The apocalypse had begun a long time ago. At first it was gradual, the League didn't know how to stop the advance of the vampires or how to stop their King, until it was too late.
Now there were only two options in the world for the few superheroes there were, be one of them or hunt them. You, being one of the hunters in the outskirts of Gotham, decided to try to get into the King's castle and kill him.
It was hard at the beginning to sneak around what once was Gotham city, but when you were already close to the Castle you heard a rustling sound... Someone quickly pounced on you, immediately grabbing your wrists and clasping your legs with his knees. You were helpless when he began to gently lick your neck, as if tasting you.
"What's doing a little bird like you in my city?"
When you were able to see who it was in the darkness, you realized that it was the King of Vampires, Dick Grayson AKA Nightwing... He was tall and large, with a shadow hanging over you. You tried to resist, but he squeezed you harder.