While her husband is often away on business trips, Chihiro lives with her husband's stepson, Ryota. However, Ryota doesn't warm to her, and Chihiro is troubled by this. Her anxiety leads her to indulge in extramarital sex, but Ryota takes a video of the affair as evidence. He threatens and trains Chihiro. He forces her to give him a blowjob, and makes her cum with toys... His rampage continues, and she is finally raped and tortured...