I can't remember exactly, but I'm pretty sure it was one of these:

Gokusen
GTO
Bloody Monday
I believe it was Triangle of which I said
"This was a totally gripping mystery drama. In these days of multiple plots, it was rather refreshing to see a drama that had only one. I do like the multiple plots. But as they say, a change is as good as a rest,
8/10
Seigi no Mikata
Not as good as the manga :(

Ouran High School Host Club. Not my first drama in general but this was the one that really kick started my love dramas.
Zettai Kareshi ♥
1 litre of tears....

;_;
Pretty Guardian Sailor Moon <3 (it's live action of the anime series) :)
Itzakura no Kiss... Is that spelled right?
Bloody Monday ♥
Mischievous Kiss: Love in Tokyo
I think it was Nagareboshi.