Saeko had a notorious past, she was addicted to sex and willing to have intercourse and let countless men ejaculate inside her, even strangers. As a result, she gave birth to Kaori, not knowing who the father was and lied to the child that she and her husband divorced early. Since Kaori was born, Saeko was able to calm down and control herself, no longer having sex with anyone else but focusing on taking care of Kaori and raising her. Time passed, and Kaori is now married. Her husband, Hiroyuki, is very kind and gentle, he has helped Saeko a lot. However, one night, Saeko witnessed her son-in-law having wild sex with Kaori, Hiroyuki treated Kaori like an animal, triggering memories of the past. It had been too long since she had enjoyed that pleasure, making her unable to calm down and coming up with a very wrong idea. When Kaori went on a trip with friends, Saeko changed into revealing yoga attire. She seductively performed yoga poses to entice Hiroyuki, trapping him in the lustful trap she had set...