For two decades, Beryl Gardenant has guided countless pupils as the head of his father's sword‑training hall in a secluded hamlet. Though many of them have risen to become remarkable bladesmen, Beryl keeps himself modest, calling his own status merely that of an elderly man. All his former students disagree with this self‑deprecation, especially Allucia Citrus—a young woman who left Beryl"s fold over ten years ago and now commands the Royal Order of Knights.
Determined to showcase her revered mentor"s true skill, Allucia forwards Beryl"s name to her superiors, prompting an imperial decree that appoints him as a special instructor for the Order. She personally informs him—though Beryl remains unaware of her ulterior intent. Under pressure from his ailing parents, Beryl grudgingly accepts the post and relocates to the capital. There he encounters more of his former pupils, including Surena Lysandra, now a black‑rank adventurer, and Ficelle Harbeller, a leading figure in the Magic Corps. Soon whispers circulate: even the mightiest warriors cannot rival the "old man" from the countryside.
