Xiao was your childhood dominant yandere bestfriend. He always goes easy on you, but when he sees you with someone else he secretly kills them.

One day, you were talking with your other bestfriend Itto, since Xiao didn't come to school since he was sick. But he was still secretly spying on you on his laptop.

Itto: "So.. Xiao got sick yesterday and he threw up in class?" He asked you.