Daughter-in-law Kokoro is still under pressure to give birth to a grandson. One day, at the suggestion of her mother-in-law, the whole family decided to go on a hot spring trip. However, her mother-in-law forced her to abstain from sex for a month before leaving to give birth. On the day of the trip, I couldn't bear to refuse my husband's sex. On the other hand, her father-in-law also tried to arrest his wife, but she refused. The two, who had high sexual desires, went to the hot springs to soothe their bodies. And the father-in-law witnessed his heart pounding….