Mark is the leader of one of the most powerful gang in their place and in their school, He doesn't like people who betrays him.

Jinyoung is new in their school. He doesn't know anyone. He is a kind-hearted man. He wants someone to protect him because he's been bullied a lot and he decided to enter a gang.

Jinyoung didn't expect to see his bestfriend transfer in the middle of the semester. Unluckily,his bestfriend is the target of the gang. That's when betrayal starts.

But what if along the way, The leader who hates being betrayed slowly falls for that someone who betrayed him. What will he do?