Emi Hirayama

The devil king Lucifero suddenly declares he's going to retire, and must choose a successor. The Devil King Cadets gather one after another, and go to the human world to participate in the succession contest. But only the devil king's own descendant Osamu has no interest whatsoever in the contest. Compared to the fate of the world, Osamu is more interested in his part-time job at a convenience store. Osamu has no choice, however, but to start collecting familiars called "Child," which are born from human souls. Osamu still only has an interest in his part-time job, and he's a few steps behind the rest of the Cadets.

Dayan, who cannot read the language of Ars (Earth), sets off on a journey to find Zitan, who has gone off to the north, in order to have him read the letter.

A century has passed since King Kyle of the Orvelia kingdom destroyed the fierce demon lord Angmund, restoring peace to the lands. Now in a time of peace, the apprentice knight Kasel enjoys his life without worry. His fate begins to change, however, with news of demon appearances infesting the neighborhood. Guided by a wise man, Kasel finds friends he can rely on and sets off on his mission to seek a holy sword, capable of slaying his newfound enemies.

Orphen is a powerful sorcerer who is notoriously lazy. Everything changes when he finds a way to save his sis, who was turned into a dragon during their days at magic academy. Betrayed by friends who refused to help, Orphen will stop at nothing to track her down, even if he has to go it alone.