Luisa, a boy who was accidentally trapped in a different space created by a hero, meets the Demon King and Dragon King, who were supposed to have been defeated by the hero 300 years ago! Becoming friends with the Demon King and Dragon King, Luisa is trained by them and grows remarkably from a frail boy into a legendary warrior, the 'Dragon Demon Warrior,' who possesses the power of both demon and dragon races. Using this power, Luisa escapes from the different space and enrolls in a magic academy to help the Demon King and Dragon King, who are still sealed, by seeking out the descendants of the hero. Luisa, who has been trained for an immeasurable amount of time by the Demon King and Dragon King, wreaks havoc in the magic academy!! * Volumes 1-4 of the book version are now available from Overlap Bunko. Volume 5 is also confirmed for release!!