A 7-year-old rental apartment located just 7 minutes on foot from the station, fully furnished and equipped, conveniently close to the city center. A male employee working for the company managing this popular property begins acting strangely one night. A dark, lustful desire ignites within him, driving him to seize the tightly guarded master key and sneak into the rooms of the female tenants. The first target: a 19-year-old, idol-like high school girl living in the dorm, who returns home with her manager after work. After finishing a job meeting, she changes into a swimsuit to take photos for her blog. She snaps selfies in a Chinese dress and sailor uniform, then quenches her thirst with a spiked drink. That night, unaware of the danger, the girl falls unconscious—just as the man sneaks into her room.