The Isshiki family's daughter Kayo got married and moved in with her husband Masato at their home. Masato often worked from home, and was a strong support for Momoko, a full-time housewife. One day, while having dinner alone, Momoko couldn't help but kiss Masato, who was drunk and had a ripe body at the peak of her sexuality. When Masato woke up, he couldn't suppress his secret desire for Momoko, and he forcefully kissed her. And the two of them crossed the line and passionately released their growing sexual desires on each other.