Chisato and Ayako have come to a hot spring trip just the two of them. Though it's hidden from her husband, they are lovers. The liberating feeling of being away from daily life leads Chisato to boldly suggest, "Let's go for a walk in our yukata without underwear." The thrill of their hearts pounding, the two indulge in each other's erogenous zones in the open-air bath. "Someone might come..." This sense of taboo heightens their pleasure more than ever, and unable to hold back any longer, they delve into even more intense play with the sex toys they had prepared…
