i am looking for a yaoi manga that has a story about a guy who is living w/ his dad and little brother and his dad is somewhat of a ditz and he borrows money from a yakuza group but when it was time for him 2 pay them back their money he couldn't pay them back so he sold his son to the yakuza and his son ends up becoming the yakuza boss's lover and he does that but his dad doesn't take his little brother and leave duing the night or anything like that well that's all i can remember about the story if u can help me figure out the name of the manga that the story is in then thankx alot

Maybe the 4th chapter of Oyasumi Darling? Haven't read it, though.