Miki Koishikawa's parents pull her aside one day after school to announce to her that they're getting a divorce. It seems that they met another couple on their recent trip to Hawaii, and hit it off so well that both couples want to divorce each other, swap partners, and remarry. Even more incredibly, the four want to all live together in one household... and the other couple have a boy Miki's age, the handsome Yuu. Romantic Comedy-Drama ensues. Provides examples of: