Koishikawa Miki, a high school student, is told by her parents that they are getting a divorce and swapping partners with another couple. The other couple have a son called Yu, whom Miki becomes attracted to after moving in together. (Source: MyDramaList) ~~ Adapted from the manga series "Mamaredo Boi" (ママレード・ボーイ) by Yoshizumi Wataru (吉住渉).