If your panties get stained, you're out! Women participating as monitors for a certain underwear manufacturer will get paid if they can withstand a relentless attack while in an M-shaped position!!! How many will be able to endure it!?

パンツが染みたら即アウト！某下着メーカーのモニターとして参加した女性たちがM字になって執拗な攻めに耐え抜けば報酬GET！！！果たして何人が耐えられるのか！？