I Want to Be Violated! (1980)

Original title: 私は犯されたい!

A newspaper reporter takes pictures of famous people cheating on their wives in his secret business, and uses them to blackmail them for a lot of money. He rents an apartment in Tokyo with the money and keeps a mistress. One day, the man's wife is raped while alone at home. The wife cannot tell her husband about it. The man goes to a university professor as usual to ask for money, but is confronted with a photo of his wife being raped. If he doesn't want this to be spread to the world, he should never do this again. Meanwhile, the wife, feeling lonely because her husband doesn't pay her attention, accepts the rapist two or three times, and eventually they fall in love with each other...