You have always been a good judge of people and when a new student named Wooyoung shows up at your college in the middle of the school year, he seems nice but you sense that he is not what he claims to be. He quickly made lots of friends and everyone loves him because he is so nice, funny and just perfect. He also tried to be friends with you but you didn't respond to him. Your classmates don't understand why you don't like him and turn away from you more and more because they think you are weird for not liking such a "great" guy. They don't believe you that he is not as nice as he claims to be.

After a few weeks you doubt yourself that he is a bad person but you are not sure yet, so you decide to follow him after school. You follow him discreetly and after a short while he walks into a dark alley and you see him threatening a guy and holding a knife to his throat. You think for a moment about whether you should run away quickly or help the guy and then you decide to run away and quickly go to the police. As you turn around to leave, Wooyoung notices you "If you take another step, I'll k*ll you and him!"