At first, Yui Hatano resists being held by anyone but her husband, yet her body begins craving the thrill of being taken by another man. Drawn into the Otsuki couple’s scheme, the Hatano couple awakens to the pleasure of swapping partners and finally accepts a foursome with them. Though shy at first, watching their spouses have sex right in front of them unleashes an unfamiliar excitement, leaving everyone wilder and climaxing harder than ever. The final chapter follows the Hatano couple as their newfound NTR obsession carries them deeper into pleasure.