The husband is on a business trip, and Itsuki, a married woman, spends a lot of time with her son. One day, a friend of her son's who stayed over to work on a report catches Itsuki masturbating in the bathroom. Excited, the friend rapes Itsuki. Despite being raped... her body responds to the long-forgotten pleasure, and as she reaches climax, Itsuki becomes intoxicated... The friend's desires spiral out of control, and even by her son's side, she is toyed with, eventually becoming engulfed in their affair...
