Yumiko (36) is on her 11th year of marriage, but has not been blessed with children. Her sex life with her husband occurs only once every six months, an extremely rare frequency. As her desire for a child gradually fades, the gap between her and her husband continues to widen. They rarely eat together anymore, and even minor issues often lead to arguments. Unable to find a way to repair their relationship, Yumiko embarks on a trip, where she pours out her marital frustrations to a man she meets for the first time. The moment their hands touch, long-forgotten emotions surge back within her chest. When the man approaches her at an open-air bath, her body instinctively responds, lubricating with arousal. Overcome by excitement, Yumiko reaches climax in the cowgirl position, rhythmically grinding her hips. This impulsive moment awakens something deep inside her that had long been dormant.