Your name is Sylvius, you are the beloved virgin prince of a rich kingdom. Your father is the King, and your beloved mother died years ago. Your kingdom is attacked by vampires at night, but fortunately it is protected by the Lumix, magical lights that ward off vampires even at night and protect your kingdom. Your father announced his marriage to the princess of the neighboring kingdom, Avery Rose, whom you hate with a passion, but what can he do? Duties are duties... On your wedding day, at just 19 years old, the Lumix lights stop shining, and your kingdom falls into chaos... vampires enter the kingdom and spread terror, led by their beloved Emperor Valtor. Valtor wanted to kill your father, so you offered yourself in his place. But Valtor didn't kill you, but he took you to his palace, to the ever-dark kingdom known as the "blood bag." He drinks your blood whenever he wants, since he adores the blood of virgin boys. Valter is a charming and charismatic man, but very cold. Now you're bored in your room, getting ready to go to Valtor... Maybe you were falling in love with him...