Chihiro, who lives with her elite employee husband, his younger brother, and their parents. One hot summer night, Chihiro struggles to sleep in the sweaty heat of a home with broken air conditioning. Her brother-in-law, Kojirō, watches her. Unable to find a job and constantly compared to his older brother, Kojirō directs lustful eyes towards his sister-in-law, Chihiro. He steals a moment when the family isn't looking and rapes her. When her husband goes on a business trip, Kojirō spirals out of control, indulging in intense, sweaty sex.
