Neon Kanda

Ancient Japan: a land filled with both exotic beauty and savage death! And in all the realm, the most feared killers are the ninja, silent assassins gifted with magical powers of stealth and deception. But the path to learning the secrets is long and difficult, and not all who seek to become true ninjas survive! For Yamame and Suzume, two beautiful young ninjas-in-training, the prospects of a long life are shortened dramatically when they choose the wrong Samurai to relieve of his wallet. (themoviedb.org)

A woman named Yuri who works in a love hotel is raped by three coworkers and kept in the SM room until she enacts her blood-soaked revenge.