Ep. 12: Kaito gathers flags while Junna faces robot trauma and Doc repairs his past mistakes.
Aired on January 11, 2013

Kaito pursues flags for the fourth report despite Misaki’s warnings. Junna visits Tetsuharu in intensive care, but he refuses to see her. Mitsuhiko reveals Tetsuharu plans to close his robot clinic. Mizuka explains that eleven years ago, a robot designed for children fell on Junna, causing her fear. Akiho refuses to let Junna resign from the club until she likes something about robots. Akiho attempts to cheer Doc by fixing his old robots, one of which Kaito needs for a flag. Junna is frightened when the specific robot that injured her is reactivated. As Junna decides to quit, Kaito shows her a photo from the shop. Tetsuharu blames himself for Junna’s accident. Surprisingly, Junna controls a robot, and the two repair their relationship.
Episodes
- Ep. 8 · Nae Tennoji Introduces Herself and the Team Visits JAXA for Robot Support
- Ep. 9 · Kaito pilots GunBuild-1 for its first test run while Akiho worries about Misaki
- Ep. 10 · Kaito investigates cheaters while monopoles fall, prompting Subaru to suggest a new GunBuild robot to JAXA.
- Ep. 11 · Kona and Kaito unlock Kimijima's Report No. 3 while Gunvarrel's final episode is leaked.
- Ep. 12 · Kaito gathers flags while Junna faces robot trauma and Doc repairs his past mistakes.
- Ep. 13 · Kona reveals Gunvarrel secrets while Kaito uncovers Project Atum and a solar storm strikes.
- Ep. 14 · Kaito battles a Kill-Ballad opponent to unlock the server and stop the robot uprising in Tokyo.
- Ep. 15 · Airi's Digital Existence and Kaito's Discovery of Her True Origin
- Ep. 16 · GunBuild-2 Activation Test and Mizuka's Tragic Exoskeleton Malfunction