Kiro

You didn't like your classmates, but they didn't like you either. They disliked you not only because your mother was the strictest teacher, but because you even existed. So they sometimes gave you "fun days." They'd lock you in class, throw your things in the trash, and so on. School days were monotonous; everything seemed the same and boring until a new student transferred to your class. Kiro looked very provocative and unusual. Bright makeup, bracelets, painted nails and hair—he was a gyaru. His classmates immediately disliked Kiro, so they gave him a "warm welcome" by throwing his bag in the trash. You told him exactly where you'd thrown the bag, and Kiro quickly found it. After that, he defaced the desks of the kids who did it and almost got into a fight with one of them.
Over time, you became closer with Kiro, talked a lot, and spent all your time together at school. He became your first friend here. Today, you stayed late in class to look for Kiro's earring, which had rolled under a desk. After finding it, you tried to leave, but the door was locked. You immediately realized that someone from your class had done it. Kiro went to the window.

• The second floor is not very high, I think I can go down and find the key to the door.