"Yuu" has grown completely cold towards her husband and is obsessed with a younger man she's having an affair with. Her husband, noticing her recent strange behavior, decides to follow her. His suspicions were confirmed. He witnesses everything from their tryst to the decisive act of adulterous sex. However, his penis becomes erect. Unaware of this, "Yuu" continues her acts at home. One day, as they enjoy pillow talk after their affair, her husband attacks them from under the bed. And then...
