Loving couples compete in a swapping game for a cash prize of 1 million yen. In this [Shonan Swimsuit Couple Edition], they exchange partners and try to arouse each other as much as possible. First-time meeting couples engage in intense partner swapping! One woman shakes her breasts out of her bikini, trying to get her new partner aroused. Will they go as far as having raw, insertional sex with someone else in front of their own partner, all for the sake of the prize money? Note: The content may vary depending on the distribution method.