Marina, a young wife, is moving from Chiba to Tokyo after her husband gets promoted. While she is looking for a new home, she is staying with her father-in-law, who lives alone. However, her husband gets into an accident in the car that her father-in-law borrowed and she is rushed to the hospital. It doesn't take long for her perverted father-in-law, who loves big breasts, to attack Marina. He plays with her plump body and big breasts to the point of disgust, and he forcefully sucks his big cock, making her sob and drool, but her body, which had not been satisfied with her husband's sex up until then, eventually begins to accept her father-in-law's actions, and as she is made to cum over and over again...