Daiamondo wa kizutsukanai

This 1982 film is an Action, Drama, and Romance that tells the story of a college student who has an affair with a married, middle-aged teacher, Yumiko Koshiya (Misako Tanaka), leading to a complicated web of relationships and consequences. The film's focus on the emotional and social repercussions of extramarital relationships is likely to be a key aspect of its narrative.