The ultimate mature women's luxurious joint performance is complete! This is a secluded hot spring inn, Kirioka Ryokan, nestled in the mountains. Suddenly, news of the owner, Mori's accidental death reaches Kirioka Ryokan―. Then, the head madam, Kaoru declares her retirement―. Everyone thought the next madam would be Ryoko, but Kaoru appointed her real daughter, Satsuki, who works in Tokyo. Satsuki throws herself into the unfamiliar role of madam, while Ryoko & Natsuko disapprove. Amidst the ongoing turmoil at Kirioka Ryokan, a voyeurism scandal erupts…
