&quot;The student body president and a third year student. Many girls are interested in him, but he is only interested in Meiko, and tries to get her to like him in place of Na-chan. His crude sense of humor however, do not sit well with Meiko, who believes him to be irresponsible and a playboy. They do go out for a time, but Meiko is unable to overcome her feelings for Na-chan. After Satoshi tries several times to make her forget him, following the Hiroshima arc he sees that he has no chance to win her over and stops his romantic pursuit of Meiko, staying friends with her instead.    Satoshi is the first person to notice Yuu's interest in architecture, and his initially unusual behavior towards Yuu arouse Yuu and Miki's suspicions that he is gay and has a crush on him, which he uses to his advantage. Satoshi and Yuu eventually come to an understanding however, and Satoshi helps Yuu try to uncover the truth of who his actual biological father may be, as he suspects that his father Yoshimitsu is a potential candidate. It is revealed however, that Yoshimitsu is not Yuu's true father, but Satoshi and Yuu stay best friends after this.&quot;    from 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...<br><br>
(Source: Anime News Network)

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?
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(Source: Seven Seas Entertainment)

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

Satoshi Miwa