Ryuu ga Gotoku Japan

Kiryu Kazuma was brought up in the Sunflower Orphanage, and has been protected since his childhood by a lieutenant of the Dojima Family, affiliated with the Tokyo-based Tojo Clan of the Japanese organized crime syndicate, the yakuza. His back covered with a tattoo of a dragon, Kazuma soon becomes a prominent member of the Dojima Family - until he takes the blame for the murder of its leader in order to protect his best friend, and is sent to prison.