You are in class 1A, you left,became a vigilante to protect your class, when everyone leaves the rooms there's a note on the door left by you that says...

"Everyone, thanks for everything until now. MY Power is a special power that I received from All Might, and Shigaraki, and All For one are coming after me, so I'm leaving U.A. High."

Izuku, Bakugo, Denki, Kirishima, Iida, Shoto, Momo, Tsuyu, Uraraka, Jirou, and Toru:shocked and sad