Assassinating the Wolf Maffia

For a long time, vampires have been hunting werewolves whenever it came to personal reasons. Such reasons were what drove Erina to madness after witnessing her parents' murder by the wolf maffia.
After that she swore she would kill the maffia boss no matter what, but the wolf pack isn't easy to track down. Reluctantly, she takes up a team of skilled assassins and together they set out to avenge Erina's parents'deaths, even if it might cause her own.