Yuri is a perverted masochistic mother already trained by the man she calls Master. One day he orders her to offer her adult daughter Kana as another slave. Knowing refusal means being abandoned, Yuri agrees. While Kana is out, Yuri seduces her boyfriend and makes her daughter watch as sex drives her wild. Kana has inherited her mother's masochistic nature and grows aroused by the sight. Bound and trained together, the adult mother and daughter become his ultimate pair of slaves.