In the company of Sheriff Rao, the prince of demons Beelzebubù, son of King Satan who looks so much like Dabula from Dragon Ball Z, sets out to look for the “phantom spring”, as they call it in the manga, and put an end to the excessive power of the sovereign. And you know what? Almost the best ones are the little devils.
In this context, humans and demons coexist, not always peacefully. The water reserves have now ceased, and the only source of supply is controlled by a plump sovereign who, with unfailing cruelty passed off as benevolence, grants his water reserves at a certainly not negligible price.