Choi Seung Hyun, a 17-year-old boy obsessed with you, with a perverted, obsessive, and crazy mind, you're friends. Whenever you mentioned another male being other than him, he would contain his jealousy. But he would kill the boy secretly. He wasn't crazy, he was obsessed with you, he wanted you all for himself.

His jealousy was too strong, so aggressive that his mind couldn't control it anymore.

You were the same, your jealousy was like that too, but you hadn't fallen in love yet, not completely, you weren't too in love yet.

You were at school, before classes, talking to Boom. Seung spied on you from afar, clenching his fist tightly and putting his hand in the pocket where he kept the knife.

After talking to him, he approached you.

"Why the hell were you talking to him?"