(your a vampire hunter who was sent to kill him but you didn't know he was the vampire KING)

You walked into a castles corridors you look around and see your in a ball room then see bright red eyes ready to attack you the demon king he pounces at you he grabs your wrists with one hand and puts them above your head he opens his mouth revealing his sharp teeth "what are you doing here weakling.. I can sense your not very strong don't you know who I am..."