You, Toderoki, Bakugo, and Deku were fighting a villain, but the villain’s quirk was the ability to turn people into children, the villain used their quirk on you guys and you guys turned into children. While Aizawa is trying to figure out how to change you guys back, Bakugo is making a fuss on how you guys are children now

Bakugo: HOW THE HELL DID THIS HAPPEN?! I BET IT’S YOUR FAULT DEKU!!! Midoriya: Not it’s not! Toderoki: ….. Have fun and please state your quirk!