Sexual harassment and moral harassment, Lucifer, an angel who serves a black god, can't stand it anymore! If you dig a hole and vent your dissatisfaction, the hole will inadvertently connect to the demon king's room in the demon world. Touching a serious side of the Demon King that he didn't know, Lucifer who was completely fascinated by his personality fell from heaven and wished to enter the demon world, but for the purpose of falling from heaven, he decided to do XXX with the Demon King! ? An ambivalent slightly erotic romantic comedy between an angel who wants to fall from heaven vs. a devil who doesn't want to fall from heaven!