His wife, Tomoki, is under pressure from her mother-in-law to give birth to a grandchild. One day, the whole family decided to go on a trip to a hot spring. However, in order to have a baby, her mother-in-law orders her to abstain for a month before the trip. On the day of the trip, Yuki's husband refuses to have sex with her. Meanwhile, his father-in-law also tries to hold his wife, but he is also refused. The two, overcome with sexual desire, headed to a hot spring to soothe their aching bodies. And my father-in-law, who happened to witness Tomoki taking a bath...