Ichika is a married woman who has been married for two years. At first, her relationship with her husband Mitsuru was going well, but recently, due to work stress, they have not had sex at night, and Ichika's body is aching terribly. Her father-in-law notices her loneliness and asks her for advice... Although he has always lived alone, his father-in-law has secretly been in love with Ichika, and he takes advantage of her weakness and pushes her down in one go. Having been toyed with for the first time in a long time, Ichika's body is unable to resist the pleasure and she accepts it. Of course, having gotten a taste of it, his father-in-law's desire is not satisfied after just one go...