Uniform Blackmailer (1979)

An older woman is approached with an offer to marry a wealthy company president, even though she is the second wife. If she accepts, the company will arrange a luxury apartment for her sister and her husband, and the husband will also be a company executive, and the woman decides to accept the offer. One day, the woman is attacked by a group of three men and raped in the street, but a photo of the incident is taken by a young boy who happens to be a factory worker. The boy uses the photo to blackmail the woman, and plans to escape from his poor life if he can get money...