Shuumatsu Nani Shitemasu ka? Isogashii desu ka? Sukutte Moratte Ii desu ka?

Five hundred years have passed since humanity went extinct at the hands of the fearsome "Beasts." Even up in the sky, where the surviving races dwell on floating islands, these monstrosities constantly threaten to bring death and destruction. Only a small group of young girls, the Leprechauns, can w