Hadou no mon manga

Hadou no Mon summary:

Fujisawa Kenji, 17 years old. Born in Yubari, Hokkaido, a boy with the dream of being a mob member to protect ones around him. After dropping out of school, Kenji went to his local Kumicho, who told him to learn the way of the Yakuza from a man known as "The Master Gangster" - Kujo Eiji.