Married Woman Mixed-Bathing Hot Spring – Adultery in Full Swing (2000)

Saki Kanzaki, a high school teacher, came to a certain hot spring inn with her friend Kanori Nomura. Saki was in an adulterous relationship with Seiji Funabashi, the young proprietor of the inn, and had come to see him. However, Seiji tells her they are breaking up. Heartbroken, Saki goes out with Kanori to pick up men. Meanwhile, staying at the inn is the erotic novelist Shundei Fukiya. Shundei was formerly a teacher, but lost his job due to an affair with a student. That student was Saki, and the two are reunited…