Moritsugu, Miu, and Kouichi are given a mission to assist the retreat of a US Force transportation aircraft and to exterminate the enemy there. It is the first official assignment for Kouichi. Moritsugu and Kouichi team up and take on Masaki and Yuriannu of KATO-KIKAN, who are leading a vast troop of ARMAs. Meanwhile, Miu, who is backing up the retreat of general troops on PAINKILLER, is attacked by a new enemy MACHINA.