Nanbaka is a silly, fun, and kind of stupid anime, about a high security prison. Think Alcatraz, with Gintama characters. Originally, I saw this and though, "There's no way this can be funny". Fortunately, I was dead wrong! While the humor isn't on par with Sket-Dance (imo), and hasn't reached Sakamoto levels of making me laugh, Nanbaka is a great little show that I definitely see going places.