The woman in prison exploitation sub-genre doesn't exactly have the best reputation for example Bare behind bars and SS experiment love camp comes to mind but this is something different. Firstly It feels more like an art film by the way its shot. It uses interesting compositions and at lighting. The nudity in the film doesn't feel like its sexual well to me anyway maybe a sadist would see it differently. The initial rape scene in the film is done so it's not too graphic and hard to watch similar to the one seen in Lady Snowblood. On top of all that the writing is terrific, the motivation of the Sasori isn't revenge for the rape. It's revenge for the double crossing which drives her to put up with the struggles of prison life so that she might get out. What i love about the main character is that she hardly talks throughout the film and does all the communicating with her eyes. Which leaves you guessing what she will do next. The music is great and the movie is action packed with a satisfying ending the only part that didn't seem right was the random Lesbian scene which felt out of place but they justify it later. so give it a watch you won't be disappointed.