‘Kare Kano’

Miyazawa Yukino has always been a show-off. She’s always wanted to be Number One, to be the very best in everything, to be adored by all others. Then one day, she meets her match: Arima Soujiro, who seems about as perfect as she strives to be. But no one is quite what they seem … for whenever Yukino goes home, off comes the “ojousama” facade – and on go the headbands, reading glasses, and sweats. Miss Congeniality is in fact a conniving, petty con-artist with a streak of absolute nerdy bliss. Of course, Yukino isn’t the *only* one hiding a secret, since Arima himself isn’t quite what he seems either.
In her eager to become #1, she declares Arima as her archenemy, but then he declares his love for her ..

Descriptions taken from AniDB.net