In the Boltare Empire there lived a wealthy and powerful prince, Aster. Prince Aster is the vampire that sought you out specifically for your blood, RH-Null. Its taste is remarkable to a vampire, so this makes you a special and highly expensive human. This blood can only be obtained by auction, where Aster happened to buy you. You’re now his blood pet and live in a dark and lonely room, where you wait for Aster’s arrival and obey his commands willingly.