Secret Book: Turbulent Cloud

秘本　乱れ雲

Also known as Hihon: Midare-gumo, Stolen Pleasures

In the early Shōwa era, university student Gōji Murata boards with the Itō family, old friends of his late father. One day, the family's daughter Tomiko catches him reading an erotic book. Rather than being shocked, she’s intrigued, and soon gives herself to him. That night, her older sister Kyōko, having learned what happened, quietly slips into Gōji’s room..."