The cold-blooded Demon King, unparalleled under the heavens, lost all his abilities to a crude trick by a female Hero. What is this magic ritual that requires you to give mouth to mouth with a person of the opposite sex? Even I, the Demon King was bested by this oddly suspicious attack?! But no worries, I can always regain my abilities. Even if you’re a succubus, an elf, a beastwoman or the noble hero’s descendant. As long as I can use you to further my cultivation, I will. In order to revive the glory of the Demon Race, this magic called the “Cultivation of Yin and Yang”, I’ll learn it and show you! What do you think about this manga?