I finally found this!
This is a very ol' skool drama...
watched this drama on tv sometime ago....long time ago
i was fascinated by the opening theme song...it was so 'grand', but it depict the sad love story of a commoner and the crown prince, very tragic indeed.
Can't remember what's the ending...sort of Romeo & Juliet kinda stuffs...
but well, nice novel (yea, it was based on a novel) and great theme song.