Marmalade Boy begins when Miki Koishikawa's parents decided to go to
Hawaii. They fell in love again with another couple by the name of
"Matsuura." Afterwards, they decided to exchange partners with them.
Miki was informed by her parents that they would be getting a divorce
and marry again. She also learned that the couple her parents were intending
to exchange partners with had a son named Yuu Matsuura.
Now, not only does Miki have to deal her new 'family situation' but her sudden
feelings for Yuu.....