First of all theres nothing really romantic about teacher kim the title is misleading. The romantic one is kang dong joo. Teacher kim is very stern cold and bad ass . He doesnt have a girlfriend or wife so theres no romance with him. Kang dong joo on the other hand has a great story line and he oozes all sorts of romance. Its a good doctor show and has that one bad guy that wants to destroy the main character all the way to last episode. I watched it weekly so i dont remember the theme song. Anyways good show