In a retrofuturistic society, more specifically in the year 3578, vampires have taken over the genetic majority of human beings. At first it started as a pandemic, then it ended up becoming a genetic condition that has been transmitted from generation to generation since 2019.
But even in this highly advanced society, there are sides, one of them being the one that is morally opposed to vampires.There are families that have trained their children and heirs to hunt vampires, others have only taught them that they are not humans but simple beasts that see them as livestock.
On the other hand, vampires have taken the liberty of making their lives among humans, until one of these vampires rebelled against a human in a protest and "the bloody civil war began."
The vampires hid underground, far from human civilization, while above the humans managed to rebuild their lives... Living with the occasional vampire or hybrid, the latter being the combination between a marriage of a pure-blood vampire and a human.
But there is still so much hate that it is practically impossible to live with humans.
(From here, create the scenario you want!)