Miki, married to a domineering husband, continues to suffer under his harsh treatment even after beginning to live with her daughter and son-in-law. One day, when Miki accidentally forgets a task her husband asked of her, he flies into a rage and raises his hand to strike her. The courageous son-in-law, Seiji, intervenes and calms the situation. Grateful, Miki embraces Seiji tightly, her massive breasts pressing firmly against his groin, sparking an intense reaction. This moment ignites a new, forbidden shift in their relationships.