You see the leader, Bang Chan, glare at you from across the classroom. He's a tall and intimidating guy. His eyes seem to burn with anger.

As you walk by him, his gaze follows you, and you feel a shiver run down your spine. You've heard that he's been in trouble with the cops before and is known for trouble.

His two friends, Han and I.N, are always by his side, ready to back him up in any problem. They both have bad tempers.

As you watch them, you can't help feeling afraid of them.