The Anime Lad
A boy lives among the poor in a floating town where the rich enjoy luxury and throw garbage into the abyss below. He is falsely accused of murder and punished by being cast over the edge with the trash. The surface contains monsters bred from humanity’s waste. Municipal disposal has expanded beyond objects.
Super Eyepatch Fox
The rich live above and dump their waste into an abyss. A poor boy is falsely convicted of murder and exiled over the edge. Below, accumulated trash has bred vicious monsters. Survival becomes the first step on a path toward vengeance against the people who treated both objects and lives as disposable.
Gigguku
Gachiakuta builds a floating town where the rich throw their garbage out of sight and the poor scrape by beside them. Then a boy is falsely accused of murder and dropped into the same abyss. Down there, all that discarded waste has become monstrous. The premise turns class contempt into an actual fall, and his anger has nowhere to go but UP!
Father's Basement
The rich literally throwing waste onto a lower world is not a class metaphor interested in subtlety. It works because the false accusation makes disposal personal. A poor boy is treated like another unwanted object and sent into an abyss where garbage has bred monsters. The vengeance premise is blunt, but the social cruelty behind it is easy to read.