In the world of Daikuuriku, everyone is born female, and chooses which sex they wish to become at age 17. In this world, the peaceful theocracy of Simulacrum is guarded by magical flying machines called Simoun, which can only be piloted by young girls who haven't chosen a sex yet. The Simoun can activate a magical power known as Ri Maajon that destroys large numbers of enemies…
Takahashi Rieko
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Marie, a former legendary martial artist, now conceals her identity as a human and starts working as a "robot" in the mansion of Arthur, heir to a conglomerate that despises humans. Her human identity must remain hidden—because one slip-up and she's dead! Her naturally emotionless demeanor helps her maintain her "robot" disguise and flawlessly perform her duties, all while…