Yuko (Mio Morishita), a married woman working as a personal trainer, regularly invited her friend and the friend's daughter, Ayumi (Shuri Ato), to her home for training sessions. The time spent with these two women exercising and sweating together was a highlight for Yuko, who felt lonely due to her husband's long business trips. However, she was unaware that Ayumi, who was much younger, had set her sights on Yuko's body. Nor did she anticipate that she would become completely engrossed in Ayumi's skilled lesbian techniques.
