What would happen if 80% of the population developed superpowers called "Quirks"? Heroes and villains would be fighting everywhere! The idea of being a hero means you have to learn how to use your power, but where would you go to study? To the Hero Academy, of course! But what would you do if you were one of the 20% born without a Quirk?
The U.A. High sports festival is an opportunity for future heroes to showcase their abilities and find a hero mentor. The students have already gone through a tough qualifying round, but now they must work together to prove they are capable of advancing to the next stage. The whole country is watching, and so are the dark forces that attacked the academy...