Ryo and Misato are two married people who are not doing well together, but they hit it off and started an affair as business partners. At first, their relationship was hot and steamy, but just as they were starting to think that they needed to give up on their infidelity, Misato begged him to let her have him all to herself for once, and they decided to go on an overnight trip to a hot spring. However, it seems that Misato had decided that this would be the last time...!