It’s offerings explored Gundam events occurring shortly after UC 0096’s Laplace’s Box Incident (Gundam Unicorn) in Mobile Suit Gundam: Twilight Axis.
In it, a pair with Zeon history (a weapons developer and a test pilot) living on Side 6 confront their pasts when they are recruited to join a civilian survey team sent by the expanding Earth Federation Forces to investigate the Axis remnants.
Ark Performance (Arpeggio of Blue Steel, Gundam’s Johnny Ridden stories) came up with the story and designs, Koujirou Nakamura (Arpeggio and Arslan anime) writes.