God-Slayer of the Fire Realm King’s Sword

Five years ago, in the wake of the “Great Magic Disaster,” Japan was transformed into a demon realm—a place where humans who had become Magicians and demonic beings now coexisted. In this transformed land, a young boy named Natsuhiko, who had risen to become one of the world’s most powerful Magicians after training under one of the most formidable demonic beings, returns to Japan after a five-year absence to protect his beloved Orihime, who had awakened as a Magician before him. Little does he know, his return marks the beginning of a fierce battle over the relics of the God-Slaying Demon King!