Ore wa Ryuu - Gendai Yuukyouden

The dragon, who had returned to his hometown for the first time in three years, saw a fight between the faces of the yakuza and the deputy, who swirled in the city. And the dragon's anger is at the top of the betrayal of an unexpected childhood friend. In order to restore justice and friendship to this city, Han and the dragon run through the youth bravery road! (from k-manga)