With five billion lives at stake, Akiho declares that she WILL defeat Kou Kimijima! The question is... how?

After a solar storm knocks out power all over Tokyo, robots throughout the city run berserk and attack! Now it's up to Kaito to shut down the robots and save the entire Tokyo metropolitan area somehow...

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.

The Robot Research Club's newest giant robot, GunBuild-2, is finally complete! Meanwhile, both Exoskeleton Co. and Mizuka catch wind of Kaito's activities surrounding Kou Kimijima.

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

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.

The Robot Research Club is in dire straits - there are only two members and the future of the club is in jeopardy. Despite this, the club's leader, Akiho, is intent on building a life-sized robot based on her favorite anime, GUNVARREL!

The Robot Research Club is going to be shut down unless it can win the upcoming ROBO-ONE tournament. Akiho and Kaito have to somehow find a hobby robot and master its controls in only two weeks.

Subaru and Kaito start practicing for the upcoming ROBO-ONE world tournament in Las Vegas. During his off-time, Kaito stumbles upon a mysterious room inside the abandoned folk museum.

Subaru seeks Kaito's help for the upcoming ROBO-ONE World Championship in Las Vegas. Meanwhile, Akiho struggles to keep the club funded while Kaito reflects on a life-changing incident.

While Kaito and friends encounter more mysterious phenomena, another solar storm suddenly hits the Earth. Meanwhile, Akiho gets the GunBuild-1 project funded and rolling full-steam ahead!

Subaru and Kaito start practicing for the upcoming ROBO-ONE world tournament in Las Vegas. During his off-time, Kaito stumbles upon a mysterious room inside the abandoned folk museum.

Akiho is elated when a grown-up Nae Tennoji offers to help the Robot Research Club build a giant robot. Meanwhile, Kaito is caught in a typhoon while searching for the elusive Kimijima Report No. 2.

Akiho is elated when a grown-up Nae Tennoji offers to help the Robot Research Club build a giant robot. Meanwhile, Kaito is caught in a typhoon while searching for the elusive Kimijima Report No. 2.

The Robot Research Club is shocked to hear that not only has Doc been rushed to the hospital, but he's also considering closing his shop. Junna tries to encourage him to keep the shop open, but her fear of robots makes it difficult. 

With five billion lives at stake, Akiho declares that she WILL defeat Kou Kimijima! The question is... how?