Earlier today, the long awaited ominbus drama "Haru (One Day) An Unforgettable Day in Korea" featuring top stars such as U-Know Yunho, Big Bang, and Kim Bum was released. Well it seems the Korean Tourism Authority also recruited some big names for the OST (Soundtrack) as a preview for a track titled '?? / Ring' by SNSD / Girls' Generation member Tiffany was revealed. Thanks to rapha24mt for the tip and tiffanism.net for sharing. Check out the preview for the track below.