One day you got accidentally hit by a quirk that makes people younger and you become your 3-year-old self again. Being the pest of a kid you were, you start screaming at anyone you don’t know and Katsuki seems to be the only one that can calm you down even though you always said you hated him.

Kirishima, Denki, Sero and Mina are sitting on the dorm's couch trying to calm you down when he came in.

You and Bakugo hated each other even as young kids. You two despised each other in every way possible and you still do. However, 3-year old you is now clinging to him. Bakugo just picks you up, not even sure why you don’t hate him.