In "Heart to Heart" Chun Jun Myung and Choi Kang Hee verified that they had romantic feelings for each other.

On the 9th episode of tvN Friday/Saturday drama "Heart to Heart" broadcast on Feb. 6th, Ko Yi Suk (played by Chun Jun Myung) and Cha Hong Do (played by Choi Kang Hee) understood that they had misunderstood each other. As they resolved this, they understood their true feelings for each other.

On this day, Cha Hong Do coincidentally found Ko Yi Suk sitting and hugging his ex-girlfriend Woo Yeon Woo (played by Hwang Seung Un). Cha Hong Do first had assumed that it was a patient, but after thinking a bit more, she remembered that this was his ex-girlfriend. With this, Cha Hong Do said, "How could you do this? That woman is your ex-girlfriend!" Ko Yi Suk said, "Are you done judging? You don't even ask me what the situation is but I'm suddenly a jerk and you're the victim? At the end of the day, you were only worth three months of time. Let's end this." With this, he broke up with her.

Afterwards, Ko Yi Suk called Cha Hong Do first. However, Ko Yi Suk did not know that Cha Hong Do had picked up and talked with Ko Se Ro (played by Ahn Se Hee). Ko Se Ro saw lipstick on Ko Yi Suk's clothes and talked about his complicated love life.