Sora no Woto

Based off of the anime, the story is set in the future on a land that, after being scarred by long-lasting wars, has settled into quiet decline. Kanata Sorami is a 15-year-old girl who fulfills her dream of enlisting in the army and joins a unit of five girls who protect a fortress. The girls also play music that reverberate across the skies over towns without people and seas without fish.