Robotics;Notes - Season 1 - Eps 21: Gunvarrel Takeoff!
Whilst everyone else works on fixing up the GunBuild-1, Kaito, Nae and Airi head to Kimijima's lab to retrieve data for the device Sawada gave him, although Kaito undergoes a seizure when he attempts to activate it. Just then, they are confronted by some armed droids run by Kimijima and Sister Centipede. However, Sister Centipede manages to have the droids shoot each other, only to be erased by Kimijima shortly afterwards. Meanwhile, as Akiho and the others complete the GunBuild-1, which she renames the Super GunBuild-1, she reunites with Ken'ichirō before learning of Kaito's condition. Despite his injuries, Kaito insists that he be Super GunBuild-1's operator, believing that the device Sawada gave him can trigger his Slow-Mo at will, giving him a chance against the Sumeragi. Akiho objects, however, believing using the device could kill him. Kaito assures her that he will help her meet Misa face-to-face again, giving her the Slow-Mo trigger.
About Robotics;Notes

Title: Robotics;Notes
First Air Date: 2012-10-12
Last Air Date: 2013-03-22
Status: Ended
Rating: 6.9/10 (from 18 votes)
Language: JA
Seasons: 2
Total Episodes: 22
Network: Fuji TV
Genres: Animation, Drama, Mystery, Sci-Fi & Fantasy
Production Companies: Funimation Global Group, Production I.G
Synopsis
In 2019, Kaito Yashio and Akiho Senomiya are the sole members of the Robotics Club at Central Tanegashima High School in Kyushu, Japan. Kaito is a laid back student and a skilled gamer who is just trying to help Akiho, his childhood friend. She is an energetic positive-thinking girl who yearns to complete the ongoing project of the club: building a functional replica of Gunvarrel, the main robot of a once popular TV series. As they gather new members and try to assemble the robot, Kaito starts stumbling upon secret reports that might reveal a conspiracy of large proportions. Unaware of what he is actually dealing with, Kaito little by little starts discovering clues laid by the mysterious Ko Kimijima.
Cast

Rie Kugimiya
Airi (voice)

Kaori Nazuka
Frau Kōjiro (voice)

Ryohei Kimura
Kaito Yashio (voice)

Sora Tokui
Junna Daitoku (voice)

Yoshimasa Hosoya
Subaru Hidaka (voice)

Yoshino Nanjo
Akiho Senomiya (voice)