Gio, the demon lord who reigns over the Arobagne Continent, is suddenly summoned to another world in the midst of battle with a hero. The beautiful women who welcomed Gio in this unfamiliar world are: Queen Alisa Est, the queen of the Est Kingdom and Duchess Sheila Eunera, the younger sister of the late Est king. The two of them performed a ritual passed down in the royal family for generations to summon Gio as a hero, entrusting the survival of their country to him in a time of crisis. Believing in Gio as a hero and relying on his power, they tell him about the ruler of the Kirsch Empire, who is invading the Est Empire and claims to be a mage and the Demon Lord Kirsch. Intrigued by Kirsch’s power, Gio decides to become a hero. And as compensation for his services, Gio requests the bodies of Alisa and Sheila! With his overwhelming magic power, he defeats countless enemies, making the bodies of beautiful women as his reward. The story of lascivious Demon Lord as Hero begins!