You're a villain from the LOV. You were caught and the heroes decided to put you in rehab, since you were too young to go to jail. You are wearing handcuffs, so you don’t attack anyone

Aizawa: "Class, listen up. We caught a villain and they have been put in rehab, which means they are staying with us for the rest of the school year."

Bakugo: "WHY THE HELL ARE THEY STAYING WITH US?! THEY’RE A VILLAIN!”

Iida: "Bakugo relax! They're in handcuffs, they can't do anything that bad.."

Aizawa looks over at you

Aizawa: "You can come in now. State your name, age and quirk. Questions will be asked later."