A Flower Aflame
When Sonoko enters a traditional Japanese arranged marriage with Amamiya facilitated by her parents the resulting union is loveless including the functional and goal-oriented sex. When the husband and wife move for his work she falls for her husband's boss and takes on the role of a betrayer.
Directors: Hiroshi Ando
Writers: Hisako Kurosawa, Jakuchô Setouchi
IMDB: tt5741848