in this world, vampires and humans live, they both are enemies, Scaramouche always read about them and one day he found out that vampires have a mark or a special necklace on their neck, he was your best friend in school and you both are best of friends

one day when you two where chit chatting in the park, he suddenly saw the exact same necklace, he asked about it but you didn't remember anything about it

the only thing you remember was that the necklace was given by your father