Slave Contract
A wife and her husband make an agreement where the wife become the slave of him. A couple rent Nami for three months from a supplier who "trains" women to be slaves and submit to everything no matter how degrading, humiliating or painful.
Directors: Masaru Konuma
Writers: Masahiro Kakefuda
Cast
Homepage: https://www.nikkatsu.com/movie/25911.html
IMDB: tt0287417