This is a story of a boy lark who is different from the rest of the kids. He has red eyes just like vampires and he is bullied for that and called as monster by them. One day he stumbles upon setz a vampire of noble clan, he was the only one who would accept him and doesn't call him monster. Gradually they become friends but lark family members decides to take lark to a orphanage and that is when his only friend, setz invites him to his home to another world, the world of vampires.