In ancient times, a dominant demon lord governed the people until a hero of equal strength emerged and conquered him. To be prepared for any upcoming threats, Rosewood Academy was founded as a training facility for potential heroes. At present, only superior candidates are accepted, such as Arnest Flaming, who possesses unparalleled talent. Arnest, recognized as the "Empress of Flame" because of her diligent nature, encountered a laid-back boy in the halls of the school who matched her abilities, despite never meeting him before. Eventually, this mysterious person, who went by the name of Blade, disclosed that he was new to the school and needed Arnest's aid in adjusting to Rosewood Academy's day-to-day routine, as instructed by the current monarch.
