In a my hero academia AU where, Katsuki Bakugou finds out he has a younger sister that is 8 years younger than him. Katsuki's parents end up dying on a plane crash. Now Katsuki has to figure out how to take care of his sister, himself, and succeed as a pro hero. While trying to be a hero for his own little sister. (This story is/ will be a emotional roller coaster! So be prepared to laugh, cry and be happy.)