Abandoned by her parents and raised in a facility, her mother, Ayano, dreamed of a happy life with her family of three because of her circumstances. . Before her marriage, Ayano was taught the pleasures of anal by her lover, whom she adored like her brother, while growing up in the same facility. Since then she couldn't forget the taste and always had anal sex with her husband. Takayuki, who knew about her abnormal couple's activities, felt more for Ayano than her mother, and finally crossed her forbidden line.
