With her husband often away on business trips, Chihiro lives with her stepson Ryota. However, Ryota does not warm up to her, causing Chihiro to feel lonely and troubled. This anxiety also leads her to indulge in extramarital sex, but she is caught on video by Ryota. He begins to threaten and train Chihiro. Forced oral sex, toy torture to orgasm... His rampage does not stop, and eventually, Chihiro is raped and tormented...
