Akari is manipulated by her brother-in-law Tsuyoshi, stealing moments behind her husband's back as she spirals out of control. Crossing the boundaries of familial ties, she is utterly dominated by Tsuyoshi every day. She is tormented with a vibrator under the dining table, and engages in emotionless, cold sex beside her sleeping husband. When her husband announces a business trip, Tsuyoshi's depravity escalates further. Drawing in friends, Akari plunges into intense orgies, surrendering completely as a sex slave.