Some of the romance drama I liked: City Hall, Yamato Nadeshiko Shichi Henge, Dal Ja's Spring, Last Cinderella, Sungkyunkwan Scandal, Heart to Heart, Buzzer Beat (the main genre is sport, but I found the couple really sweet), The Princess' Man, Hana Kimi (2007), Save the Last Dance for Me, Witch's Romance, Nodame Cantabile (it's more about music, but I liked them as a couple ^^)...