"I, who know all the world's secrets, will change this doomed future!" In a world where dungeons exist, Yuya Shirasaki, an awakened warrior, risks his life to conquer them, aiming to earn enough for his ailing sister's medical treatments. Yet, despite his efforts, his sister dies, and Yuya himself falls to the mightiest of monsters—or so it seems. In the instant before his death, Yuya awakens the forbidden skill, Akashic Record, allowing him not only to gain all knowledge but also to return ten years into the past. With a second chance at life and armed with the wisdom of both past and future, Yuya sets out to rise at an unstoppable pace in this monster-filled world. "If it's to save my sister—and this world—then I’ll become the strongest there is!"