And yes it's a bit short and left me wanting more at the end. I mean, I just want to see his cute smile all day (yeah I know, that won't be called a teaser then)! But... I'll take a briefly moving and dancing and laughing Gil-ro any day. January 25th, why are you so far away?
P.S. After paying close attention, I think Gil-ro is the one from 00:01s to 00:05s, while Joo Won (the one who is laughing and looking a bit awkward) is the one from 00:06s to 00:10s