A Mecha War Heroes' Tale Beginning with Muv-Luv

A good, upright food delivery worker, born in the new society and raised under the red flag, is inexplicably dragged into the world of Muv-Luv. Reluctantly, he embarks on a grand adventure.

After gaining the cheat ability known as Gundam Bael, he cuts a swath through his enemies. He vows to drive every last one of those alien BETA monsters off Earth and give humanity a peaceful blue world once more.