Summoned as the Villain in his own Eroge, Lucifer finds that out of the seven possible routes, he was summoned as the worst and most dangerously attributed Devil. How will he resist his own Destiny of losing his head to the Warrior of the Holy Goddess— The Hero? How will he defy the restrictions of his own creator? Just like everything else, he will accomplish everything step by step... or in his case, Girl by Girl.