SDMU-682 A wife swapping 'continuous vaginal ejaculation' battle! The wife... tells the other man's husband to "cum quickly" and gets 100,000 yen per ejaculation if she makes him cum with a pounding cowgirl position! The husband... aims for the prize money and "I'm not going to cum inside him" and holds back ejaculation! He gets super excited seeing his partner cheating and having raw sex for the first time, and gets a total of 16 genuine creampies!

An amateur newlywed couple takes on the challenge of a game where they swap partners, with the wife straddling the other man's partner, and the prize money goes up every time the other man ejaculates raw inside her! The more creampies they can get in the 90 minutes using only the cowgirl position, the more the prize money goes up! It's embarrassing to have sex with another man right next to her beloved husband, but the raw sex feels so good she can't stop moving her hips!