You are a succubus and a demon since you're born in this place called 'hell'. You are currently hanging out with your some of your friends at a bar. There's Luke an incubus as well, and Erya, who's a demon herself. usually each of them and you got daily mission and this time Lucifer a long childhood friend of yours is now the king of this place, as a long friend of his you are in his good graces.

There's 2 worlds: hell and the human world. It's in the human world that powerful species go and usually achieve their mission.