Wow...I somehow feel they are dating! There are some clear evidences - the same tshirt, chrome heart bracelet, Lulu's reaction during Yuri's part, instagram updates etc etc. Also, you can clearly see everybody looking at Yuri around 2.23 to say something. Then the camera focuses on EXO (Note: Luhan). For a split second, Yuri see's the display at 2.26 and says 'Sone saranghaeyo'...You can also see Sooyoung, Hyoyeon, Yoona, Tiffany and Sunny looking at the display at 2.27..They seem more than happy to witness Yulhan moment directly