From a lineage of elite demon lords, the current demon lord Eugene Satania - Vidorick has one secret way of relaxing from the stress he accumulates in the demon world. Which is to go to the human world under the guise as the human named Sayano Yuuji, mixing into common everyday folk to enjoy himself! Now a rookie-low-class demon suddenly appeared in front of him, named Mist. With a good-for-nothing low-class demon at his side, Yuuji now has to hide his identity at all costs! Let start this suspicious rom-com!