Tiny but Sweet MOONSUN Moments on Solarsido (a.k.a Solar and her Colleague 1) 

Yeah we all know colleague 1 always shows up on Solarsido. Yeah, ALWAYS.
This vid selectively includes some scenes that could show how YongSun and Byul get along with each other off the camera ;p
(btw, I've finished the editing for quite a long time, so it may not be so up-to-date.)
I do not own these clips. All Copyright reserved to Solarsido.