i just finished Kleun Cheewit , a  thai drama.  It was the best Hate-Love drama i've seen, because the leads didnt just 'disliked' eachother at first but they really hated eachoter! I'd defenitly recommend that!

Shining Inheritance.

I cant believe no-ones mentioned this. It fits the criteria PERFECTLY. Its my favourite hate to love in Kdramas

Protect the boss

Bridal Mask