Rinko lives with her son, Makoto, as her husband is assigned to work alone. One day, when Makoto's classmate, Yuki, feels sympathy and treats herself ... Yuki, who has a secret desire, takes a chance of her kindness and forcibly has a relationship. Rinko feels guilty about having a relationship with her son's classmate, but the body that she has felt for the first time in a long time can't control her anger. The body seeks joy from his caress, which is relentlessly playing with him, and gradually awakens his inner lust.
