Exotic beauties Sumiko and Saya are in the mat room doing some ab exercises. They begin comparing abs and both think they have the better, stronger abs. Sumiko says the best way to tell is with a belly punching competition and challenges Saya. The rules are simple, 5 punches per round and arms up for every other round with a penalty punch for each time someone forgets to raise their arms. Whoever drops from the punches and can't get back up loses. The loser gets knocked out in a hold. Saya agrees to do the challenge and they go at it trading punches to the stomach for several rounds until Saya...

Exotic beauties Sumiko and Saya are in the mat room doing some ab exercises. They begin comparing abs and both think they have the better, stronger abs. Sumiko says the best way to tell is with a belly punching competition and challenges Saya. The rules are simple, 5 punches per round and arms up for every other round with a penalty punch for each time someone forgets to raise their arms. Whoever drops from the punches and can't get back up loses. The loser gets knocked out in a hold. Saya agrees to do the challenge and they go at it trading punches to the stomach for several rounds until Saya drops Sumiko with an extra brutal punch. Saya happily puts Sumiko in a hold and sends her off to dreamland.