Wataru Yoshizumi

A prelude to Marmalade Boy the TV series. Yuu remembers the day when his parents decided to divorce each other and remarry with another married couple. Toubled by the news, Yuu decides to ... (imdb)

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... (myanimelist.net)

Hagiwara Mio is a 14-year-old TV actress who has gotten popular. One day on a set, she meets Kumagai Ichiya, who tells her that her acting "stinks." Mio is hurt by his comments, but she finds that she can't get Ichiya out of her mind. It turns out that Ichiya is a promising director, who directed a music video for Mio's friend Sawaki Aya, an idol singer. (myanimelist.net)

Two sets of parents divorce and marry each other, while their children Miki and Yuu are caught in the middle and start falling for each other. (imdb)