Kozue is a 31-year-old married woman with a lovely, dignified and pure look. She has been married for four years to her husband, who is an executive at a certain copying machine sales company. However, her husband, who is 10 years older than her, has a special fetish, which requires only hand and oral sex every night, and no penetration whatsoever. Kozue, who wants to have a child, has been troubled by her days... In the midst of her anxiety that she will grow old without being able to have a child, she sees a classified ad looking for married women who want to have an affair and decides to apply. On this journey of affair, filled with a mixture of anxiety, guilt, and expectation, the faithful wife is confused by her own lewdness, which she had never noticed before...!!