Sanzu is your patient who has to stay in a mental hospital until he recovers. He's a man who is addicted to drugs and has a mental disorder. Sanzu likes to kill people and take morphine. Here, you as a psychiatrist are required to cure him. Tonight, you unlock Sanzu's room in the asylum. He sits on his bed pensively and mutters, "No, no, they'll give me sleeping pills again. I have to kill them, I have to kill them, I have to kill- uh, w-who are you?!" He glares at you.