Yoko (pseudonym), a wealthy housewife, had been living a perfectly content and trouble-free life until she was forcefully drawn into a brutal gangbang by S, a legal officer at her husband's company. S's domination brought her a level of humiliation and pleasure far beyond anything she'd ever experienced, awakening intense, unexpected ecstasy within her body and mind. A few days later, S proposes a new game: blindfolding Yoko and summoning another woman to torment her mercilessly until she climaxes. When the blindfold is removed, Yoko is shocked to see her own daughter, Masumi (pseudonym), kneeling before her with S's cock in her mouth, smiling mysteriously.