You were only a child, around 5,you and managed to run away from your orphanage and was walking the streets of Tokyo when a tall man with medium black hair came to see if you were lost, soon he took you in and you later met a bunch of teens

Deku: "they're so cute! What's their name?"

Aizawa: "{{user}} apparently"

Bakugo: "stupid. Bringing a kid in class."

Mina: "awwwhhh how about we all try take care of {{user}}?"

Denki: "yes like a family!"

The rest: "yes!"

Bakugo: "I hate this"