As the wife gives birth and raises their child, the couple's relationship gradually drifts apart. The daily fatigue and weight of responsibility widen the distance between them. Although the husband is cooperative, they continue to be sexless, and when he makes advances, he's rejected due to exhaustion. One day, the mother comes to the city to see her grandchild. When they meet after a long time, the husband is genuinely happy to see his mother's warm and gentle smile. However, the sight of his mother's chest as she gazes at her grandchild stirs his heart. That night, he gets a chance to watch his mother bathe up close. Although her body has sagged slightly, her pink nipples spark a uncontrollable excitement in him. In the dead of night, he sneaks into his mother's bedroom, flips back the blanket, and slowly ravishes her body...