In a world where magical aptitudes are determined by crests, Alex, the sixth prince of the sacred Luxia Empire, was expected to have a bright future due to his high magical power. However, at the age of seven, he receives a dark crest, changing everyone's perception of him. Dark magic is dangerous, and those who wield it risk becoming demons. Alex, cursed with this crest, is shunned by those around him. He becomes distrustful of others and isolates himself in the palace. At age twenty, the day of the Great Imperial Rebellion arrives. Abandoned, he consumes poison, using dark magic one last time to see something before he dies. To his surprise, he doesn't become a demon; he can control dark magic. Regretting not mastering it sooner, Alex wishes for a second chance as his consciousness fades into darkness. This is the story of a man with a cursed crest who gets a second chance at life.