One day, a clan tried to destroy the " Ancient Sword", but the mission was failed. To prevent the next catastrophe, Sakuya, the strongest boy of the clan, jumps to the next thousand years, but he finds himself in a world of magic. Sakuya, who cannot use magic, is looked down upon as "incompetent"...! From Author of "Shosetsuka ni Narou" comes a royal school fantasy where the "strongest swordsman" saves the world!