Kettou Shijou Shugi Meika no Youshi no Yarinaoshi

In a world governed by the absolute supremacy of noble bloodlines, the art of magic is an exclusive privilege reserved solely for the aristocracy. Yet this rigid hierarchy crumbles when a catastrophic demonic invasion sweeps across the land, rendering the nobility's spells entirely ineffective and pushing humanity to the very brink of extinction. Amidst the ensuing devastation, the final beacon of hope emerges from an unlikely , a peerless swordsman born into slavery who rises to become the strongest warrior in a dying world. Moments before his death on the battlefield, Colin acquires a legendary artifact known as the "Forbidden Book," a tome containing the power to grant anyone the ability to wield magic. Upon opening his eyes, he discovers that he has been thrust five years into the past, inhabiting the body of his younger self. Armed with the knowledge of the impending apocalypse and the secrets of the Forbidden Book, Colin seizes this second chance to rewrite history. No longer bound by the limitations of his birth or the outdated laws of society, he resolves to forge a new path as a Magic Swordsman. By mastering both blade and spell, he vows to reshape the world and lead humanity to victory against the demonic horde.