Mobile Suit Gundam: Blue Destiny

Mobile Suit Gundam: Blue Destiny (機動戦士ガンダム外伝―) is a manga written and illustrated by Mizuho Takayama, based on the Mobile Suit Gundam Side Story trilogy of video games.

Plot
The story revolves around ace mobile suit tester Yuu Kajima, who tests the latest suits before they are mass-produced. But one day his test goes seriously haywire when he and his teammates are attacked by a mysterious blue mobile suit. Barely escaping from the melee, Yuu finds another surprise waiting for him: the blue machine is actually the Earth Federation's latest Gundam, and Yuu is to be its next pilot. Now, as he fights with the Gundam suit against Zeon ace Nimbus Schatzen, he must race against time to unravel the truth behind this mysterious machine, as well as the awaiting destiny of its pilot.