Simoun

In the peaceful theocracy of Simulicram, every 17-year-old maiden undergoes a special ceremony where she chooses her sex. However, only pairs of maiden priestesses can synchronize with the ancient flying ships known as Simoun, which are necessary to defend Simulicram. When the enemy nation of Chor Tempest launches a devastating attack, Aer is recruited to join the Simoun pilots. To earn her wings, Aer must navigate the complex web of emotions surrounding Neviril, the Regina of Chor Tempest, whose heart still belongs to her former partner, lost in a tragic battle that involved a forbidden Simoun maneuver.