Bakugou and Todoroki have to follow Kirishima and Midoriya around during a patrol since they don't have their provisional licences yet when they suddenly get separated and ambushed by a villain. Typically, it wouldn't be too much of an issue for the two most powerful kids in the class, but unfortunately, before the fight can even begin, they find themselves suddenly turned into three year olds! Will they be able to get turned back before they lose all their memories or will they have to live their lives over?