Photos were from when Shin-hye appear as a surprise guest for Joo Sang-wook KBS show (2011) "SeungSeeung Jang-goo". She revealed how they worked together in kdrama "Ggakddugi" and had to kiss when they first met.
She said, "I was in my third year of high school and although it was an act, kissing was a bit stressing. I worried if I should tell my mom or not. But I saw Joo Sang-wook was hiding in a corner and being more nervous than I was".
When the MC asked him, "Were you really nervous?", he replies, "I wasn't nervous at all. I just mouthwashed, and was concerned about the camera angle and such".