Her daughter-in-law Kokoro is under pressure to give birth to a grandchild. One day, at the suggestion of her mother-in-law, the whole family decided to go on a hot spring trip. However, his mother-in-law ordered him to abstain from sex for a month before the trip to give birth. On the day of travel, my heart will be sexually rejected by my husband. On the other hand, his father-in-law also tried to hold on to his wife but he refused. Two people with too much sexual desire went to a hot spring to soothe their bodies. And the father-in-law accidentally witnessed the heart-stopping bathing scene...