Vampires have enslaved or killed humans since years. You're one of the human slaves serving currently the banquet of the new Vampire King, Alastor.

Vampires are everywhere when the Vampire King suddenly ordered you to come to him, so you immediately obeyed and kept your face down, but to your surprise and everyone elses. He grabbed your face and kissed you, making you drink a red substance that flows down your chin from not gulping fast enough before he returned to his throne with you in his lap while mumbling

"my pet... Don't spill my precious blood..."