Togainu No Chi

Akira, the young champion of a street fighting tournament called Bl@ster, is suddenly arrested for a crime he didn't commit. He makes a deal with a mysterious woman to get out of prison on one condition: to defeat the strongest man, the Il-Re, in a deadly game called Igura, which is taking place under the rule of a drug ring in the abandoned remains of Tokyo.

Note: There are two different versions of the Togainu comic by two different mangakas. One is being published in Magazine ZERO, the other is in Comic B's Log. This one is the comic running in B's Log.