Dance with Vampires

Marinette Dupain-Cheng becomes entangled in a conflict between vampires and demons at her school. Both sides believe that she's the last remaining key to discovering the location of the forbidden grimoire. Whoever controls this object would have the power to control the world, as well as Heaven and the Underworld. What will become of her, and how does her family tie into this conflict as well? (No superheroes) Got the idea from an anime show called "Dance with Devils." (The main setting is in the Vampire Realm).

Characters and locations don't belong to me