13화: 코나가 건바렐의 비밀을 밝히고, 카이트가 프로젝트 아툼을 밝혀내며 태양 폭풍이 닥친다.

Kona laments about her past, when her mother left for work one morning and never came home. The group celebrate Nae's birthday while figuring out how to make GunBuild-2 move while Kona had remained confined to her apartment for several months. Akiho and Subaru task Tetsuharu with making a motor from the monopole while Kaito tries to make sense of "Kimijima's Report No. 4", which details "Project Atum": a purported robot rebellion. Akiho gets Nae to beat Kaito at Kill-Ballad which forces him to seek Kona for help with programming the motor. While there, she tells him the results of her analysis of the leaked Gunvarrel episode: subliminal cryptic images were hidden in specific spots. Upon further analysis, more images of a seemingly abandoned building were revealed, containing English alphabet letters. Kona then shows Kaito that the letters were in fact a password to access a hidden website posted two weeks after the cancellation of Gunvarrel on an old hobby website made by her mother 20 years previously, revealing a message: "Gunvarrel is brainwashing propaganda. Solar flares will hit along with terrorist attacks all around the world. I ran away to try and stop them, but they're still out there. Everyone's dead-someone stop them. Project Atum isn't over." Later, Kaito unlocks "Kimijima's Report No. 5", which describes that when the solar maximum reaches its peek, the Earth's magnetosphere will be rendered unstable. Then Committee of 300 will cause something akin to a coronal mass ejection thus destroying a percentage of mankind. Elsewhere, despite narrowly avoiding an explosion, Tetsuharu succeeds in cutting the monopole in half. Just then, a solar storm hits the Kanto region, causing robots to malfunction and go berserk in the city. Meanwhile, Kona discovers someone has hacked her TwiPo account, framing her for the robot attacks and the leaked episode of Gunvarrel. Upon seeing "Kona's post" on TwiPo, Kaito goes to her apartment. Kona initially doesn't answer. Concerned he smashes the glass and rushes inside, horrifically finding her in the bath with a box cutter in her hand, and tearfully begs him for help. (Source: Wikipedia)
에피소드 수
- 9화 · 카이토가 GunBuild-1의 첫 시험 비행을 조종하고, 아키호는 미사키를 걱정한다
- 10화 · 카이토가 부정행위자를 조사하는 동안 모노폴이 붕괴되고, 스바루가 JAXA에 새로운 GunBuild 로봇을 제안한다.
- 11화 · 코나와 카이토가 키미지마의 보고서 3를 해독하고 건바렐의 최종화가 유출된다.
- 12화 · 카이토는 깃발을 모으고, 준나는 로봇 트라우마와 맞서며, 닥은 과거의 실수를 수리한다.
- 13화 · 코나가 건바렐의 비밀을 밝히고, 카이트가 프로젝트 아툼을 밝혀내며 태양 폭풍이 닥친다.
- 14화 · 카이토가 킬발라드 상대와 싸워 서버를 해제하고 도쿄의 로봇 반란을 막는다
- 15화 · 아이리의 디지털 존재와 카이토의 그녀 정체 발견
- 16화 · GunBuild-2 가동 테스트와 Mizuka의 비극적인 외골격 오작동
- 17화 · 로봇 연구부는 해산합니다!