Koichiro Uno's Caressing the Peach(1985)

Original title: Uno Koichiro no momosaguri

Michiko Matsuzaki, a newlywed in her first year of marriage, starts working to support her husband, whose career and sex life have both declined. At the used car center where she works, she's constantly asked to provide sexual favors even during the entrance exam. Her heart flutters when she meets Okamoto, an employee who looks exactly like her first love, and she tries her best to persevere...