During this broadcast, Hongki talked about becoming good friends with both EXO's D.O. and Xiumin while working on the military musical, 'The Promise of the Day'. However, the 'Radio Star' MCs were more interested in hearing from Hongki about a controversial(?) photo involving him and D.O!
Hongki began, "Well, you see, that was a press event commemorating the Korean War, and we were helping one another put Korean flag pins on our uniforms. We were being photographed then, and I was captured while smiling toward Kyungsoo."
MC Yoo Se Yoon then brought out the "evidence" and showed everyone, causing laughter. Yoo Se Yoon said, "This just screams, 'We were together last night'."
Then came Hongki's turn to explain the situation. He said, "So this is the case. Normally, when people think of Do Kyungsoo, they think of his quiet, calm, and astute image shown on broadcasts. However, being around him all day every day, I've discovered that he is not that kind of person at all. He is very playful, he has a lot of aegyo, and he really likes joking around. But on that day, there was a press crew in front of us. And he all of a sudden made me go, 'Huh?'. We weren't actually supposed to help one another put on the pins. We were just supposed to put it on ourselves. So I received mine and was about to put it on, but then Kyungsoo suddenly moved my hand away, took the pin, and said, 'Hyung, hold still.' I was the one who was totally baffled."
Hearing the story, MC Ahn Young Mi pointed out, "Do Kyungsoo was the one who made the move!"