“Sho, please abstain for the month before our trip.” My father-in-law's sudden request leaves me bewildered. What was supposed to be a private family hot-spring getaway is also meant to give my wife and me a chance to conceive. But my wife has no interest in having a baby and rejects every advance. After a month of abstinence, I roam the inn at midnight trying to calm my pent-up desire, only to catch an unexpected glimpse of my mother-in-law bathing seductively...