人類裏切ったら幼なじみの勇者にぶっ殺された

人類裏切ったら幼なじみの勇者にぶっ殺された, I Betrayed Humanity and Got Killed by My Childhood Friend, the Hero, Jinrui Uragittara Osananazimi No Yuusha Ni Buttobasa Reta

Ramon Marknight, a human who allied himself with the Demon King's army, became a legendary figure of infamy, remembered as "the devil incarnate" for the countless human lives lost due to his actions. Thought to have perished in the war, Ramon awakens 1,000 years later in a drastically changed world. As he navigates this unfamiliar era, haunted by the weight of his past deeds, Ramon must confront new challenges, uncover the truth behind his resurrection, and decide whether he will remain the villain of history—or forge a new path.