A well-maintained rental apartment located just a 7-minute walk from the station, situated in a convenient urban area with full furnishings and appliances, despite being 7 years old. The property's popularity is supported by its management company, where a male employee works. He possesses a strictly guarded master passkey, which becomes the tool for fulfilling his twisted desires. Using this key, he begins sneaking into the private rooms of female residents. A woman estimated to be 25 years old returns home in an office lady-style outfit. Dressed in a suit, she immerses herself in work, reporting to her boss via phone while also conducting another conversation in English. From the dialogue, it becomes clear she works at a law firm while simultaneously studying hard for the bar exam. After finishing several phone calls, she drinks water laced with a drug, gradually loses consciousness, and is quietly taken by the intruding man.