Veteran | 베테랑 (Gag Concert / 2016.04.23) 

She looks like Qri.

in the beginning, they said they haven't practiced with the sound director for the performance, but since they are veterans, they can act naturally by only hearing the sound the director gave during the performance, so they kept following the sounds... haha Im a lil bit confused when I first saw this episode, too, but I find it funny now :)

thanks

@@mysteriousworld2686 and it is way funnier that way