A harsh winter falls on Fuajarl, the Kingdom of the Sun, when a fierce attack staged by Edel Garden leaves the once prosperous nation kingless and in ruin. Faced with an uncertain future and an impending execution, Fuajarl's heir and Princess, Achea, must gather the last of her comrades and reclaim the kingdom her father once ruled. Mangaka Mayumi Azuma returns to take readers on another adventure in Erementar Gerade: Flag of Bluesky!