In the Shadow World, everyday existence is marked by chaos and disaster. Desir Herrman, a commoner magician, relies on his exceptional abilities to enter the Shadow Labyrinth, the highest point of the Shadow World. However, when his party fails to clear the Labyrinth, humanity faces ruin. This outcome should result in Desir's death, but instead, he is sent back in time to his childhood days at Hebrion Academy. This marks his second chance. Will Desir be able to refine his magical skills to save humanity on this second attempt?