Since their student days, Rei and Sese-ra have maintained a relationship where they occasionally meet up and chat about their lives even after getting married. However, Sese-ra has noticed that Rei has been saying more bad things about her husband over the past few months. Unable to bear seeing Rei like this, Sese-ra invites her to a hot spring inn with the words, "How about we go to a hot spring together?" And so they arrive at the hot spring inn. The innkeeper Yui's smile and the hot spring help Rei relax both mentally and physically. But just as their body temperatures rise, the innkeeper Yui slowly makes her way into the women's bath...
