Jinrou Shitsuji no Bussou na Nikka

Werewolves - For centuries they wagged their tails and served the vampires. But no more! As payback for his missing father, werewolf Phil decides to exact sweet revenge on the bloodsuckers. Undercover, he is employed as a butler by the most dangerous and famous vampire, Eric Beaufort. But no matter how hard he tries, Eric is not just unexpectedly friendly and kindhearted, all the usual anti-vampire tools are useless against him. How is Phil supposed to get rid of his new master?