Board Thread:General Discussion/@comment-28374733-20161223145930/@comment-30722106-20161223201730

That's definitely a glitch. This is part of the Kakao version of Cookie Run. He is wearing traditional clothes (Hanbok) for Chuseok (a Traditional Korean Holiday). You can see that Ninetails Cookie also will show the same glitch and you can see her wearing also a hanbok.