Gachiakuta - Manga

A slum where criminals descendants live... People beyond the border look down and discriminate them as "tribal people". Ludo, an orphan boy, lives in the slum with his foster parent, Legt, and makes a living using his extraordinary physical abilities. However, one day, he was accused for a crime he didn't commit., and is thrown into the "abyss" that even the slum people fear.