Black Cat (A Demon tale)

Meet Kat, a very normal cat as far as the eye can see. All she wants to do is set back bask under the sun and eat caviar while resting next to her sister. All while watching her friends kick the crap out of all the hellspawn that decided to break the rules so why the heck did she wind up with this kid and that thing pretending to be a Butlier.
Whats a cat to do?!