The Demon King was defeated by the Hero, and peace was supposed to return to the world──or so it should have been. Following the Demon King's death, Succubus, who had grown in power, began to overrun the world. A certain nation of Elves was on the brink of destruction after being attacked by these Succubus. The one who saved those Elves was a human calling himself a "Succubus Hunter"──...!? A gritty Dark Fantasy depicted in an alluring world!