The battle to determine who will be the next king of the demon world takes place every 1,000 years in the human world. 100 demons each own a spell book that allows them to draw out their unique powers, and they must team up with a human in order to fight for their own survival. Gash Bell, a happy-go-lucky but fiercely determined child, is one of 100 demons chosen to fight in this battle. His partner is Kiyomaro Takamine, an aloof junior high prodigy who could learn a thing or two from Gash and his optimistic approach to life. The bond between Gash and Kiyomaro deepens as they continue to survive through many harsh battles in Gash's pursuit to become a "kind king."
The sequel to Konjiki no Gash!!, aka Zatch Bell. Once the battle to decide the king of the demon world, in which 100 demon children fought against each other, had come to an end… the king of the demon world was crowned, and the demon world lived out the rest of its days in peace. Or at least, that was how it was supposed to be. Now, a shocking fact about the current state of the demon world comes to light. And in the depths of their despair, three demon children decide to risk it all for one last chance at survival.
"Perils lurk everywhere in this world! Let me show you how to protect yourself from these hazards, you foolish one!" These are the words of Dangerous Jiisan, who tirelessly watches over his grandson. However, due to his lack of practicality, his attempts at preventing disasters often result in absurd and comical outcomes.