Because It's the Product of Our Blood, Sweat, and Tears
While the others go to a festival in town, where they also run into Nae, Kaito helps Kona continue her search for cheaters, introducing her to Airi and telling her about the Kimijima reports. The next day, the club assembles the top and bottom halves of GunBuild-1 together, completing its construction, although Akiho worries that she hasn't heard from Misaki. As a large amount of people come for GunBuild-1's first test run, Kaito pilots the robots and gets it to take its first steps. However, due to the outdated construction which also results in the diesel engine failing, it fails to leave an impression on the crowd, much to Akiho's dismay.
Aired 07/12/2012EP 9 - Because It's the Product of Our Blood, Sweat, and Tears

Robotics;Notes
2019, Divergence Ratio 1.048596 (Steins Gate worldline). The near future, where a device popularly called the PokeCom, packaged with PhoneDroid OS, spreads, bringing the Augmented Reality world close to existence.
Central Tanegashima High School's Robot Research Club is in danger of losing its club status. Kaito Yashio, one of only two members, is only obsessed with robot fighting games, showing no interest in the Robo Club even in this situation. The reckless, useless club head, Akiho Senomiya, aims to complete a giant robot, struggling hard to avoid losing the club's status.
Then, one day, Kaito discovers the A.R. annotation that becomes the Kimijima Report. Written in that report is the indictment of someone named Kou Kimijima's conspiracy involving the world.
(Source: VNdb)