"A marital problem is a family problem. In that case, it's okay to rely on your son, right?" The Kichise couple are known by those around them as a loving couple, and are so close that they go out on dates on holidays. However, their nightly relationship was completely sexless. To the husband, his wife Aoi is just a family member who is as comfortable as the air. Aoi's thirst for sex, not being treated as a woman, has already reached its limit. If you can't solve it with your husband, then with that young, strong body that looks exactly like your husband...