Taichi is baffled when his in-laws suddenly ask him to abstain for a month before their family hot-spring trip, hoping he will use the getaway to make a baby with his wife. He follows their request, but by the day of the trip his pent-up desire is unbearable. Trying to cool off in the baths, he accidentally enters the women’s side and catches his mother-in-law in a sensual bathing scene—an encounter that leads him to lose control and repeatedly creampie her.