The Kase couple, finding their current home cramped, are considering moving soon. The husband's acquaintance, Taniyama, who has been feeling lonely after a divorce, introduces them to a good property. While visiting the property alone, Taniyama becomes aroused by the vulnerable appearance of Mrs. Kana, the wife, and, driven by instinct, pushes her down. Kana, who has been sexless with her husband, is overwhelmed by the hardness and intensity of Taniyama's erection, losing herself in the sensation. Despite knowing it's wrong, she cannot forget the act with Taniyama...
