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Simoun

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In the world of Daikuuriku, everyone is born female and must choose a permanent sex upon turning seventeen. The peaceful theocracy of Simulacrum is protected by magical flying machines called Simoun, which can only be piloted by young girls who have not yet made that choice. These priestesses, known as Sibyllae, harness the Simoun's devastating power, Ri Maajon, to defend their homeland.

When the industrialized nation of Argentum invades Simulacrum to seize the secret of the Simoun, war erupts. The Sibyllae are granted an exemption from choosing a sex as long as they continue to fight. Aaeru, a determined young Sibylla with a mysterious past, and Neviril, the leader of the elite Chor Tempest squadron, must navigate both aerial battles and internal conflicts among their comrades.

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