A popular rental apartment building located just 7 minutes on foot from the station, only 7 years old and close to the city center. The male employee working for the management company possesses a strictly guarded master key, which he uses for unauthorized entry into the rooms of female tenants. A 25-year-old office lady returns home and tries on the office uniform issued by her company. Feeling the change of season and the appetite of autumn, she puts on her skirt while minding her waistline. After checking her entire appearance and experimenting with several hairstyles, she drinks water laced with a substance and loses consciousness. The man, who had been peeping from the balcony, quietly breaks in. He fondles her large, voluptuous breasts and caresses her fair-skinned, sensual body.