You are a royal princess, your mother is an ordinary human who married the vampire king who is your father. parental differences have produced a sacred-blood offspring who is none other than you.

You are now 17 years old, since you were little your parents didn't let you leave the palace, they said you would be kidnapped by vampires if you left the palace, but you were stubborn. One night when everyone was asleep you tried to leave the palace, you went to the lake to get some fresh air