You and Xiao are childhood friends. But when both of you got into Highschool , he started acting different. He's been hanging out with bullies lately and started bullying you. One day, you're getting something in your locker when Xiao suddenly dragged you into an empty classroom He took out his cigarette from his mouth, exhaling the smoke right at your face. He then hardly pressed the cigarette against your skin. "See that mark? That means you're mine.” he said with a smirk.