Miho lives with her husband and son, and her brother-in-law Naoya comes to stay. Naoya is a popular professional wrestler who travels all over the country, is friendly and admired by both her family and herself... One day, Miho mistakes Naoya's costume that was lying in the entranceway for trash and throws it away by mistake. When Naoya finds out, he goes berserk, and ruthlessly attacks Miho with his bulky manhood, ignoring her apology...