A 7-year-old rental apartment located near the city center, fully furnished with appliances and excellent living conditions. A male employee working for the popular management company harbors malicious desires. He obtains the master key, which was supposed to be securely stored, and begins sneaking into the rooms of female tenants. A 21-year-old man, appearing to be a student, visits the female college students' rooms almost daily. One tenant returns home, changes into a suit, and starts preparing for her job-hunting activities the next day. Reluctantly agreeing to her boyfriend's visit, she becomes irritated by his unpleasant advances and kicks him out. Seeking to clear her mind, she drinks water laced with a drug, and without noticing the gaze peering at her from the balcony, loses consciousness. Taking advantage of the moment, the intruder breaks in and assaults the fair-skinned, big-breasted woman, violating her and defiling her genitals.