A young married woman named Mahiro Ichiki is under pressure from her mother-in-law about not having children yet. One day, she goes on a family trip to a hot spring resort. However, due to her mother-in-law's insistence that they abstain from sexual activity for one month prior to the trip, Mahiro has been denied any intimacy with her husband during this time. On the day of their trip, both Mahiro and her father-in-law are rejected by their respective spouses when they attempt to initiate sexual encounters. Feeling frustrated and aroused, the two decide to relax in the hot springs together. By chance, Mahiro's bathing figure catches the eye of her father-in-law, who cannot control his desires... Note: Content may vary depending on distribution method.