In the aftermath of the War of Unification, all the nations of the continent of Eastald are forcefully united under a single ruler.

However, nine years after the end of the war, conflict still remains as rogue Fairy Soldiers and criminals take advantage of the postwar instability.

Zesskia, the empire that now controls all nations within the continent of Eastald, ruled by Emperor Harol but his power is split between him, a Prime Minister, and five Dukes.

Its capital city is Rondacia and its flag is a red crescent moon inside a golden sun whose top half is blue, bottom half is red, and has a thin white stripe down the middle.

It was directed by Kenichi Suzuki and written by Ao Jūmonji, with Haruhisa Nakata and Takako Shimizu handling character designs.