Texhnolyze

Synopsis

In the dystopian underground city of Lux, entertainment fighter Ichise is forced into a sexual encounter with his promoter's lover in the city's ruling organization, the mafia-like Organo. After spurning the woman, his promoter finds out about this and Ichise runs away to try to escape retribution. However, the promoter locates him and chops off his arm. Meanwhile, Kazuho Yoshii descends from the legendary surface world and journeys toward Gabe, a community that was overthrown by the Organo. On his way there, he meets Ran, a mysterious young girl wearing a white fox mask, who takes him to see the sage. Shortly before reaching Gabe, they are attacked by members of an anti-texhnolyzation group called the Salvation Union.

(Source: Wikipedia)