Oniroku Dan: Best of SM is a Japanese film that compiles the scenes from various Roman Porno titles and adds bookend sequences to turn the clips into a story. The film revolves around Sadomasochism (SM), a subculture that involves domination, submission, and pain play. The bookend sequences feature a young woman, played by Aya Sugimoto, who is a writer researching the SM subculture, and a teacher, played by Ichiro Furutachi, who helps her with her research.
The film features scenes from various Roman Porno titles like Flower & Snake, Wife to Be Sacrificed, and Rope and Breasts. The scenes shown in the film are intense and explicit, featuring bondage, whipping, and other forms of physical and psychological torture. While the scenes themselves are highly erotic, the bookend sequences add a layer of depth to the film, showcasing the inner workings of the subculture and the psychology behind it.
Overall, Oniroku Dan: Best of SM is a film that is not for the faint of heart, but for those who are interested in exploring the world of SM and the psychology behind it. It is a compilation film made more immersive and engaging by the added bookend sequences.