The Gangster Brother Who Came from a Small Place

Yakuza Student Series

Please Write a Cool Story About the Underworld, the Existence That Covers the Sky with One Hand! ! ! !

I want to read a book similar to "The Wind and Cloud in Saibei (Those Years in the Bandit City)". I want the underworld to be invincible and cool, no ink, and the male protagonist is domineering!