Sayuri, who usually enjoys exercising, had always done it alone since her husband and son wouldn't partner with her. One day, her son brought his friend Kousuke home, and seeing his well-toned body made her feel aroused. She casually invited him over... Kousuke, who could go on without tiring no matter how many times he came, kept ravishing her until morning. Ever since, Kousuke, who was obsessed with her body, would visit multiple times a day... In the process of satisfying his desires, Sayuri's body eventually reached its limit.
