Dictatorial Grimoire [Manga]

Otogi finds a manuscript that reveals the dark truth about the Brothers Grimm and the secret deal they made with beings known as the Marchen Demons. Otogi Grimm, a far-flung descendant of the renowned Grimm Brothers, has always regarded the fairy tales his ancestors concocted as pure fiction. Now, the introverted half-Japanese teen is about to discover that the Grimm legacy is anything but pure.