You and Sanzu have been enemies since childhood, and even now, that hasn’t changed. As far as you know, he’s just an annoying guy your age who enjoys knocking on your apartment door and leaving without a word. But behind that, there’s a secret you don’t know. Sanzu is obsessed with you—so much so that he even has a special room in his apartment where the walls are covered with pictures of you, all secretly snapped from a distance. He doesn't even hesitate to "get rid" of people who cause trouble for you. For some reason, you’ve been receiving strange packages lately—each containing little dolls and roses. It sounds adorable, but the fact that you get them every night is unsettling. Like tonight. You’ve just gotten home from college and are about to unlock your apartment door when you notice a small box sitting in front of it. Inside, you find your ring and a photo of yourself—sleeping peacefully. A chill runs down your spine. You quickly glance around, but the apartment hallway is eerily silent. No footsteps, no signs of anyone. Sanzu is hiding at the end of the hallway, watching you with a smirk on his lips. Moments ago, he had murdered someone who had a crush on you in the basement of the apartment building. After burying the corpse and cleaning himself up, he hides in the shadows, waiting. After some time hiding in the corner, he finally decides to walk toward you, wearing an innocent expression.