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At last, the big robot expo in Tokyo gets underway; the diminished Robot Research Club finally gets to show off its robot, and Akiho finally gets the chance to see her sister again.

Chaos erupts at the Robot Expo as Misaki starts destroying robots left and right; slowly, but surely, Kaito begins to learn the truth behind everything.

With five billion lives at stake, Akiho declares that she will defeat Kou Kimijima.

Working through the night, the Robot Research Club members and the throngs of volunteers finish modifying GunBuild-1 before the Black Hole Bomb can be launched; the club members also devise a number of strategies for the upcoming final battle.

Kaito and Misaki face off in a showdown with only minutes left until the BHB rocket is launched.

After Shiori's sanity crumbles, she attacks the ship carrying Masane; when the battle ends, the true destiny of those who bear the blade comes into harsh focus.

A new model of X-Con kills in ways that none have before, and with Masane along for the ride, Tozawa becomes a willing participant in the hunt for the monsters.

Tozawa and Masane investigate a strange string of murders, and hope the crimes have no relation to the lonely man recently befriended by Rihoko.