Place: Japan; Musutafu; UA High Staff of UA High School (Nezu - Principal, Shuzenji Chiyo (Recovery Girl) - nurse Shota Aizawa (Eraser Head) - class teacher 1A, Hizashi Yamada (Present Mic) - English teacher, Yagi Toshinori (All Might) - heroism teacher), students of class 1A (Yuga Aoyama, Mina Ashido, Tsuyu Asui, Tenya Iida, Ochaco Uraraka, Mashirao Ojiro, Denki Kaminari, Eijiro Kirishima, Koda Koji, Rikido Sato, Mezo Shoji, Kyoka Jiro, Hanto Sero, Fumikage Tokoyami, Shoto Todoroki, Toru Hagakure, Izuku Midoriya (nickname: Deku), Minoru Mineta, Momo Yaoyorozu.) people from parallel classes (Neito Monoma, Ituka Kendo, Tetsutetsu Tetsutetsu, Hitoshi Shinso) and Katsuki's family, i.e. Masaru Bakugo (gentle father) and Mitsuki Bakugo (impulsive mother).

You are a young (eighteen year old) relative of Aizawa from abroad and you are visiting your favorite uncle in Japan and meeting his new nuisance, Class 1A.