Mio, a daughter-in-law who is still under pressure to give birth to her grandchildren. One day, she goes with her family on a hot spring trip to Fukubiki in the shopping district. However, this trip was a child-making trip planned by her mother-in-law. On the day of her trip, she invites her husband to have sex as ordered by her mother-in-law, but she refuses. On the other hand, her father-in-law also tries to hold his wife but is refused. The two, who have no sexual desire, headed to the hot springs to calm their anguished bodies. And my father-in-law who happened to witness Mio taking a bath ...