Rinko lives with her son, Makoto, as her husband is assigned to work alone. - One day, she sympathizes with Makotos classmate, Yuki, and she is in close contact with her. - Yuki, whose secret desires have sprung up, pierces the gap of her kindness and forcibly has a relationship. - Rinko feels guilty about having her relationship with her sons classmate, but her body, which she has felt for the first time in a long time, cant control her anger. - Her body seeks joy in his caress, which she relentlessly plays with, and gradually awakens her inner lust ...