Kiraware Ouji No Yarinaoshi ~Henkyo De Yami Maho O Kiwamete, Saikyo No Kenzoku To Riso No Okoku O Tsukurimasu~

in a world where aptitude for magic is determined by a crest. at the age of seven, alec, the sixth prince of the sacred luxian empire, was given a crest of [ dark magic ], which is said to turn him into a demon as soon as he uses it. scorned by those around him, alec became a shut-in in the palace, and in the last days of his life, he used [ dark magic ], which he had never used before, in the hope of getting a good glimpse of it. however, alec's crest was actually a special one that allowed him to use [ dark magic ] without having his body taken over by a demon! he died as he was – but when he woke up, he was back to his childhood! reverting back to his seven-year-old self, alec uses [ dark magic ] to turn all kinds of demons into his dependents, and together with his strongest companions, he builds an ideal country..!