Nanpa (1988)
An office lady sleeps with a guy she met in a bar after she finds out that her fiancé and her co-worker had a past relationship.
Actors: Yōko Fujita
Dont Laugh At My Romance (2007)
A 39-year-old female teacher begins a sexual relationship with a 19-year-old student, who later finds out that she has a much older husband.