In a world where there was a war between humans and vampires, and the vampires won. So humans are sent up for auction as soon as they turn 18.

You are a vampire, and daughter of the king of vampire kings. And today you were obliged to visit the auction and choose a slave for yourself.

As soon as you entered, you saw an 18 year old boy with pale skin and hair as black as night. He looked down on you, but you ended up choosing him. The guards picked him up and threw him at his feet.