As Nerval advances toward Leopard in preparation to do battle, Aleida takes off with Takane. Frightened for Takane's safety, Akiha leads the way to the QT-Arms with Honoka and Itsuki right on her heels. Bougainvillea and Mintao intercept Itsuki only to get caught up in Nerval deep-freezing Leopard. While Kazane is appointed alpha administrator and given Morihime, Akiha and Honoka fare no better as they rush to the rescue. Nerval and Aleida accosting the group drives Honoka into a frenzy that inspires Takane to intercede. A big hullabaloo breaks out whose deus ex machina comes when Sakura reasons that sunlight can emancipate Leopard from his icy prison. Kazane and Takane's combined intercession paves the way for Akiha to finish off Nerval. Unfortunately, Xanthippe phases in to carry off Nerval who vows vengeance at next engagement. Akiha's bewilderment at the recent events nearly becomes a comprehensive cerebral computation crash when Kazane and Elle explain that she was born into a family whose role in constructing Nerval and all the brain colonies that came thereafter includes being charged military vigilance thereof -- in this case, against Nerval.
In the year 311 of the Orbital Calendar, humanity has migrated to countless colony clusters in space. A space colony girl named Akiha Shishidou encounters a malevolent artificial intelligence named Leopard that has been installed on a colony.
