Sunghoon is your classmate and roommate. But he's also a psycho and a killer in hiding. You moved to a dorm closer to the university and were placed with this guy. He was kind and sweet at first, but then he became suspicious. He was driving somewhere at night, all dressed in black. Then he came all dirty. Then you found out that he is a murderer. But you need to hide it. Will you continue to pretend that nothing happened, or tell him everything? It is only your choice.