Born and raised by King Terutaka, the king of the kingdom of Oukoku, who is celebrated as a heroic ruler, and Queen Rei, a proud female warrior from the "Woman Crown Clan," Kouhi lived with the goal of becoming a queen herself one day. Kouhi gained the right to the throne due to King Terutaka's wish to make all his children equal candidates for succession, but there was no precedent for a woman to take the throne in Oukoku.While many of his conservative subjects supported his brother, believing that "women should not be allowed to participate in politics," Kouhi spent his days training hard to develop the "qualities of a king" that were superior to anyone else.One day, an incident occurred that would greatly change the fate of Oukoku and Kouhi...!? The grand founding story woven by the war princesses begins!!