52-year-old Sakiko is unsatisfied with sex from her husband and enjoys daily masturbation, but her son catches her in the act. Unable to resist her aroused son's advances, she gives in despite knowing it's wrong, driven by an uncontrollable desire. Her lustful body seeks pleasure by fulfilling her own cravings through her son, oozing thick, cloudy fluids as she surrenders. Deep inside, guilt and ecstasy swirl together in a tormenting conflict.