One of my fave OSTs, a song titled 'Love Rain' (사랑비) which is identical to its drama title
I just felt like doing a cover on this, so I did My voice is still a bit hoarse, but if you like to hear a frog croaks then follow this link
https://soundcloud.com/yjgift/cover-love-rain-ost
I think of you from time to time
I can't control it. Suddenly I think of you and smile