An uneasy atmosphere gradually grows in the house where the couple and the husband's father live. The young wife, Tsukasa, has a beautiful face and voluptuous breasts, and her father-in-law has always felt a desire for her. At that time, her husband is scheduled to go on a long-term business trip for 10 days. Tsukasa has always felt uncomfortable with her father-in-law's gaze and behavior, and her bad premonition turns out to be true when he gives her a drug that strongly stimulates her sexual desire. Her body becomes so sensitive that she feels pleasure and is unable to resist even the caresses of her father-in-law, whom she hates, and the young wife is thrown into an extraordinary state of ecstasy...