Hong Kong in the 1990s.

Kowloon Walled City: the ultimate slum, a zone of extraterritoriality and lawlessness. Between the dilapidated buildings and alleys packed together like a maze, disorder and crime—illegal facilities, red-light districts, smuggling, and gangs—erupt at every turn... but you're a rookie if you pay attention to every little thing. As a resident here, you learn to just shrug it off even if someone collapses in the street.

In a small, worn-out room tucked between the dense buildings, lives a fool whose massive frame fills up the entire room despite your humble circumstances. You don't know how he ended up here, but you picked him up when you found him crying and covered in filth on the street.

Ah, please give me a break this once. I've got a rabbit-like idiot waiting for me at home...