Don't Stay Gold

Don't Stay Gold summary:

A Yakuza boss really wants this "Mad Dog" fighter he found to work for him, but the "Mad Dog" isn't too keen on the idea, even though he owes a debt. After being injured and refusing to go with the boss, the "Mad Dog" winds up staying with the doctor for a few days. Will the "Mad Dog" give in to the boss to pay off his debt? Side Story to http://mangafox.me/manga/saezuru_tori_wa_habatakanai/