you only need 3 coins to challenge the chief, so I found that during the "fight" if you increase your speed and max out once you start climaxing to hold down the Z Key, you can empreg her in one shot, it's kinda hard to get down the rhythm for it but once you figure it out, the fight is easy
fighting the chief finishs the game so you move into the Chiefs house, if you only gave her the three you can have fun getting the rest and you can walk around with your loincloth off and you can turn in the coins in the store? next to the merchant girl and get different outfits and stuff to change the gals, to change them you go to the dresser in the Chiefs house (now yours)