“Kenichi, please—could you abstain for the month before our trip?” Kenichi is bewildered by his father-in-law's sudden request. What was supposed to be a private family hot-spring getaway comes with an unexpected mission: use the trip to conceive a child with his wife. But she has no interest in trying for a baby, rejects every advance and eventually passes out drunk. Sexually frustrated and unable to sleep after a month of abstinence, Kenichi wanders the inn late at night and happens to see his mother-in-law bathing.