The young Erwin Smith is a rising star in the Survey Corps, humanity's only hope of defeating the man-eating monsters known as Titans. Ruthless and dispassionate, Erwin’s mind is devoted to strategies and intrigue. But beneath Erwin’s feet is another world, the Underground, where humans are born and die surrounded by the garbage the Capital throws away. Here, the criminal Levi survives on his wits and agility. But when these two ambitious men cross paths, who will prove himself stronger?
The origin story of Levi and Erwin.

Satoshi Hase, the writer who brought you technology, and worldviews such hIE and advanced artificial intelligence which appeared in BEATLESS, now takes his place as the World Design Editor in a brand new comic. Taking place in the floating city which was established as AHQ, Mega-float. What is the true nature of this "Magic" used in the near future?