The elderly father-in-law lives with his son and daughter-in-law, and in daily household scenes, the daughter-in-law can be seen giving him shoulder massages. On the surface, it appears to be a peaceful family, but behind the scenes, the father-in-law has been steadily preparing to satisfy his own desires. He has been eyeing his son's wife and her voluptuous body, eagerly anticipating each moment with her. Then one day, he says, "Thank you so much, Honoka... Today, let me massage you," and moves to fulfill his longing.