Faced with a dead bedroom in their 30s, married couple Ichiko and Otoya make the decision to open their marriage to other partners using an authorized cheating system. When Otoya's girlfriend Mitsuki stabs him in retaliation for breaking off their relationship, Otoya is forced to come clean to Ichiko in a bid to win her trust. Yet happily ever after is still a long ways away for the newly blissful couple, as Mitsuki's last, spiteful words translate into performance issues for Otoya, and Ichiko is still hiding secrets about her meeting with a male escort. Meanwhile, Mitsuki's already tumultuous relationship with her husband is about to face new challenges-an unplanned pregnancy rears its unexpected head… Sex, love, and trust. What matters most in a marriage? Find out in the provocative series that's taking the media world by storm!