Just hours ago, MBC's new drama Playful Kiss premiered and the main character aka Kim Hyun Joong's solo track for its OST (soundtrack) was previewed during the drama. The song, currently unnamed, is a slow-beat ballad genre that expresses Kim Hyun Joong's impressive vocals. So far, Kim Hyun Joong and G.NA are the only artists that have participated in Playful Kiss' OST. I'm sure we'll see more tracks for this drama released in the near future, so stay tuned! Preview begins around 1:05: