With Japan's control in the wrong hands, life becomes more difficult for Hosomichi; he learns about a rebel group that might be the country's only hope for freedom.

Staggering under debts, Hosomichi joins the resistance force and takes control of Shark One, an Arahabaki mech that is powered by battery girl Rin Akagi.

Hosomichi must do whatever it takes to revive Rin after the Garanndoll stops operating.

Arahabaki brings in Yuki Aoba, the only survivor of an idol group named Rabbit Foot; she quickly accepts the chance to become a battery girl and gets Hosomichi to act as her manager; Hosomichi realizes there may be more to being a manager.

Hosomichi must help Yuki Aoba regain the confidence to perform on the stage for her fans.

Things are settling down with the two battery girls, but Hosomichi's regret is catching up to him.