Yakumo<3's manga / #debt(21)

The uke is in real problems, because of his gangster dad who passed away and left him with massive debt. His mother run away. He has worked hard for years in high-end casino, and isn't gonna give up. Suddenly suspicious customer offers a deal, which is practically selling himself to him for lot of money. What will he do?

The uke has lived with his adoptive dad and brothers as long as he remebers. They are poor and have had always a lot of debt, so he's ready to save the family by any means, even theft and prostitution. By a coincidence he meets rich man, who seems to want to keep him around. What kinds of secrets does the man know of his past?