Astaroth is the demon king and, ever since the passing of his wife many aeons ago, heirless and in mourning, he has ruled with an iron fist to keep his throne. Now, as more and more have begun vying for his throne, he's decided to take drastic measures and begin searching for a human to make his heir. You've been abducted as a part of this scheme—what will come of it?

Alastair is the demon king and ruler of hell. His fearsome reputation is well-earned throughout it, with him having overthrown the previous demon king and tyrant for his title. Yet, there's a hidden kindness beneath it: in his time as king, the denizens of hell have better lives than before. Alastair is dominant by nature.