In a bygone era, a fearsome demon lord reigned until a valiant hero emerged, vanquishing the tyrant. In response to looming threats, Rosewood Academy emerged as a hub for aspiring heroes. At the pinnacle stands Arnest Flaming, dubbed the 'Empress of Flame', unrivaled in skill. Her routine is disrupted when a carefree boy named Blade, wielding powers akin to hers, crosses paths with her. Unbeknownst to her, he is a new student transferring to Rosewood Academy, specifically sought after by the King for Arnest's guidance in acclimating to academy life.