Binetsu Hime: Zange no Shou
Rating: 4.93
Alternative Titles
Binetsu-hime: Zange no Shou, Binetsu-hime: Zange no Shō, Dorei Ningyou, 微熱姫 懺悔の章
Description
By sheer chance, Mikan manages to get a recording of her best friend, Nodoka, and her teacher having sex. After watching it, she decides that she wants to see more. (Source: AniDB)