Hunters and the Hunted

It's the year 575 A.A. about 725 years after the Apocalypse. There are 5 groups:
1) Vampires
2) Witchs/Warlocks
3) Warewolfs
4) Humans
5) Hunters, who hunt the first 3
Vampires are the main enemy of the Hunters. There is only 1 pureblooded Hunter family left, and when the daughter of the 1st Vampire, and the son of the pureblooded family are thrown together, almost literaly, romance can blossom, or they rip each other apart, it's all dangerously new to the new world. Dangerous enough that if there is romance, they risk the other group killing them.