I saw this shared in SS601 and added another image from Samsung Card website. Did you noticed something about the CF? Aside from the fact that it's on a loop (right-click to remove the loop), the clip focusing on the girl was removed. What a genius! We don't get to see a "dead air" moment (a part where Hyun Joong isn't on it).
Credits to http://www.samsungcard.co.kr + 차가운꽃 @ SS601
Click on the images to enlarge.