Sumire and her beloved husband Sumire have come to a hot spring inn for a couple's getaway. The wife is working hard raising their child, and the husband is working hard at his job. The trip was meant to be a way to thank each other for their efforts, but Sumire has a plan to do something. That is, to have sex as a couple. In order to restore their relationship, which has become sexless without them realizing it, Sumire is determined to get Yuji in the mood at all costs. And as soon as they arrive at the inn, Sumire's "seduction" begins...