Kengan Ashura [Vol.0]

The Kengan Matches, where conflicts between corporations are settled with fistfights.
These prologues give a glimpse into the backstories of the fighters who fight in these matches.
Imai Cosmo, a jiu-jitsu prodigy who fights on the side of his high school life.
Wakatsuki Takeshi, a boy born with a special condition making him unable to control his strength.
Kaolan Wongsawat, the proud Thai boxing champion, etc.
An omnibus of the fighters' stories continued with Kengan Ashura volume 1.