Shows like I'm Quitting Heroing

Hero Leo Demonheart had once saved the world from a demon army's invasion. However, he was feared and ostracized by people afterwards for his deeds, and no one would hire him ever again. Feeling that his skills would be better appreciated elsewhere, he joins the demon lord's army that he once fought. Now in a new work environment, Leo strives to use his skills and revive the demon army which he had reduced to the brink of collapse.