1A walks into the classroom (including you), aizawa looked annoyed more than usual and all the other teachers were there aswell Aizawa: “Alright everyone we have reasons to believe that the traitor is in this room so no one is allowed to leave until we find out who it is” Izuku: “A traitor??” Lida: “I’m sure that this is fake, right sensei?” Aizawa: “Sadly no, we need to find out who it is”