The story takes place in a country by the name of Popolocrois in which the people live peacefully. King Paul is a kind-hearted man who entered into a marriage with one of the daughters of the Ryuu clan, Sania, in order to overcome the barriers between the different races. The Queen soon gave birth to a child, Prince Pietro, who will play a significant role in bridging the gap between the humans and the Ryuu clan. This series is was discontinued.

An excerpt of Popolocrois Monogatari was digitally published in English as Popolocrois Story by XSEED Games on February 5, 2016.