These are the official couples in the Special A series.
Hikari and KeiEditHikari and Kei are the main couple in this series. In the beginning of this series, Hikari considers Kei as her biggest rival, but later she falls deeply in love with him. Kei though, has loved Hikari for ten long years in total and gets jealous of any guy who finds her attractive. In the manga, Kei proposes to Hikari in the final chapter, then asks for her reply. However, Hikari says that if she says no, he doesn't win. So Kei says they'll keep at it, then; they'll keep challenging each other. In the end, they become a couple.
Akira and TadashiEditAkira and Tadashi were the first couple in the S.A. They had feelings for each other ever since their date in middle school, but they never admitted it to each other. Tadashi always insulted her as a joke, but she would always hit him back in a "friendly" way. One day, Akira finally decides to stop running away from Tadashi and tell him the truth, and so she did. When she told him, Tadashi felt a sigh of relief and that's when they finally expressed their feelings to become an official couple.
Megumi and YahiroEditMegumi and Yahiro seem closer in the manga than they are in the anime, but they're still a couple in both. Megumi first started dating Yahiro just because she didn't want him causing problems between Akira and Tadashi, but soon develops real feelings for him. Yahiro has rejected and hurt Megumi several times, but soon recognizes that she plays an important role in his life and that he needs her as a great supporter. The two first start off pretty bad but soon find their way to the perfect couple with lots of bumps and turns. Soon the two of them turn out to be a really great couple.