The husband was diagnosed with azoospermia. That was the beginning of it all. His husband suddenly proposed that he have a child with his brother-in-law instead of him. Although Kana, the wife, feels disgusted, her brother-in-law's wild, animal-like caresses, which are given at any time and place, gradually lead her to break away from the old-fashioned morality that "chastity is a wife's duty."