Akai sukyandaru: jōji (1982)
When the chaste wife first learned of ecstasy...
Roman Porno from 1982. A young university associate professor sells her body as a high-class prostitute while her husband is away, despite being in a calm relationship. The husband, while turning a blind eye to the behavior of such a wife, begins to feel a masochistic pleasure, and two people connect with a mysterious marital love.