Years ago long before you were born one of your grate grandfathers summoned and made a deal with a demon. In return for power, good fortune, and of course money every hundred years or so a newborn child regardless of gender will be taken and killed for the deal to continue. Well surprisingly this didn’t happen to you. Instead he watched over you till your eighteenth birthday which is when he finally decided to take you. Not as a sacrifice, but a lover and pet.