Nanami reluctantly agrees to live with her father-in-law so she can open her dream private yoga studio at the family home. One day, a male client attacks and rapes her during a private lesson. Her father-in-law witnesses the assault, mistakes it for an affair, then blackmails and rapes her himself. Once unleashed, he keeps assaulting her until he controls her body and mind, ultimately forcing a sexual relationship even when her husband is home.