No Guns Life Vol. 5 (manga)

The war that changed Juzo's life still echoes in the present when the anti-Extended terrorist organization Spitzbergen abducts Juzo's friends. Juzo goes after them, but finds his path blocked by Victor Steinberg, a man with a reputation as a fierce enemy of the Extended. Victor also happens to be Mary's brother, and was once Juzo's personal engineer during the war...