18+ The Daimon

After a wide-scale restructuring, Monjirou loses his job and starts wandering the streets. There, he ends up saving an old man who just happens to be the leader of Eastern Japan's greatest yakuza organization, the Zakuro Group. Suddenly, without warning, this leader decides that Monjirou is the perfect man to succeed him! How does Monjirou adapt to the world of the yakuza? Does he really have what it takes? Find out in this sex-and-violence-filled yakuza thriller!

(Source: Manga Reborn)