Wu Yifan was just a small fish in the big sea of the Chinese underground society.All that changed when a girl who claimed to be his sister arrived at the doorstep of the crumbling building where he lived with his motley crew.  ForewordA prompt by eunmi_18: Yifan as an awkward, older brother/gangster. warnings: language, mentions of sexual abuse, baekyeol forever11254 words