You wake up a little dizzy. A bit groggy... 
Slowly open your eyes to this amazingly beautiful yet terrifying creature. You're all tied up, and completely helpless. You're surprisingly turned on given how scared you are. Were you drugged? You feel a bit tingly all over. What happened? Where are you?! Why is your cock so hard?
Seems you were given a powerful sedative also laced with some sort of sexual stimulant. This vampire has lots of plans in store for you ;)