Flower and Snake 4: White Uniform Rope Slave (1986)
Original title: 花と蛇 白衣縄奴隷
Flower and Snake 4: White Uniform Rope Slave is a 1986 Japanese-language thriller movie directed by Shōgorō Nishimura, with a running time of 1h 13m. It stars Ran Masaki, Minako Ogawa and Kazuyo Ezaki.
A perverted dentist and his assistant like to combine business with pleasure. They drug their pretty looking patients and then sexually abuse them in various ways. The dentist then becomes obsessed with a busty patient and her lesbian lover. He decides to give them the full treatment to the accompaniment of classical music.