Showing their close friendship and chemistry, Kim Woo Bin and ZE:A's Hyungsik pose together for a couple shot.

Park Shin Hye shared the adorable photos by posting it on her Twitter last November 9. She said, "What am I going to do with these two? If they decide to be a couple, I wouldn't oppose! Myung Soo and Young Do, why do you look good together?"

In the drama, Kim Woo Bin and Hyungsik portray the childhood friends Young Do and Myung Soo. They are seen wearing camouflage prints and armors, and it was revealed that it is for a filming of the latest episode involving a leadership camp and a paintball match. Hyungsik lays his head affectionately on Woo Bin's shoulder, and the latter reciprocates the gesture by putting an arm over his shoulder.

Netizens shared their thoughts by saying, "I love Park Hyung Sik and Kim Woo Bin!", "Myung Soo and Young Do make a cute couple!" and "I wish the next episode was out for 'The Heirs.'"

Meanwhile, Kim Woo Bin made a hilarious impersonation of Hyungsik's aegyo on the November 6 broadcast of "Midnight TV Entertainment". He said, "There is always laughter when filming a scene involving Hyungsik. He's a very lovable person."

Catch "The Heirs" every Wednesdays and Thursdays on SBS.