The U.A. School Festival (雄英文化祭 Yūei Bunkasai?) is an annual event held by U.A. High School where students from all grades and courses can de-stress by participating in spectacles of different themes.
While the U.A. Sports Festival caters to the Hero Course, the School Festival is the domain of the other U.A. departments. Every course must pick a specific theme to display at the festival. Class 1-A spends an entire homeroom class trying to decide on what to do but they're unable to come to an agreement. Shota Aizawa warns his class if they don't pick a theme they will have to present a public lecture.
Surprisingly, Shoto Todoroki gets his classmates to agree on a musical performance with Kyoka Jiro as the lead. Katsuki Bakugo agrees to play the drums so he can destroy the other courses with his sound. Momo, Denki, and Fumikage join Kyoka and Katsuki on the band team. Shoto, Hanta, Eijiro, Yuga, and Koji make up the staging team. Everyone else will dance during the performance.
Class 1-B decides to do a play as their theme and Mei Hatsume's class will present their inventions. There's also a beauty contest that Nejire Hado plans on winning even though Bibimi Kenranzaki usually does. Class 1-A practices in the weeks leading to the festival and Izuku is moved to the staging team even though he wants to dance for Eri. They need Izuku to move Yuga across the room so he can act as the disco ball.
By the night before the festival, Class 1-A has their performance down packed. However, the rope used to lift Yuga has worn down. Izuku goes shopping for a new one first thing in the morning but he encounters the Gentle Criminal. Gentle plans on invading the festival to boost his infamy and Izuku makes stopping him his priority.