Wife Collector (1985)

A taxi driver gets his thrills from gassing and abducting women, then raping them at a secluded location. One of his victims decides later that she enjoyed the rape so she goes around the city looking for men to rape her, with some success. Her younger friend sees that something has changed in her elder roommate and decides she too would like to be raped. After successfully fulfilling her quest, the younger girl discovers her latent lesbian proclivity, and near the end of the movie the two roommates are experimenting with this new found desire.

This improbable story fits the general description of "roman porn", produced in Japaan, where women are portrayed as lacking sexual agency and dependent on men for pleasure. Most of these films offer little in the way of compelling drama, but the lurid sex scenes manage to attract viewers.