Katagi Modoshi

Katagi Modoshi (カタギモドシ) is a Japanese manga series written and illustrated by Kiyoto Shitara.

Plot
"If there is a wild beast that has strayed from the path, I will return it to the right path." Aizawa, a high school student whose father was killed by a "Gokudo" in Tokyo, is desperately searching for the criminal. His purpose of seeking overwhelming power along with information on the criminal is revenge, or...? Katagi's anger kicks in the yakuza society where violence is rampant!!