside. After Eijiro sees the inside with his night-vision goggles, he hands them over to Izuku. Izuku looks inside and sees that there are Nomus, confirming that the hideout is actually a warehouse. Suddenly, Mount Lady destroys the front of the warehouse which shocks Izuku.
Seeing that the Pro Heroes are at the warehouse, Izuku and the group assume that All Might is with Katsuki as they are speaking. Izuku and the group decide to head home. Suddenly, the entire warehouse is completely destroyed along with the surrounding area being significantly damaged. The man's aura above them utterly terrifies Izuku, Eijiro and Shoto. Izuku starts to realize who the man above them is since All Might told him about All For One; Izuku is in utter disbelief that he must eventually face such a monster in battle.
Izuku is paralyzed by fear and is unable to move. Katsuki has been teleported near the man, which catches Izuku's attention. Izuku quickly hatches a plan to rescue Katsuki but realizes that it will fail due to there being no options of escape. Izuku prepares to move, but Tenya stops him.
As the battle between All Might, Sensei, Katsuki and the League of Villains continue, Izuku knows that they are in a crisis and there are no openings to rescue Katsuki due to All For One's presence and Katsuki being outnumbered by the Vanguard Action Squad. Suddenly, Izuku comes up with an idea. Izuku says that the plan will not involve fighting and that it will enable them to rescue Katsuki and escape. However, the entire plan rests on Eijiro because Katsuki will respond to him due to the friendship they have built up during their time at U.A. Tenya understands that the plan is a gamble but considering the situation there will not be much risk due to All Might's presence. Sensei sees the trio and attempts to attack them, but All Might intervenes by punching Sensei. Katsuki sees the trio while Eijiro yells at Katsuki to take his hand. Tomura tries to take Katsuki, but Katsuki uses his Explosion to launch himself towards Izuku, Tenya and Eijiro. Katsuki grabs Eijiro's hand and they make it the air.
Kenji and Spinner launch Mr. Compress into the air, but Mt. Lady intercepts him, allowing Izuku along with Eijiro, Tenya and the rescued Katsuki to get away. Izuku, Eijiro, Tenya and Katsuki land on the ground far from the battlefield and begin escaping.
Izuku and his group along with Katsuki escape safely into a crowd. Izuku sees All Might battling All For One on the broadcast screen and screams at him to win. After All Might defeats All For One, Izuku celebrates. After the battle, All Might points to the camera and delivers a message: "You're next." The citizens watching take All Might's message as a warning to all villains out there, causing the citizens to praise All Might and start celebrating again. However, Izuku knows what All Might's message truly meant; that his time as Symbol of Peace has come to an end and he (Izuku) is the next successor. Izuku now realizes that All Might's time has truly come to an end and starts crying.
Izuku along with Eijiro, Tenya and Katsuki meet up with Shoto and Momo. They take Katsuki to a Police Station for safety. Afterwards, Izuku says goodbye and heads home. Izuku arrives home and his mother is glad to see that he is safe and sound. Izuku goes to his bedroom and lies on his bed, exhausted from everything that has transpired and wonders if he made the right choice to rescue Katsuki. Later that evening, Izuku receives a message from All Might. Izuku runs out of his home and heads towards All Might's location.
At the Dagobah Municipal Beach Park, Izuku goes to All Might. However, All Might greets Izuku with a Texas Smash as a part of his scolding. All Might reveals to Izuku that he can no longer use One For All and demonstrates this by entering his Hero form, only to exit it in a split second afterwards. All Might informs Izuku that he is retiring as a Hero since he is in a state where he cannot fight anymore. All Might scolds Izuku for never doing what he is told and for his recklessness in rescuing Katsuki. However, All Might is glad that his recklessness did not get him injured this time and is proud of Izuku for that. All Might hugs Izuku and apologizes for not being a proper mentor towards him, but from now on he will focus solely on Izuku's development and training. Izuku begins to cry, to which All Might scolds him for again. Izuku now fully understands that the age of All Might has come to an end.
Toshinori visits and enters the Midoriya household, with Izuku and his mother flabbergasted that the Number One Hero has entered their abode. After the three sit down at the table, Toshinori asks Inko for her permission to send Izuku to the U.A. dorms. However, she is against it, much to Izuku's shock since they agreed that he could be relocated to U.A.'s dormitories. She explains that she is worried about her son since his Quirk damages him rather than helps him and is deeply concerned about her son's future as a Pro Hero after witnessing All Might's brutal battle, unable to bear the fact that Izuku will also have to face such bloody battles with no hope possibility of full recovery. Inko states that she has no confidence in U.A. and is unable to entrust her son to them.
Izuku tries to convince his mother that his injuries are a result of his inability to control his Quirk, but Inko replies that regardless it is still the responsibility of U.A. to take care of their students which they have not done. Inko understands that she is being a strict parent but the safety of her child is her number one priority and she is fine with Izuku continuing to become a Hero since it is his dream as long as he is in a safe environment, which is why she wants to send Izuku to another school. Although he understands his mother, Izuku wants to continue his dream at U.A. since that is where Toshinori became a Hero.
Izuku runs out of the room while Toshinori understands Izuku's frustration; that it must be painful not being able to study at the same place his idol went to. Izuku returns to the room with a letter in his hand; the letter is a thank you from Kota. Izuku tells his mother that at the training camp, he saved a boy, who hated Quirks and Heroes, from a villain. Izuku understands that he has a long way to go but for a little while, Kota and his thank you letter made him a Hero. Izuku declares that even if he cannot study at U.A., he will still keep dreaming to become a Hero.
Toshinori is shocked that Izuku is willing to continue his dream even though it is not as the same place as his idol; Toshinori is impressed with Izuku's growth and is glad that he is going on his own path instead of following him, his idol. Toshinori transforms into his Hero form and kneels before Izuku and Inko, bowing his head, much to their shock.
All Might apologizes to Inko for his negligence as Izuku's teacher and understands that she is worried about the bloody path of a Hero; All Might asks Inko to allow him to walk together with Izuku down his path so that he does not have a bloody future. The former Symbol of Peace also understands Inko's concerns about the current U.A. and tells her that they are reforming their ways. All Might promises that he will nurture and protect Izuku even at the cost of his own life.
Inko is shocked at All Might's resolve, causing her to fall to her knees. Inko states that all she wants is Izuku to be happy and tells All Might that he should never trade his life away for someone else's sake. Inko tells All Might to continue living and that as long as he can to protect and nurture Izuku, she will reconsider her decision to not send Izuku to live at U.A. All Might pledges to protect and nurture Izuku while Izuku tells his mother that he will not worry her.
Outside, Toshinori compliments Izuku's mother, telling Izuku that she reminds him of his master. Toshinori leaves and tells Izuku that he will see him at U.A..
Following Bakugo’s rescue and the retirement of All Might, Nezu transformed U.A. into a boarding school in order to protect the students. The Height Alliance was built in just three days. Shota Aizawa meets with his students outside of the building. He states they must start preparing to get provisional hero licenses like they had planned to during the training camp. Then, Shota scolds Izuku, Tenya, Momo, Eijiro, and Shoto. He knows that they were present at the site of Katsuki Bakugo's rescue and took it upon themselves to rescue him. He also knows that the rest of Class 1-A, except Katsuki, Toru, and Kyoka, also knew about their plans but did nothing to persuade them. He further more says he would have expelled everyone but Bakugo, Hagakure and Jiro from the school, if it weren't for All Might's sudden retirement. Shota advises the group that went to save Katsuki to go through the proper procedures next time which will also restore the trust between them.
Class 1-A arrange their luggage in their respective bedrooms. Later that night, the boys of Class 1-A are in the common space on the first floor. The girls talk the guys into a refreshingly lively competition to see whose dorm is the best among the rest and will be crowned the "Room King", to Izuku horror. He tries to stop the girls, but they invade his room and notice it's filled to the brim with All Might merch and posters. Uraraka calling it an otaku room.
After the competition, at Ochaco's urgings, Izuku along with Shoto Tenya, Momo, and Eijiro all meet outside the dorm where they find her with Tsuyu. Tsuyu apologizes for harshly doubting their plan to save Katsuki, as they apologize for worrying her and they manage mend their friendship.
The next day, Class 1-A begin their school life anew. In Class 1-A's room, Shota Aizawa mentions that their first objective will be earning their "Provisional Hero Licenses". To prepare for the Provincial Hero License exam, Class 1-A students will create at least two signature Super Moves that they will use in combat, with his help and that of Cementoss, Ectoplasm, and Midnight. He also recommends them to upgrade their hero costumes.
While all of Class 1-A begin training, Izuku Midoriya is puzzled and confused as to what his special move should be. One of Ectoplasm's clones scolds Izuku for daydreaming; Izuku tells the Ectoplasm clone that he has not thought of any special moves because he must keep in mind not to try and break his arms in the process. The Ectoplasm clone advises Izuku to focus on developing his Quirk instead. All Might arrives, wanting to see Class 1-A developing their special moves since it is his job as a teacher to oversee the training of his students. All Might approaches him and gives Izuku advice: he is still trying to imitate him, which confuses Izuku. Before Izuku can question further, All Might goes to help Eijiro Kirishima. All Might is teaching Izuku to think independently.
Following the recommendations of Shota, Izuku heads to the Development Studio for a costume upgrade. Izuku waits outside the door as Ochaco and Tenya appear. Before they can greet each other, an explosion from the development studio sends Izuku flying back, much to Tenya and Ochaco's shock. As the smoke clears, Power Loader scolds the person responsible for the explosion. The person responsible for the explosion is none other than Mei Hatsume who has landed on top of Izuku. Mei recognizes Izuku from the Sports Festival. Izuku gets embarrassed from the sight of Mei's bosom and moves.
Mei apologizes for the explosion she caused; she asks the Class 1-A trio for their names since she forgot them. Izuku, Ochaco, and Tenya remind Mei of their names. Izuku asks for a costume upgrade, which catches Mei's attention. Power Loader reminds Mei that he is fine with her working in the Development Studio but must not cause chaos, otherwise, he will ban her. Power Loader turns his attention to Izuku, Ochaco, and Tenya and invites them into the Development Studio. Inside the Development Studio, Izuku, Ochaco, and Tenya are amazed at all the machinery in it. Power Loader explains to the trio about hero costume upgrades; after looking at their respective costume instructions, he will be able to tinker with their costumes. If it is small improvements and fixes, all he needs to do is inform the design office about the changes, but if it is big improvements, he must prepare a formal written application to the design office to request approval. After the newly upgraded costume gets inspected and approved, it goes back to them. Power Loader tells the trio that the design office he is partnered with is one of the best, so any costume upgrades can be done within a mere three days.
Izuku asks Power Loader if there is something that can reduce the stress on his arm ligaments; Power Loader replies that minor tinkering to his hero costume will make it possible. Suddenly, Mei inspects Izuku's body and makes him wear a powered exoskeleton, much to Izuku's discomfort. Izuku once again asks for simple arm support while Tenya asks for cooling capabilities for his legs. As Izuku watches Mei gives Tenya Super Cooler Electric Boosters. He hears her remark that Tenya he must run with his arms, which confuses Tenya. However, Mei's proverb makes Izuku realize what All Might was saying about him imitating him.
Izuku suddenly realizes that his way of thinking has been wrong; people who invent are not bound by conventional thinking and in order to improve himself, he must think out of the box like Mei. While Mei helps out Ochaco, Izuku asks Tenya to help him with something.
Meanwhile, the rest of Class 1-A are progressing on improving their Quirks. Four days later at the Gamma Gym in the midst of training, All Might shows up and Shota tells him that Class 1-A are progressing nicely. Minoru comments on the change of Izuku's costume, causing Izuku to reply that he received arm support to lessen the stress on his arms.
When Katsuki tests out his new special move called AP Shot on a rock, a move that creates an Explosion beam. Katsuki's AP Shot successfully executes and penetrates a rock but causes the rock to begin falling towards All Might. Suddenly, Izuku appears and destroys the rock with a kick. Izuku then destroys the remaining rock with another kick. All Might is impressed that Izuku figured out his advice on his own. Izuku has realized that just because he is the new successor of One For All, it does not mean that he must inherit his predecessor's fighting style, in this case All Might's punching style, and is free to choose his own fighting style. Taking Mei's words into consideration, and Tenya's help, Izuku has decided to forego All Might's punch fighting style and redevelop his own fighting style. The technique Izuku used to destroy the rocks is called One For All Full Cowl: Shoot Style, a technique that is an application of Izuku's new kick-based fighting style. It is a fighting style focusing on kicking, thus strengthening his kicks.
Izuku is asked by Minoru of why he did not change his costume entirely. Izuku thought back to his mother making the suit for him and her stating she will support him all the way. Izuku stated he did not want to ruin it.
The class then headed for the Takoba National Stadium. While there Izuku sees some of Class 1-A are nervous, but Shota encourages them to do their best so that they can pass this exam and further their goal in becoming Heroes. He has Class 1-A huddle together; suddenly, a student interrupts their huddle, causing another student to tell Inasa that it is rude to interrupt other people's huddles. Inasa expresses his apology to Class 1-A with vigor and bows to them while smashing his head into the ground and bleeding, much to some of Class 1-A's shock.
Other participants of the exam recognize the students with berets; Katsuki comments that there is a high school in the west (Kansai) that is on par with U.A. High (which is from the east). The people standing in front of Class 1-A are students from the famous Shiketsu High. Inasa energetically expresses his excitement about competing with U.A. and wishes Class 1-A the best of luck. As the other students of Shiketsu High and Inasa leave, Shota tells Class 1-A that the energetic student's name is Inasa Yoarashi and states that he is a powerful contender; at U.A.'s entrance exam, the same year Class 1-A took it, Inasa received the top score and passed. However, despite receiving the top score, Inasa declined his admission offer. Izuku is surprised with Inasa's prowess and thinks that he might be as talented as Shoto.
The female teacher that Shota apparently knows is “Smile Hero” Ms. Joke and Izuku tells the class of her Quirk is Roaring Laughter; Ms. Joke's Quirk forces others to laugh which impairs their cognitive and motor skills.
During the first portion of the exam, Izuku warns his classmates that the other students may know of their quirks from watching the Sports Festival. Surely enough, students immediately come after them and attempt to eliminate them but Izuku leads his classmates against this and they overcome their opponents. However, the other schools realize the class has gotten stronger and proceeds to separate them with their quirks. Alone, Izuku engages Camie. During the skirmish, Izuku saves her when she is disguised as Ochaco but recognizes she isn't his friend. The fight ends with Camie scratching Izuku and leaving after Hanta Sero and the real Ochaco arrive.
While waiting for the Second Exam to start, Izuku is grabbed by a jealous Denki and Minoru who were told by Hanta that he had seen Camie's naked body. Izuku tries to explain her Quirk but a flirty wave from Camie only makes his situation worse. After Camie walks away, she says goodbye to Izuku who nervously returns it but it is still on rocky terms with his classmates.
Izuku tends to an injured child who is revealed to be one of the people grading him and gives him a hard time at first. Realizing the test's true purpose, Izuku tries again by smiling and using kind words to reassure him, which works. Izuku tells Ochaco and Tenya that he will take the child to the first-aid station but will return for them.
After passing his Provisional Hero License Exam, Izuku sends All Might a message of a picture of his license. He is very happy but he is called on by Katsuki who tells him they need to talk about his Quirk, which makes him nervous.
Izuku goes with him to Ground Beta, the site of the Battle Trial where he and Izuku fought for the first time. Katsuki remembers the time where Izuku was a Quirkless good for nothing and then suddenly out of thin air he manifested a Quirk and by some miracle he was accepted into U.A. and even received his Provisional Hero License while he failed. Izuku tells Katsuki that he received his Provisional Hero License for performing well, but Katsuki orders him to keep quiet and let him finish.
When Katsuki states he has been putting the pieces together, Izuku was fully aware as to what Katsuki has discovered. His worries are confirmed as Katsuki states that he received his Quirk from All Might since he witnessed All For One's ability to steal Quirks and bestow them onto others as well as figuring out that All Might is an acquaintance of All For One, Katsuki hypothesized that All Might also has some form of Quirk transference because he has become weaker ever since coming to U.A. and meeting with Izuku. Seeing that Izuku is not denying anything, Katsuki knows that he is right about Izuku gaining All Might's Quirk. His secret out, Izuku simply asks Katsuki how knowing the truth about his Quirk is going to help him. Katsuki knows that he and Izuku have always looked up to All Might and seeing the person who he thought was a pebble on the side of the road being acknowledged by the person he looks up to is why Izuku is going to fight him here and now.
Izuku questions the reason as Katsuki states its in order to gauge his talents and to vent out his anger after the School Trip Arc, believing that All Might's retirement was his fault.
Izuku will not attack, Katsuki attacks him first and demands he fight back. Reluctantly, Izuku agrees as he wanted to see if his new fighting style would work against Katsuki. Izuku is overwhelmed by Katsuki this causes Izuku to increase One For All: Full Cowl at 8%, which allows him to fight equally for the time being.
Despite Izuku's increase in power and technique, he still ends up losing to Katsuki. After the battle, he is berated for his loss by Katsuki who questions if he has the world's strongest power how he lost. Toshinori appears and revealed his relationship with Izuku and One For All. Katsuki then promised to keep the secret between the three of them and vows to surpass Izuku with his Quirk as Izuku makes the same vow. They are then taken in by Shota who scolds at them for having a fight on school grounds. Because he defended himself in the fight, he is given three days of punishment while Katsuki is given a longer time for initiating it. As they were cleaning, Katsuki gives Izuku a few pointers on his new technique and tells him the flaw in his new fighting style.
As Izuku cleans, a person face appears inside a wall and floor, encouraging him to keep his spirits up. Three days later, he is released from his punishment and wants to eagerly catch up as his classmates are surprised but amazed by his determination. Shota Aizawa introduces Class 1-A to the people who will teach them about Hero Internships; the third-year students who rank among the top of all U.A. students known as The Big 3: Mirio Togata, Tamaki Amajiki and Nejire Hado.
The personalities of the three students leave Class 1-A confused, who get even more confused when Mirio Togata challenges them all to a fight. At Gym Gamma, Mirio tells Class 1-A to attack him whenever and wherever they want. Izuku volunteers to fight Mirio and the class are further impressed with him. He attacks him but he is taken by surprise when Mirio's clothes suddenly fall off his body. He rushes to get his pants back on and Izuku kicks at his head. Izuku's foot phases clean through Mirio's head and the former confirms Mirio's Quirk allows him to pass through things.
Mirio turns his attention to Izuku and gets attacked from behind by Yuga, Hanta, and Mina's Quirks. Their attacks slip right through Mirio's body and he disappears in the ensuing explosion. He suddenly reappears behind the class and claims he'll take out the long-range fighters first. Using a combination of his Quirk and technique, Mirio defeats half of Class 1-A within a few minutes.
Mirio turns his attention to the close ranged combatants of Class 1-A. Izuku tells the class that he analyzed that, whatever Mirio does, he will use a direct attack and during that moment they should counter-attack. Mirio charges and he begins submerging into the ground. Suddenly, Mirio appears behind Izuku, who correctly predicts Mirio's tactics and delivers a swift kick to the head. Mirio phases through Izuku's body and uses his super move called Blinder Touch Eyeball Crush:Mirio looks like he intends to poke Izuku's eye, to which Izuku closes his eyes. In actuality, Mirio fakes poking Izuku's eye by phasing his finger to act as a diversion; instead, Mirio hits Izuku in the stomach. With Izuku defeated, Mirio proceeds to subdue the rest of Class 1-A, hitting the rest of Class 1-A in their stomachs as well, and defeating them.
While Class 1-A recovers, Mirio talk about his Quirk Permeation and advises class 1-A to participate in the Hero Work-Studies, as it will help them improve their career to be heroes, just as it helped him become one of the best students in the U.A.
Following Mirio's advice, Izuku reaches out to Gran Torino for a Work-Study opportunity. Gran Torino has to refuse because he's busy working with the Police, and recommends him All Might's former sidekick, Sir Nighteye. Izuku goes to All Might in the staff room and asks him to introduce him to Sir Nighteye for a Hero Work-Studies. All Might refuses to help Izuku for several reasons, much to his surprise. Izuku tells All Might that if he is under the guidance of Nighteye, it will serve as a strong point of comparison to him and he must become stronger than anyone else. All Might does not dislike Izuku's determination but he still will not be getting an introduction, not from him, so he later asks Mirio if Izuku is fit to work under Nighteye. Mirio replies that there is no problem and considers Deku fit.
Mirio takes Izuku to Sir Nighteye's office and tells him he must make Sir laugh to be accepted. Izuku messes up his first impression but gains Sir Nighteye's interest. Sir Nighteye claims he doesn't know how Izuku can be useful and asks how he can make an impact on society as All Might has. He challenges Izuku to take the stamp from him within three minutes. He's unimpressed with All Might's decision to pass on One For All to Izuku. He even tells the young student that he's unworthy and that Mirio should've been the one to inherit One For All.
Izuku refuses Sir Nighteye's words and fights on. Despite his efforts, Deku fails to snatch the stamp from Sir Nighteye. However, he is impressed with Izuku's focus as he fights without ruining the All Might memorabilia posted across the office. Sir Nighteye decides to employ Izuku. Confused, Izuku says that he failed. Sir Nighteye replies that he never said he wouldn't employ the student if he failed. He claims he had planned on taking on Izuku only to see if he really is worthy of being the inheritor of One for All, and initially plans to put Izuku through many hardships. Izuku accepts the challenge and day one of the Work-Study begins immediately. Izuku learns of Sir Nighteye's investigation of the Shie Hassaikai and their leader Overhaul.
While on patrol Izuku and Mirio Togata bump into Eri who was being chased by Chisaki. Chisaki apologizes to Izuku for his daughter's behavior because she gets carried away with her fun and games. Mirio tells Izuku that he forgot to put his mask on. As Mirio apologizes to Chisaki, Izuku is aggravated by his mistake of letting Chisaki know that he and Mirio know each other, which will make Sir Nighteye's job more difficult. Izuku acts innocuously to correct his mistake while Mirio identifies Chisaki as a member of the Eight Precepts of Death due to his mask, to which Chisaki states not to pay heed to his mask as he simply dislikes dirt. Chisaki mentions that he has never seen the two of them before and wonders if they are rookies due to their youth. Mirio replies that they are indeed rookies. Chisaki asks Mirio the Hero office he is affiliated with and Mirio replies that they are still students participating in field training. Mirio and Izuku prepare to leave, but Eri tells Izuku not to leave as she starts shedding tears.
Izuku tells Chisaki that his daughter is frightened by something, to which Chisaki replies that he scolded her. However, Izuku is not convinced since Eri is clutching onto him tightly and suspects that there is more than meets the eye. Izuku asks about the bandages, which Overhaul replies that Eri falls down a lot, but Izuku is still not convinced as she is completely frightened and finds the situation to be unnatural. Chisaki politely asks Izuku not to impose his idea of normal on others' families while Mirio tries convincing Izuku to leave since many people have different dispositions. Izuku breaks the ice and asks Overhaul what he is doing to the girl.
Chisaki gives in and tells the Heroes to follow him as his situation with his daughter is an embarrassing topic. Chisaki, Mirio, and Izuku holding Eri follow Chisaki into the alley. Chisaki comments that his daughter defies him all the time and finds understanding children to be quite difficult especially when it comes to considering the kind of person they want to become. Izuku and Mirio see Chisaki removing his glove and has killer intent. Suddenly, Eri runs to her father, causing Chisaki to stop removing his glove. Chisaki apologizes to Izuku and Mirio for Eri's tantrum and thanks them for listening to his worries. Chisaki wishes the Heroes good luck as he leaves with Eri. Mirio stops Izuku from going after Eri while commenting that Chisaki used his killer intent to make Eri listen to him. Mirio asks Izuku to respect Sir Nighteye's orders because chasing Chisaki too far will make him harder to catch.
Izuku along with the heroes and police make their way to the underground labyrinth to arrest Chisaki, they find a dead-end. Mirio phases through the wall and reports that the hallway is on the other side. After Izuku and Eijiro break through, Joi Irinaka begins twisting the hallway and closes off the basement's entrance. The heroes than fall down in to a separate section of the building where they meet three member of the Eight Expendables. Tamaki decides to deal with the three enemies and tells the rest of the heroes to go on. As the heroes went on they are apprehended by more of the Eight Expendables, Fat Gum and Kirishima are then separated from the group and face off against Kendo Rappa and Hekiji Tengai. As Izuku, Aizawa and Rock Lock proceed to go after Chisaki they are separated and attacked by the Toga and Jin Bubaigawara, the two villains and Jio are defeated by the heroes.
Mirio has sustained injuries all over his body but has held off Chisaki's attacks and protected Eri. Chisaki prepares one final attack when Izuku suddenly bursts through the wall. Having fused with Shin, Chisaki feels relieved. Izuku analyzes the situation; Sir Nighteye is protecting Mirio and Eri, Shota has disappeared and the transformed Chisaki has been healed. Chisaki mocks Mirio for wasting his time trying to become a Hero as it has been all for naught now that he has lost his Quirk and could have avoided this tragic fate had he simply not got involved. Izuku and Sir Nighteye are surprised that Mirio has lost his Quirk.
Chisaki charges forward while Izuku appears above and throws a column of rock at Chisaki who destroys it with ease. Izuku grabs another column of rock and tries again only for Chisaki to smash it to pieces and counters by reconstructing the broken pieces into sharp stones. However, Izuku's iron soles protect him from the sharp edges and he proceeds to smash Chisaki's constructed sharp stones into pieces. Seeing Izuku's simple battle style, Chisaki is not impressed. Suddenly, Chisaki is hit by one of Sir Nighteye's Hypermass Seals but manages to block it; Sir Nighteye orders Izuku to protect Mirio and Eri while he handles Chisaki. Izuku goes to Mirio and Eri's location with his enhanced speed as he remembers Shota telling him to not do anything that will leave him unable to move.
Izuku reaches Mirio and Eri and sees that they are fine. Izuku smashes open the wall which reveals the path he along with Shota and Sir Nighteye took to get here. Izuku decides that they should put distance between themselves and Chisaki. Izuku carries Mirio and Eri into the pathway; Eri apologizes while Mirio looks back to see Sir Nighteye.
During the battle between Sir Nighteye and Chisaki, Sir Nighteye activated his Foresight Quirk. Whatever future he sees cannot be changed; this is the absolute rule as he himself has tried to change the future to no avail. Sir Nighteye saw into his future; amidst the scene of his likely defeat, Sir Nighteye held onto a silver of hope that Eri would be saved, the boys safe and Chisaki defeated as well as imprisoned.
Chisaki goes past the impaled Sir Nighteye and chases after Izuku. Izuku is horrified at Sir Nighteye's terrible condition as Chisaki launches rock spikes at Izuku. Izuku stomps on the ground using his enhanced might, preventing Chisaki from reconstructing the ground. Chisaki sees through Izuku's plan but is surprised that Izuku is displaying greater strength than a few minutes ago. The reason for Izuku's enhanced might is because he has activated One For All 20%, even though its making him feel great pain.
Izuku tells Ochaco that he is leaving Sir Nighteye to her as he goes to rescue Eri. However, Chisaki prevents Izuku from reaching her with a rock pillar and he grabs her. Chisaki is annoyed with everything being ruined and seeing the hole, an opportunity of escape, prepares his escape by reconstructing a large and long rock pillar to take him to the surface. Izuku refuses to let Chisaki get away.
Izuku tries to chase after Chisaki, Eri's Quirk begins activating which causes Chisaki and Shin Nemoto to split apart, returning Chisaki and Shin to normal. Filled with utter determination, Izuku unconsciously activates One For All 100% and prepares to attack Chisaki with a kick, while Chisaki launches reconstructed stone pillars at Izuku. Surprisingly, Izuku despite using One For All 100% his body along with all his injuries have been healed. Izuku realizes that his healed body is thanks to Eri's Quirk ability. Suddenly, Izuku begins feeling the immense recoil of One For All 100%. Chisaki appears and states that Eri has unlocked her power but does not know how to stop it and launches reconstructed pillars at Izuku to which he dodges. The newly fused Chisaki appears, looking similar to a stone dragon. From the dragon's maw, Chisaki appears and reveals that Eri can rewind humans and depending on how she controls it, calling her Quirk a curse and warns Izuku that holding onto Eri is dangerous, which is why he is demanding that Izuku returns Eri to him because only with his Quirk can he stop Eri's cursed Quirk.
Izuku vehemently refuses to hand back Eri and will hold onto her no matter what. Having experienced Eri's Quirk, Izuku sees that the moment his legs broke Eri reverted them back to normal before he could experience any pain and thinks that Eri's Quirk is a kind, gentle Quirk contrary to Chisaki's thoughts, which shocks Eri. Understanding that Eri's Quirk reverts any pain and grievous damage back to normal at blinding speed, Izuku decides that he does not need to hold back since all major recoil and damage accumulated by his Quirk will be continuously reverted and healed thanks to Eri's Quirk, therefore not needing to worry about turning into nothingness.Izuku asks Eri if she will lend him her power and, going all out, activates One For All: Full Cowl - 100%.
Chisaki reconstructs the surrounding area and attacks Izuku with stone columns. However, Izuku's greatly enhanced speed thanks to One For All: Full Cowl: 100% enables him to dodge with ease. Izuku delivers a kick packed with massive strength and sends Chisaki flying into the air. Himiko Toga witnesses Izuku's strength and is mesmerized by it.
Izuku jumps towards the airborne Chisaki who has healed his injuries by reconstructing himself and tells the fake Heroes to stay out of his way as he slashes at Izuku with one of his claws. However, Izuku evades with ease and knows that Chisaki can repair himself with his Quirk through disassembling and reassembling at a fast rate, but he plans on using the great power of One For All: Full Cowl: 100% to close that gap and beat him before he gets the chance to recover with his Quirk. Izuku charges towards Chisaki and starts pummeling Chisaki's monstrous stone body, shattering it as Chisaki is unable to counter attack. Izuku reaches Chisaki's own body and pummels away. Izuku questions that if he cannot save one little girl right in front of him, then he can never become a Hero that saves everyone.
Ochaco and Sir Nighteye have reached the surface and bear witness to Izuku and Chisaki's battle. Ochaco questions Sir Nighteye's vision about Izuku dying. Sir Nighteye replies that it is the unchangeable future he saw but is surprised that events are playing out differently. Izuku reaches Chisaki and punches him in the face with enough force that not only sends Chisaki reeling but also breaks off his plague mask.
Izuku Midoriya has delivered a massive One For All: Full Cowl - 100% enhanced punch to Chisaki, which defeats him. Chisaki's massive stone body falls onto the ground, with Chisaki himself grievously injured. As he lands on the ground, Izuku asks Eri is she is fine. Suddenly, Eri's Quirk starts going out of control. Chisaki wills himself back into consciousness and attempts to attack Izuku with his stone hand in a last ditch effort to get back Eri. However, Eri's Quirk spreads near Chisaki, which causes his fusion with Rikiya Katsukame to become undone, returning Chisaki back to normal. Ochaco Uraraka apprehends the defeated Chisaki. Ryuko Tatsuma returns to the surface with Tamaki, Mirio, Shota, and Tsuyu and asks for a report on the situation; Ochaco explains that they have called an ambulance for Sir Nighteye and that Izuku has defeated Chisaki but his power is spiraling out of control. In reality, it is Eri's Quirk that is causing Izuku immense pain. Tsuyu lifts the injured Shota so that he can see Izuku. Shota, thinking that he is erasing Izuku's Quirk, disables Eri's Quirk. Eri and Izuku fall unconscious as their Quirks are deactivated. Ryuko orders to call for more ambulances and to confirm if there are anymore victims in the vicinity as well as search for any League of Villains members.
The Police Force and Heroes search the Eight Precepts of Death's underground hideout, capturing the defeated Eight Expendables as well as carrying the injured Heroes to the ambulances. Outside, Izuku hands over Eri to the paramedics, telling them that she has a fever ever since she lost consciousness. Before heading into an ambulance, Sir Nighteye is surprised that the future he saw has turned out differently. Sir Nighteye tells Izuku that he really did twist the future; Izuku rushes to Sir Nighteye and tells him that All Might said that he is alive and is ashamed to look at him in the eye. Izuku asks Sir Nighteye to hang on long enough for him to see All Might again. Sir Nighteye closes his eyes, replying to Izuku that many Heroes were injured to save one girl and, although he finds the situation difficult to be pleased with, thanks Izuku. At 9:15 AM, the Pro Heroes rescue operation to save Eri has been completed.
After Nighteye's death, Izuku went to see Mirio who he saw was still optimistic despite everything that occurred. Mirio explained it is his way of coping, he explains Nighteye's dying words are what causes him to smile. Recalling All Might's habit of this, Izuku went as far as to propose that Mirio could take Izuku's Quirk, indicating how Izuku believes that Mirio is truly the worthier candidate for One For All, like Nighteye had said. To his surprise, Mirio turned it down as he had faith that Eri might master her Quirk to restore his and believed in the words of Nighteye of being a hero.
After a mathematics class with Ectoplasm, Izuku, Ochaco, and Tenya prepare to go eat lunch. However, Aoyama suddenly approaches Izuku at that moment and puts a block of cheese in his mouth, surprising him. Izuku then states how his recent behavior left a strong impact on him, commenting that Aoyama was a man that he could never read. Later that night, Izuku is seen doing notes before going to sleep late as Aoyama stares at him through his window.
Aoyama watches a sleeping Izuku from the window before doing something outside and leaving the area. It turns out Izuku was aware of this and becomes scared by Yuga's strange behavior as he sees that the latter left him a message in cheese to says he knows something about Izuku while he is scared by its state. Izuku meets up with his friends though internally notes he couldn't sleep with Yuga's strange behavior keeping him up before the latter casually greets him, to his fear. In class, he notes he has not really talked to Yuga much and wonders about him as the attitude he has shown is contrast to his flamboyant and lively persona. During training, Izuku ignores Kirishima's request to train together since he wants to do so alone. Katsuki questions him on whether he has made any improvements in his Quirk but Izuku states he has not. Katsuki berates him for his lack of initiative, as he brings up Izuku's promise to surpass him before he leaves. Izuku is then called out by Yuga who shows him a new move he created though it causes him severe stomach problems. Seeing his state, Izuku asks the instructor for permission to Yuga away from to recuperate before he asks him what he meant in his message. Yuga explained that he is aware of Izuku not being accustomed to his Quirk as the latter wonders if he found out his secret. However, Yuga reveals that he went through a similar experience as he details his childhood of having to wear a belt to prevent his powers from leaking out and how he noticed it was similar to Izuku's initial lack of control of his before they both overcame it. He then tells Izuku that he is not alone in hardships as its better to face them together or they will not excel. Hearing these words, Izuku realizes that Yuga's actions were not meant to scare him but encourage him as he smiles and thank him for his support before Yuga suffers from another stomach problem. After this, Izuku and Yuga become good friends with some of the class noting on their frequent interactions.
At U.A. High School, Class 1-A chooses to make a band and dance performance for the School Festival. The lively Mina begins to show off her dance moves while her classmates including Izuku, are stunned by her skill. Izuku is shown holding and presumably skimming through his notebook while observing Mina's movement carefully, mumbling various facts on the subject to himself. He later looks up rather solemnly and states that he should try it out. Mina responds by calling Izuku over to teach him a move named two stepping, as a surprised and awkward-looking Izuku goes to join her. After everyone is in their seats, Aizawa announces the School Festival taking place soon, and the class is visibly amused.
Later, Izuku is excused by Aizawa to go visit Eri, explaining to the class that the request to visit was exclusively for Izuku and Mirio. Once the two are in the room, Izuku apologizes for not seeing her earlier, while Mirio offers her a fruit basket. After setting it aside, Eri tells Izuku that while she was being saved, she never knew his name. Izuku quickly states his full and hero name, tacking alongside that she could refer to him as Deku, as it was shorter and easier to pronounce. Eri then begins to blame herself for the severe injuries everyone involved sustained however, she is unaware that Sir Nighteye has passed away. Eri is guilty that Mirio lost his Quirk because of her, but Mirio tells Eri that she is not to blame and everyone is glad that she is safe, which comforts Eri. Suddenly, Izuku has an idea and asks Shota if Eri can come to the School Festival. Mirio explains to Eri that the School Festival is an occasion that U.A. High School hosts where there will be lots of events on display where people can enjoy themselves while tasting delicious food such as candied apples, which catches Eri's attention. As Shota calls Nezu to get his approval, Izuku asks Eri about his idea; Eri wants to get to know the people who saved her and agrees to go to the School Festival. Mirio comically adds on that he could take her on a supervised date, to which Izuku responds by curiously asking him what he meant.
Izuku and All Might are situated in the break room, conversing about the festival. All Might then asks Izuku why he wanted to meet at such a busy time, and Izuku starts telling him about his recent internship, stating that he could only muster up about 20% of his strength if he was under duress. He then monologues about how if Eri weren't there, his movements would have been too predictable and he would have been immobilized immediately. Izuku reveals that, against long range attacks, he was useless. All Might reacts by telling him that he should have long ranged attacks as well, while Izuku is flustered and instantly puts himself down. The scene then switches over to a forested area of the school grounds, where All Might begins to teach him by having him bring out Full Cowl. Izuku's stance allows him to unleash an attack from where he is positioned, and he unleashes a monstrous burst of wind, known as shoot style. All Might congratulates him, and asks him to rethink through his journey. Izuku looks back on the six major steps he has accomplished. All Might states that, once Izuku's maximum limit had passed 15%, he had wanted to tell him that he was not always bringing out 100%. Izuku is struck with realization, that if All Might had continuously moved at 100%, he would have caused a devastating windstorm in the surrounding area. Izuku realizes that he cannot move long at 20%, so at the moment of impact, that is when he should briefly release an amount close to his limit.
Izuku continues dancing practice with the dancing team for the School Festival, he confuses Mina's instructions and has to be corrected. Then Mirio arrives at U.A. escorting Eri for a visit to show her around. Izuku joins them and the trio walk around U.A. admiring what all the different groups of students are preparing for the Festival. He then asks Eri to come and watch him at the Festival and that they will all work extra hard to make sure she has fun. Very soon, Mina and the others tell him he is fired which shocks him.
Mina then tells Izuku what she means by fired is he is being switched over to the Staging Team from the Dancing Team, to help maneuver Yuga during his part of the presentation. He is selected since he and Yuga have been getting along as of late. Realizing he will still be able to perform, he accepts the change in position. Afterwards, he joins the rest of Class 1-A when Momo makes Golden Tips Imperial tea for all of them and Ochaco shows him a video about tea. Izuku sees the villain Gentle Criminal. Later on, he and All Might are out training in the forest before Mei Hatsume appears while following one of her gadgets, that All Might caught. Izuku is noticed by Mei who tells him the item that he requested is similar to one of her inventions and is customizing it for his use, to which he thanks her.
The night before the festival, Class 1-A practice their routine but are accosted by Hound Dog who tells them it is late and they should be in bed. They go back to their dorm and there Yuga and Izuku find that the rope they will be using to suspend Yuga in mid-air for his part in the routine is now frayed. Not wishing to disturb Momo who had gone to sleep, Izuku says he will go buy a new rope from a store early next morning, as he also has something else he wants to pick up. Early next morning, Izuku is training when appears to tell him his new gloves (she had designed for him to use Shoot Style with) are complete and gives them to him. He is given the instruction manual for them and thanks Mei before she runs off. He rushes to the market and gets the items he needed. On his way back he runs into the disguised duo of Gentle Criminal and La Brava. Izuku recognizes Gentle from the videos he watched with Ochaco and begs him not to attack the festival.
He is praised for figuring out the villains' identity and charges at Gentle but suddenly stops moving as he has run into an elastic sheet. Gentle reveals his Quirk's abilities. Gentle uses Gently Rebound on Izuku which blasts him across the street, as he comments on his dislike for using violence to solve his problems. As Gentle and La Brava attempt to make their escape, Izuku charges at them. Gentle turns around and uses his Quirk on the ground and Izuku gets caught by Gentle's Gently Trampoline and is shot into the air. He is recognized by the villains from U.A.'s Sports Festival as Gentle decides to end the fight and quickly infiltrate U.A. Izuku charges Gentle and smashes him into a construction building.
Izuku charges at a fleeing Gentle, until the latter starts bouncing around Izuku at great speed by turning the construction beams around him into elastic. Gentle uses his Quirk and turns a crane's hook into elastic, planning to slingshot himself and La Brava out of the construction site. Having sling shot themselves from the construction site and flying towards U.A. Using his enhanced strength, Izuku fires an attack at Gentle and La Brava. Gentle dodges Izuku's attack and notes his tenacity.
As the villains retreat from the construction site, Izuku appears above them. Charging at them with super speed, Izuku manages to pin them both down on the ground. Unfortunately, La Brava uses her Quirk to grant Gentle a power up to overwhelm Izuku. Gentle delivers an attack to Izuku but the latter is unaffected.
When they are knocked back by Izuku's attack, Gentle refers to him as incorrigible. Gentle attacks Izuku with Gently Sandwich claiming he must fulfill his fleeting dream. Revealing the more he tells him to give up the more determined he becomes. Izuku asks the villain why he is targeting the festival, Gentle responds that there is no other way if he is to achieve his dream. Izuku gets up and tries to throw him but is rebounded. They then proceed to clash with each other.
Izuku and Gentle clash with La Brava cheering Gentle on. Izuku is beginning to become overpowered by Gentle's enhanced strength which Izuku correctly assumes to be the work of La Brava's Quirk. Gentle asks Izuku why he aspires to become a Hero. Izuku answers that just like Gentle his dream is no longer his and will achieve his dream for the sake of those who believed in him, wanting to be the man who shows everyone a brighter future. Izuku's response brings a smile to Gentle's face. As Gentle knocks back Izuku, La Brava takes the opportunity and brings out her computer and using special wireless technology plans to hack into U.A.'s internal network to disarm its security. However, La Brava is out of range and moves closer.
Izuku sees this but Gentle plans on keeping Izuku occupied longer; Gentle jumps from his aerial elastic barrier and lunges into Izuku although he manages to keep his guard up mitigating the damage. Gentle creates several aerial elastic barriers and jumps from them all over the vicinity hitting Izuku and knocking him down. Gentle yells that he will discard his reputation and style of fighting to defeat Izuku, having developed respect for the boy.
On the ground, Izuku launches several wind pressure attacks which Gentle manages to evade most of but is hit by one of them. Gentle loses his balance and is stunned as a result of Izuku's wind pressure attack. Using this opportunity, Izuku jumps in front of Gentle and attacks him with Shoot Style: St. Louis Smash. The strength of Izuku's St. Louis Smash is enough to finally bring down Gentle and renders him immobile. Izuku apprehends Gentle and admits that out of all the battles he has fought, the one with him has been the toughest so far.
Izuku watches as La Brava returns to the area and sees that he has been defeated by Izuku as Gentle orders her to run away. A flabbergasted La Brava instead demands Izuku to let Gentle go and while hitting Izuku, yells that Gentle poured his heart and soul into their U.A. infiltration plan and that she is unable to live without him. Gentle musters up the remaining strength given to him by La Brava's Quirk and pushes Izuku off and into the air, using his Quirk to bounce Izuku away. Gentle hugs La Brava as he tells Izuku to fly away as Hound Dog and the Ectoplasm clones who were alerted of the battle detain Gentle and La Brava.
Arriving at the Festival, Izuku is reprimanded by Hound Dog for his recklessness before he is told to clean up and have fun. Izuku performs in the dance and is able to see Eri at the show. As Izuku performs, he is able to see her laughing for the first time and is happy he kept his promise.
Later on, Izuku speaks to Eri as she states she enjoyed the performance but could not find a candied apple. However, her disappointment turns to joy when Izuku gives her one as he stated he got the recipe and made one himself. Grateful and happy, Eri enjoys the gift while he smiles at her.
As November comes to a close, Izuku, Ochaco, Tsuyu and Eijiro are informed by Shota Aizawa that Eri will be taken in by the school. Shota states that's because she does not have anyone who can take care of her and he is the only one who can prevent her Quirk from going out of control again. Izuku listened to Mirio explain the growth of her horn and states he will also hel Aizawa to monitor her and welcomes Class 1-A to visit her once in a while since they will all be busy.
Then, Shota tells his students to return to their dormitories as they will have visitors. Afterwards, Izuku and his class meet the Pussycats again when they visit U.A., Izuku is happy to see Kota again. He thanks him for the letter by stating he treasured it. Mandalay points out the new shoes Kota has to Izuku, which look exactly like Izuku's shoes. Kota becomes embarrassed after Izuku points out the match.
The reason for the visit is to celebrate Ragdoll's reinstatement. Izuku thought that Ragdoll was on break from active duty, to which she states that she plans on supporting the Pussycats as a secretary. The Pussycats received a message from Tartarus regarding All For One. The villain reveals that once he has stolen a Quirk, he keeps it for himself because he feels the need to use it. That's why you can not return it. Tartarus has been investigating the number of Quirks All For One has and how long he was been keeping them.
Later, at the U.A. dorms, Izuku and his classmates watch a television report of a Nomu attack in the city and are horrified as it shows Endeavor being overwhelmed by Hood's attack. A worried Izuku looks to Shoto who walks into the room to watch the scene of his injured father laying defeated. Izuku continues to watch as Endeavor battles the Nomu and sustains more injuries before launching a counter attack. Izuku then sees Endeavor take down the Nomu and stand proud before watching as a relieved Shoto fell to his knees.
Not long after, Izuku is exhausted from training and falls asleep. He experiences a dream where he sees the previous users of One For All, more clearly than he had before. Izuku see's a flashback of All For One and his brother, the first user of One For All. He sees the events that led to the creation of One For All. Much to Izuku's shock, it is revealed that the first user had intentionally shared his memory with him. When the first user interacts with him, Izuku realizes that he is experiencing something All Might had told him was impossible. The brother notes he wanted to show Izuku more but Izuku's current level won't permit it, though he assures Izuku that he is not alone, and the latter wakes up. Izuku is found on the floor by Yuga Aoyama who finds the room a mess and Izuku with a glowing arm.
Following his dream, Izuku is questioned by Yuga on the state of his room but he excuses it and goes on a jog, unable to fall back asleep after his dream. He recalls the last part of his dream, when All For One's brother reached out to touch his hand and all of the past users of One For All were looking directly at him.
He later meets All Might in the U.A. nap room the next day, and Izuku tells him about his dream. All Might tells Izuku that he also experienced similar visions. His master told him that they are vestigial remnants of the prior generations of One For All rather than the usual simple dreams. He also tells Izuku that she taught him the impossibility of the prior generations communicating with him, which likely makes Izuku the first user of One For All to experience this phenomenon.
However, All Might recalls a discussion with his master, where she told him that even if she dies, they will meet again within One For All. Izuku asks All Might about what All For One's brother meant by the "singularity"; after another question about the fuzzy appearance of All Might and two other prior users in the dream, All Might tells Izuku that he truly does not understand what happened that well and they should search for answers together. Izuku agrees to try his best and tells All Might that his master was very beautiful.
Izuku and All Might soon encounter Shota and Hitoshi leaving the neighboring room. Izuku excitedly greats Hitoshi, mentioning that he saw him with Shota before. Hitoshi smiles at Izuku, and confirms his memory. Shota tells Izuku to get ready, as they have a busy day.
Izuku and he rest Class 1-A group up in the industrial training area from the final exams. Izuku spoke with Katsuki on his costume changes, and starts to theorize on why he has made the changes he did, putting Katsuki into a rage. Mashirao comments on Izuku's costume, bringing up the glove upgrade that Mei made for him before the U.A. School Festival. Izuku then witnesses the arrival of Class 1-B, claiming that the momentum is now moving to their side. Izuku then hears Shota and Sekijiro tell the two classes they will have a special guest: Hitoshi Shinso, who is trying to transfer to the Hero course.
During joint training with Class 1-B while paired with Mina, Ochaco and Mineta, Izuku's arm once again glows as One For All goes berserk and he shoots out black energy tendrils. Unable to control the new sensation, Izuku orders for everyone to take cover while he struggles in pain, but Ochaco clings to Izuku and has Hitoshi use his Brainwashing to save him from being absorbed into the black energy created by One For All.
Hitoshi removes his mask and asks Izuku if they can have their proper rematch. Hearing this Izuku confirms the offer and allows himself to fall under Hitoshi's spell once again. The mysterious black power disappears as he loses consciousness and his powers deactivate. While unconscious, he finds himself in an unknown area and hears a loud voice calling him, revealed to be one of the former users of One For All; a bald man wearing goggles and a black jacket with a silver belt. The user tells Izuku that although his Quirk has finally manifested, he's using it in a wrong way. Izuku is also told that he needs to stop activating his power with such as idle thoughts. The man then encourages Izuku to try harder to control the Quirk.
The previous One For All wielder continues the lecture he was giving Izuku. He tells him not to give up, and then proceeds to inform him that the black tendrils he was emitting earlier in the match were actually the manifestation of the previous One For All wielder's Quirk, Blackwhip. The reason it suddenly appeared is because Izuku was thinking about how he wanted to capture Neito Monoma, fitting the nature of the Quirk perfectly and so causing it to appear. He also explains that the Quirk factors of all the previous wielders have been inside One For All for a long time, dormant, in the small core of the Quirk. He says that this core has started expanding and growing larger, and that the same is also happening to One For All itself. The successor also says that its strength has also been increased due to the power of One For All, and, after he tells Izuku to do his best, and that all the predecessors are there with him and are supporting him, he vanishes.
Ochaco immediately shakes Izuku to wake him from the brainwashing. Ochaco calms Izuku down as they float in mid-air, Izuku expresses shock and concern for her injuries and what has transpired. Neito takes advantage of their guard being down and ambushes Izuku from behind while floating on an enlarged metal nut, attempting to touch him and copy his Quirk. He manages to knock Izuku over and Ochaco tries to subdue him using Gunhead Martial Arts.
Reiko arrives in time and saves Neito by using flying projectiles to distract his attacker. Ochaco dodges as everyone from both teams join the fray, the once technical battle turning into an all-out brawl. Hitoshi sends his Capturing Weapon flying at Ochaco, but Izuku darts out in front of her and grabs it, ready to face Hitoshi once again. Despite Izuku's chaotic outburst, all of the students are still eager to win the fight. Izuku explains to Ochaco that he can't use his Quirk after what happened earlier, saying he'll have to rely on her powers to aid him against Hitoshi.
Neito throws a projectile at Izuku and Ochaco, but the latter deflects it with her wrist-guard. As Neito's touched Izuku and therefore copied his Quirk, he attempts to activate One For All but it doesn't appear to work, allowing Ochaco to jump on him and swiftly pin him down.
Hitoshi realizes his teammate's been caught and calls out to him, readying his binding cloth to use to support Neito, but Izuku uses Ochaco's Quirk to float up to his position above the battlefield, distracting him from his captured teammate. They both start grappling and Hitoshi reminds Izuku of their last bout, and Izuku knows Hitoshi is too big of a threat not to neutralize now. Hitoshi claims he's not the same as before and tries to bring the pipes down on Izuku the same way he did in round one.
Izuku recalls the short time he spent in One For All after falling under Hitoshi's brainwashing. He spoke to a former One For All user and was told to use his new Quirk, Blackwhip, by keeping his heart under control. This man reminded Izuku of All Might, and that gives him enough heart to focus and use the black tendrils to suspend the pipes in the air.
Hitoshi is surprised by this new development and asks if Izuku was only faking being in pain before. Izuku suddenly gets some painful physical backlash for using Blackwhip, realizing his body isn't ready for its power yet and he must master One For All first. To avoid another outburst, Izuku adjusts full cowl to 8%.
Izuku spins off a wall to completely evade Hitoshi's Capturing Weapon. He remembers his origin and this gives him enough courage to use his Quirk without fear. Ochaco chops Reiko's neck to subdue her from behind and then pushes Yui into a trap made of Minoru's balls, which gives Mina an opening to uppercut Nirengeki to save Minoru. At the same time, Izuku pins down Hitoshi, reminding his team of the claim for a victory that he made before the match began.
Class 1-A’s team manages to turn the battle around as soon Nirengeki, Reiko and Hitoshi have soon joined Neito in the cell. Midnight reveals that Class 1-A won the battle overall and the winners celebrate their victory, leaving the losing class to lament over their loss.
Before adjourning, Shota questions Izuku about the new move he used with everyone else interested too. Izuku claims that he isn’t sure what it was, describing how his power overflowed and saying that he didn’t know why the tendrils suddenly appeared. He thanks Hitoshi and Ochaco for saving him, Midnight continues the feedback by commending Hitoshi and Ochaco's heroism, mentioning how it "turns her on" in terms of excitement and passion. Mina also adds on that Ochaco did latch herself onto Izuku's body to prevent him from losing control. Both Izuku and Ochaco began to blush rapidly in embarrassment.
However, Hitoshi reveals that he didn't save Izuku out of benevolence nor Ochaco's orders, but only because he wanted to fight his old rival and win a satisfying victory. As Hitoshi admits that he acted on his own desires, Shota proceeds to scold his pupil, much to the shock of Izuku and Ochaco. Shota points out that everyone in the Hero Course trained hard to become a hero, and they can't help others if they don't have the will to act on their own, commending Hitoshi for demonstrating the demeanor of a real hero. Izuku follows on by praising the hero-in-training on his skills throughout the exercise, mentioning how his new equipment gave him an upper hand in taking down opponents with no ease. Izuku also feels like he hasn't made himself reliable just yet. Vlad King then announces before providing feedback to the other students that Hitoshi will be joining the Hero department starting from his second year.
Neito begins to rant about how, although they lost the match, his team didn’t lose in terms of substance, revealing his newfound knowledge of Izuku’s Quirk. He implies that he could easily beat Izuku if they were to rematch, Vlad King patiently explaining that, as class has ended, they won’t be doing another joint training match anytime soon. Izuku wonders how Neito obtained the details of his ability. Shota interrupts Neito's monologue by requesting him to come over Class 1-A's dormitories to visit Eri next day.
Later, he has a conversation with All Might and Katsuki about the Blackwhip. Katsuki asks All Might how he knew about using previous wielders' Quirk, but All Might admits that he knows nothing. Then he asks Izuku if there was a trigger that caused Blackwhip to manifest, but the latter denies and wondering if there could've been some form of external catalyst. Katsuki theorizes that maybe this turn of events has anything to do with All For One.
Around 7:00 PM at evening, Izuku and Katsuki engage in a sparring match at Gym Gamma to activate the Blackwhip ability, but nothing happens, so All Might stops the fight, and Izuku and Katsuki return to their dormitories, where the students of Class 1-A mingle with the students of Class 1-B. Once there, Shoto stops to converse with him by asking Izuku if he has two Quirks like him and if he was still hiding his power during his fight at the Sport Festival. Izuku hurriedly replies that the black tendrils might be an extension of his original Quirk, and he wasn't holding back against him. Shoto believes him.
The next day, Eri, Izuku, Mirio and Neito are standing outside the teaching staff dormitories. Shota wants Neito to copy Eri's Rewind Quirk, and Deku and Mirio are with her because he does not want to leave Eri alone with Neito, as his eccentric personality would be bad for her mental health.
Inside the building, Neito attempts to copy Eri's Rewind Quirk. He grows the horn that is required for its usage, but says that he is incapable of using the Quirk itself and apologizes for this to Shota. When Mirio and Izuku question the reasons Neito explains that Rewind is an accumulation-type Quirk. He can copy the fundamental abilities of a Quirk, not something requiring stored-up energy as he cannot copy what has already been stored. This is why he could not use Deku's quirk after copying it, because is an accumulation-type Quirk too. Izuku is relieved that he has this mechanism as it prevented him from being damaged by One For All.
Shota explains to Mirio and Izuku that as Eri doesn't understand how to properly use her power, he hoped that Neito's Copy Quirk would help her and make it easier for her to learn it as well. Eri feels sad and apologizes for causing everyone trouble, saying everyone would be better off if she didn't have her ability, but Izuku reminds her that it was her power that saved him, stating that what she said is not true at all. He explains that what power is worth is all about how it's used, comparing it to how a knife is dangerous initially, but when used right can make all kinds of food, and saying that her power is an amazing one. These words encourage Eri, and she says that she'll try her best after all. Internally, Izuku promises himself that he'll master One For All.