Kokoro, the bride pressured to give birth to a grandchild, was proposed by her mother-in-law to go on a family hot spring trip. However, for the sake of having a child, she was ordered to abstain from sex for a month leading up to the trip. On the day of the trip, Kokoro was surprisingly denied sex by her husband. Meanwhile, her father-in-law also tried to embrace his wife but was rejected. The two, overwhelmed with sexual desire, headed to the hot spring to calm their restless bodies. Then, the father-in-law happened to catch a glimpse of Kokoro's bathing figure...
