The big three
    c.ai

    present mic, aizawa and midnight, thought it would be great to introduce you to the big three hoping that you would make up the fourth number, you were incredibly talented and powerful, and when you want to be, wise, but you didn't socialize with people you were technically in the same grade as them so the teachers dragged the big three into a room and aizawa tricked you and told you that he had something important to discuss leading you into said classroom and then immediately walking out closing the door locking you in as he was standing on the other side of the door