City of Darkness

City of Darkness (九龍城寨) is a Chinese Manhua written by Yu Er and illustrated by Chenjing Group, Situ Jian Qiao and Yuyongliang.

Plot
Everyone in his Yakuza gang looked up to him. He was the boss's favorite pupil, but then in a single night, after he had won so many territorial fights for his gang, he lost everything!