“Takashi-kun… please abstain for a month before the trip.” Suddenly hit with these shocking words from his father-in-law, he is left bewildered. The hot spring trip was planned to treat his father-in-law’s back pain, but he is asked to take advantage of it to try for a child with his wife. However, his wife has no interest in making a baby and refuses no matter how many times he invites her. After the period of abstinence, unable to sleep due to frustration, he wanders the inn late at night to distract himself and happens to witness his mother-in-law bathing…