Affected by Kouka's destruction, Snowdrop moved up her own plans, taking over the Mitaka transformer substation to secure a steady energy supply and bringing disaster to the surroundings. Arato and Lacia try to stop her, but Methode and Ryo stand in their way.

Once again, Methode appears to stand in the way of Arato and Lacia down in the underground facility containing Higgins. They must also be wary of Snowdrop who had been sent there by a rival super intelligent AI. As the conflict escalates, Arato and Ryo try their best to fulfill their duties as representatives of humanity.