&quot;The primary male protagonist of the series, Yuu is also the title character, as Miki gives him the &quot;Marmalade Boy&quot; moniker as she thinks that he is like marmalade - pretty looking, yet bitter.    Compared to Miki, Yuu&#039;s character is almost a complete opposite, as he tends to be more detached, less emotional, and less open about his feelings. He admits to admiring Miki&#039;s ability to show her emotions clearly... and it being one of the reasons he fell in love with her. Numerous people comment throughout the series of how he has a good &quot;poker face&quot;. It is shown that Yuu is naturally athletic and smart being able to excel in almost every sport. Yuu&#039;s dream is to become an architect and he leaves to attend St. Andrews high school to study it there. Yuu teases Miki a lot, but this is his way of showing affection for her. Although his first kiss with Miki is a complete surprise for her, the Marmalade Boy Movie, which is a prequel to the TV series, reveals that Yuu fell in love with Miki before they actually met. A few days befor the fateful dinner, he saw Miki when she was out and followed her, witnessing her interactions with the Gastman Team.&quot;     

(Source: Wikipedia)

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... 
(Source: Anime News Network)

[Twitter](https://twitter.com/chikichikiko) | [Instagram](https://www.instagram.com/chikichikiko/) | [Blog](https://okiayuryotaro.jugem.jp/)

Married to [Ai Maeda](https://anilist.co/staff/95487). Previously married to [Nao Nagasawa](https://anilist.co/staff/96037) with whom he has a daughter.

Miki’s life was pretty ordinary until the day her parents told her they were swapping spouses with another couple! Thanks to this unconventional arrangement, Miki now has two new stepparents and a hot new stepbrother, Yuu! Miki isn’t exactly thrilled with her new situation, and though Yuu is super cute, he’s also kind of a jerk. Can Miki sort out her complicated feelings for him and come to terms with her new family?
 
(Source: Seven Seas Entertainment)

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 take a walk, on which he spots a girl he falls in love with at first sight. He decides to follow this unaware girl and falls more in love with her. However he discovers who the girl really is...she's the daughter of his parents' new lovers. 
(Source: Anime News Network)

Set 13 years after the original series, the story focuses on Miki and Yuu's little siblings, Rikka and Hajime.

Yuu Matsura