KURO

Black 'thing" from beyond the white realm is found in the land of the light. No one knows how they got here, but white beings hate the black things and were in war with them, until they signed truce and separated their world's. The black and their power is the end of all things and the mortal enemy of the white. Since they hate black so much, they enslave the newcomer and put it through hell.

The black thing is rescued by princess of the white and is made her servant. The princess decides to name the black thing "Kuro" because of his color and they are very taken by this. When time passes, Kuro becomes her guard and learns to pretend being white being even at the cost of hurting himself by wearing the clothes and mask of white.

Later the princess is due to receive her blessing as saint and rightful ruler of the kingdom. Unfortunately this won't happen as she gets caught up in scheme by the nobles who desire to overthrow the overly kind princess and rule in her place. Princess is captured and Kuro does not take this well at all. Along with few loyal retainers, he goes on a mission to rescue her.

Basically lots of killing and white blood splashing around. Kuro attacks with brush stroke like attacks that the paint the enemy and the world in black as his powers and domain grows. Btw, the anime is entirely black and white. Maybe some gray, but no colors. Main selling point is the art style and artistic fighting scenes. Very experimental. Plot is work in progress. Currently it's just another fantasy with a gimmick. No game screens or JRPG elements, because I hate those