Underface.

There was once a boy who pointed a gun at his own father—the head of a yakuza group. Shuji (Ryuji Harada) now runs a bar in Minami, Osaka. Having resented being born into a yakuza family, he had long cut ties with that world. But when a fierce conflict erupts between his father's organization, the Tajima-gumi, and a rival group led by Tokuda (Hitoshi Ozawa), who betrayed them, Shuji gets caught in the middle. As the feud intensifies, it even affects Shuji’s close friends and younger sister. Though he despised the yakuza, the blood of the underworld still runs through his veins—and it's that very blood that begins to drag him into the heart of the battle...