Oshiego to Kyôshi: Itazura Hime Hajime

Oshiego to Kyôshi: Itazura Hime Hajime (2003) is a film directed by Akiyoshi Sugiura rated 2.0/10.

Tatsuji, the protagonist, is a retired high school teacher living a quiet life of leisure. With time on his hands, his only pleasure is eavesdropping on his son and daughter-in-law’s sex life. One day, a former student named Kana visits him and declares, "Teach, have sex with me!" To think he’d be giving a girl like her a "private lesson" in bed...