After Kaji points out to Baku that the slot machine he was on likely will have a "battle bonus", subsequently letting him win the jackpot, Baku decides to help Kaji remove his debt from loan sharks. Note that throughout Usogui, Baku will proceed to eat a kariume after every time his plan works successfully; possibly indicating that meeting Kaji may have been planned as he eats a kariume after deciding to help.