Read manga: Shoukoku No Altair Gaiden - Toukoku No Subaru

manga
Summary:

The curtain rises on an Oriental Reconquista spin-off of Kato Kotono's "Shoukoku no Altair", set far to the east of Rumeliana is the once peaceful and beautiful island nation of Kusanagi, which has been annexed by the larger country of Cinili and fallen into ruin.