Asphalt ni Aka

Oharu, the heir to a poor yakuza family whose territory is shrinking due to aging, is worried about the future of his group. His foster father, the young boss Jin, has resorted to extreme measures in order to pay off his superiors.... Even if they considered to earn money, the jobs he could do were limited because yakuza can't open bank accounts. Then he happened to come across a poet who makes handmade accessories, and came up with the idea of creating and selling his own accessories... Anti-social forces, gambling and drug addiction... what is the destination of those who can't make ends meet on the streets?

(Source: Manga Jam, translated)