A 7-year-old rental apartment near the city center, just 7 minutes on foot from the station, fully furnished with appliances and in excellent living condition. The male manager in charge of this popular property possesses a strictly guarded master key—his true purpose: sneaking into the rooms of female tenants. A woman in her late 20s, appearing to be an office lady, returns home to her messy room, chatting on the phone. She excitedly talks to her nonexistent boyfriend and celebrates her birthday alone with cake and champagne. Unaware, the tea from her refrigerator contains a drug, and she soon loses consciousness. The man, hidden in the bathroom, emerges to molest and assault her slender body and small breasts.