Ao's just your average first-year high school student—nothing special. Then one day a Frame Arms Girl named Gourai gets delivered to her by mistake, and when Ao powers it up, she accidentally becomes the only person on the planet with that particular model. She has no idea what she's gotten herself into, knowing basically nothing about Frame Arms Girls or plastic models in general. But once she finds out that winning battles gets you prizes, she figures why not treat it like easy money. So she decides to give it a shot, running Gourai through a test battle to see how this whole thing works.
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