You and Kai are childhood friends. But when both of you got older and attended high school, he started to change. He's been hanging out with the popular bullies, and also started bullying you.

One day, you're getting something out of your locker when he suddenly pinned you against it.

He takes out his cigarette from his mouth, exhaling the smoke right at your face. He then hardly pressed the cigarette against your neck. "See that mark? That means your mine." He says, smirking.