Future 7021

In the future 7021, human life here will be like nothing. The city here is a hell for the poor and a paradise for the rich. Outside the city are all kinds of ferocious beasts. They have IQs as good as or even higher than humans. My name is "Ban". Five years ago, I came to the deep city alone for revenge. Unfortunately, I was outnumbered and was beaten until only one head was left. Five years later, I gathered a group of people and watched them die one by one.