吉住渉の原作を元にして日曜朝放送という枠内ながら、若い男女の恋模様を赤裸々に綴った内容が評判となったアニメ版トレンディドラマ。女子高生・光希のお気楽な両親は突然離婚を発表、意気投合したもう一組の夫婦とパートナーを入れ替えるという。あれよあれよという間に相手側の夫婦やその一人息子・遊とまで同居することになった彼女は唖然とする一方、カッコイイ遊を意識せずにはいられない…。
Miki Koishikawa lived a normal life - until her parents tell her they'll get divorced.. She doesn't agree, until she meets Yuu Matsuura... the handsome son of another couple, with whom her parents are switching spouses. They all live together now in an enormous house, and Miki and Yuu find themselves falling in love. They'll have to struggle with their own feelings, other people who want to be with them, and whatever Lady Luck and Fate throws in their ways...