Reincarnated as the Grand Duke's Third Son

Because of his bloodline, he was prevented from rising to prominence and died as a mercenary. But when he opened his eyes again, he learned he was the son of a grand duke. With the family, status, and talent he so desperately desired, he had no choice but to rise to the top. Thus begins the unconventional noble life of a former mercenary captain who turned into the third son of the current grand duke.