During the insurrection in Usianawald, Princess Edina escaped to her mother’s homeland, Bayonnia, becoming next in line for the throne. As the only heir, Edina studied everything necessary to ascend the throne, including the laws around her ascension, meaning she was very much aware of the fact that she had to find a husband, and quick.
With some inspiration from the visual novel Light and Shadow, except Queen Cecil raised her as Princess Edina, and then helped Edina escape from King Ducaine III to make it back to her home country Bayonnia. Ducaine III was overthrown by Cayden and Hayden dubbed Duke. Not necessary to read Light and Shadow, can also work as a stand alone original story.