This is one of Nikkatsu's Roman Poruno (Porn) series movies. This movie as is many of Roman Poruno series movies are now available as streaming video from movie sites in Japan. Miki Takakura plays the beautiful daughter of a wealthy entrepreneur.
A cameraman and a man claiming to be a woman trainer (like an animal trainer) is planning to kidnap a beautiful daughter of a wealthy entrepreneur played by Miki Takakura. She is captured on her way home from college and is detained in the cameraman's studio. From that point on she is gradually trained to be a sex slave by the woman trainer. Who she's being groomed to be sold to turns out to be a surprise.
These soft core bondage films were the hall marks of novelist Oniroku Dan who is credited on the title. This was about as riskay as they could go in explicit sexual expression in the '80s Japan. The treat of this movie is the beautiful Miki Takakura who plays the lead role. Plot and acting is above average for a movie of this type and is pretty entertaining.
This movie is recommended to those who seek good B movies from Asia.
R.I.P. Oniroku Dan