Underworld Empire

Ryan was originally from a large metropolis underworld family. After his father was assassinated, his mother despaired of everything and took Ryan and his younger brother back to the hometown, hoping to live a peaceful life. 
But when Ryan grew up, he injured local gangsters to protect his brother, and he'd gone off the rails for the sake of protecting himself in the gang his friends worked for. 
His career in the underworld transformed him from an ignorant teenager into a ruthless underworld boss. Finally, he created his own underworld empire.