Ai Shimai: Futari no Kajitsu  

Hermanas Inmorales, Immoral Sisters, Liaisons immorales, Ανήθικες Αδερφές, 애자매, 愛姉妹~二人の果実~, 愛姉妹～二人の果実～

Takedo Nogawa, being the wealthy industrialist's spoiled son, had always been fascinated with Yumi Okamoto, his father's personal secretary. However, he was unable to pursue her due to their relationship as a family member and her role as his father's sex toy. After an accident involving Takedo and Yukie Kitazawa, the latter became his opportunity to one-up his father. According to a contract arranged by Yumi, Takedo allowed Yukie to waive her legal fees in exchange for becoming his personal sex slave. However, this was not enough for the elder Nogawa, who took things further by using Yukies teenage daughters as his own twisted sexual objects. This led to a sick game between father and son, where they both competed to strip the Kitazawa women of their dignity. Ai Shimai: Futari no Kajitsu is a story about power dynamics and how those in positions of authority can abuse it for their own selfish desires.