The 150-year-long stalemate between the two interstellar superpowers, the Galactic Empire and the Free Planets Alliance, comes to an end when a new generation of leaders arises: the idealistic military genius Reinhard von Lohengramm, and the FPA's reserved historian, Yang Wenli. While Reinhard climbs the ranks of the Empire with the aid of his childhood friend, Siegfried Kircheis, he must fight not only the war, but also the remnants of the crumbling Goldenbaum Dynasty in order to free his sister from the Kaiser and unify humanity under one genuine ruler. Meanwhile, on the other side of the galaxy, Yang—a strong supporter of democratic ideals—has to stand firm in his beliefs, despite the struggles of the FPA, and show his pupil, Julian Mintz, that autocracy is not the solution. As ideologies clash amidst the war's many casualties, the two strategic masterminds must ask themselves what the real reason behind their battle is.

Nanba is the world's most formidable prison, built to incarcerate criminals who are too slippery to stay in ordinary confinement. The four inmates who occupy Cell 13 are particularly cunning on that behalf, having escaped every other prison with a perfect success rate. There is Juugo, a specialist in locks who has spent the majority of his life in prison; Uno, a gambler with great intuition; Nico, an otaku whose body reacts strangely to drugs; and Rock, a bruiser with a love for food. The daily shenanigans of the four prisoners always cause trouble for the building supervisor, Hajime Sugoroku, who desperately tries to prevent them from breaking out of Nanba. Nanbaka follows the comedic, sparkle-filled exploits of these prisoners and their guards. From three square meals a day to sports festivals, prison life in Nanba isn't actually that bad—and it is the closest these four have to a home.

The second part of Nanbaka. The prisoners and their guards continue their comfortable lives at Nanba Prison. However, from the shadows emerges a new threat: Enki Gokuu, a person from Samon's past, who has mysterious goals of his own.

It is the dawn of the 21st century. Mankind has terraformed and colonized Mars. But we are not alone in the universe. An ancient race of alien beings, known only as "The Gods," has been watching mankind's progress ...and waiting. Now, these mysterious aliens have returned to halt mankind's expansion into space ...by force. Now, the planet named after the God of War will become our final battlefield, as mankind fights a desperate battle with the latest in high-tech, military hardware: hyper-advanced aircraft, orbital fighters, and gigantic, desert battleships brimming with the most advanced weaponry. But will it be enough? The aliens have awesome, incredibly destructive weapons at their disposal—including "Hell"—an unstoppable stealth carrier. But the alien's primary weapon is insidiously quiet and invisible—a mind control plaque. Incurable. Inevitable. Contagious. Humans are powerless to resist its effects, which transforms even the most loyal soldiers into dangerous subversives. Our last hope lies with Captain Akuh and the crew of the Battleship Aoba. If his top-secret mission is successful, mankind will deal a decisive blow to the alien armada. But Akuh's girlfriend is showing signs of nymphomania—the first symptom of alien subversion! (Source: AnimeNfo)