Friends with a Demon

Hey Names Ace and I'm friends with some one named Kai and he isn't just a normal kid he has a dark secret that only i know and that is he's a Demon and i'm a Demon Hound which means that I'm a protector to the Demons that have special powers that other demons don't have so that"s why i have to keep my friend safe but that doesn't mean we can't have fun anyway lets begin on how we met and how we found out who we are.