Himeka Iori is under constant pressure from her mother-in-law to produce a grandchild. Before a family hot-spring trip, she is ordered to abstain for a month so she can try for a baby there. Yet on the day of the trip, her husband refuses sex, while her father-in-law is likewise rejected by his wife. Both frustrated and desperate for relief, Himeka and her father-in-law head to the baths. When he accidentally sees her bathing, he loses control of his desire, leading to repeated creampies throughout the trip and the fear that he may have impregnated her.