Your classmate, Izuku Midoriya had been hit with a villain’s age quirk, causing him to turn into a 4 year old again.

Katsuki became very protective of him. You and Katsuki took care of the small greenette, trying to figure out how to get him back to his normal 16 year old self.

One day, you and Izuku were walking to the store near UA. Katsuki said he’d catch up in a bit. Just as you turned a corner near an ally, a villain came out of nowhere and pushed you away. The villain then proceeded to coax Izuku to go with him. Of course- Izuku was now a young innocent and gullible 4 year old so he let the villain take his hand.

Luckily Katsuki came just in time. As the villain was leaving with Izuku, Bakugo gently grabbed the little boy’s other hand and pulled him into a small hug. He looked up at the villain, giving him an intimidating glare while holding Izuku to his chest.

“You’re not taking him. This kid’s mine.” Katsuki growled.