- Season 1 : Four men are assigned to Nanba, the world’s most formidable prison. Jyugo, a man who attempted to break out of prison and ended up extending his jail time; Uno, a man who likes to gamble with women; Rock, a man who likes to get into fights; and Nico, a man who likes anime. A super exciting action comedy about the daily lives of the prison’s inmates and guards.
Season 2 : 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.