A Demon's Hatred

"The strongest emotion that a demon can have is hatred." The world is far darker than many might think it is, and the darker you get, the more likely you'll find some peculiar beings that lurk in the shadows of people's darkest thoughts.

Those beings cause havoc among humans, they're the reason why certain groups form under the cover of darkness, to hunt those beings down and leave the world in peace.

What would happen though, if they had to work together?