バビロンでは、町はナボポラサルという主人公の父が新しい王として権力を掌握することを祝います。主人公であるネブカドネザルは、王としての地位を確立し、力と野心に満ちた困難に満ちた旅に乗り出すことを計画しています。一方、バビロンの新しい王は酒宴に耽りながら、自らの統治を脅かす予兆に気づかずにいます。ネブカドネザルの物語は、若き支配者の栄光への道のりを描いた魅力的な物語であり、驚きと裏切りに満ち、あらゆる転機で彼の決断力を試す漆黒の存在が迫ります。

The story follows Virgil, a half-devil, half-angel who is the last surviving member of his clan. His father, driven by greed and lust for power, killed everyone else in their clan and then turned on Virgil, sending him to the underworld where he was raised in captivity. As Virgil grows up, he discovers that he has powerful supernatural abilities, including summoning and controlling demons. Virgil decides to seek revenge against his father and the clan who betrayed his family. Along the way, he meets a variety of characters, including his brother, powerful mages, and even some gods. Virgil must navigate a complex web of alliances and rivalries to reclaim his family's honor and bring his father to his knees.

During a school trip, Souta will end up in another world, where several races fight and coexist,from gods and demons to elves and wizards.