Where did the cold demeanor from the drama go?

Get ready for the thrilling romance of the window-display couple, actors Yoo Yeon-seok and Chae Soo-bin in the drama 'When the Phone Rings.' Premiering tonight at 9:50 PM, we had the chance to meet this on-screen couple first. What are they currently excited about on set? How do they view their ideal partners? What score would they give their chemistry? They even reminisced about the CF they filmed together nine years ago! With their undeniable chemistry, are they really the perfect window-display couple? Check out the video now!