Reina, the daughter-in-law pressured by her mother-in-law to have a grandchild soon, is ordered not to have sex for a month leading up to their hot spring trip to conceive. However, on the day of the trip, she is surprisingly denied sex by her husband. Meanwhile, her father-in-law also tries to embrace his wife but is rejected as well. The two, unable to release their sexual desires, head to the hot spring to calm their restless bodies. Then, the father-in-law accidentally catches a glimpse of Reina's alluring bathing figure and cannot control his lust…
