Gachiakuta

Rudo lives in a floating town divided sharply between wealthy residents and poor people forced to scrape by while society's garbage is simply thrown into the abyss below. When he is falsely accused of murder, Rudo receives the same treatment as the city's refuse: he is cast over the edge as punishment. The surface beneath the town is no empty dumping ground, however. Humanity's discarded waste has produced vicious monsters, turning exile into a fight for survival. If Rudo wants to return and seek vengeance against the people who condemned him, he first has to survive this hostile world and learn how to fight within it.