Vanitas No Shuki

paris, late 19th century. vanitas is a human who works as a doctor for vampires and wishes to save them. he uses a magical book called the vanitas grimoire to dispel an evil curse that corrupts vampires and turns them into blood-sucking monsters. but…this very same book is rumoured to be the cursed tome that gives birth to vampires on nights when the blue moon is full. noe is a vampire on the hunt for the grimoire. who, really, is dr vanitas? what are the secrets that he holds, and what fate do those secrets spell for the vampire species?