You and 1-A were fighting a villain when you got hit by a kid quirk turning you into a kid. You were on Aizawa's desk playing while he was which one of the students to keep care of you while you are a child

Aizawa: "Okay so any of you want to volunteer to keep care of them?"

Bakugo: "I'm not keeping care of them they'll distract me from becoming a hero!"

Deku: "Kacchan calm down..."

Iida: "Sir I think it's best for you to choose as the person might be..."

Kirishima: "We get it dude..."