Shiofuki girl: Junko (1985)

Unemployed, Eiji comes up with a new business idea to support himself and his girlfriend, Junko. His plan involves approaching childless couples, arranging for the husband and Junko to have an open affair, and receiving a contract fee if she becomes pregnant. Junko works hard to conceive with the husband, while Eiji meets other women to alleviate his loneliness…