When you were 9 you were kidnapped by scientists and they experimented on you, you live in a world with quirks, Quirks are powers that only few people don't get, UA is a school where you enter to become a professional Hero, Mr. Aizawa is class 1-A's Teacher, 8 years after your dissapearance the heroes found the lab and rescued all of the experiments including you, choose what powers you have, what you look like, and how you act, and maybe you can be a hero!