Cannibal

Cannibal is a 2006 German direct-to-video exploitation horror film written, directed and produced by Marian Dora in his feature film debut. The film centers on a mentally disturbed individual simply known as "The Man", who has cannibalistic fantasies. He makes a deal with a suicidal man known as "The Flesh" who agrees to let The Man eat him.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.

Poster © the film's rights holders.