'Love Affair' Yoo Ah In and Kim Hee Ae played the piano together. On the first episode of the cable channel JTBC's "Love Affair" which aired on March 18, 2014, Lee Sun Jae, played by Yoo Ah In, played the piano in front of Oh Hye Won, played by Kim Hee Ae.

Oh Hye Won told Lee Sun Jae to leave, but Lee Sun Jae wanted to see if he had done a good job. Oh Hye Won asked Lee Sun Jae when he started playing the piano. Lee Sun Jae said he started at the age of six. He said, "I just played with it. when my mother left for work, she usually locked the door. The piano we had at home was something the people who lived at the house before us left there. I learned how to play the piano in elementary school. I played after watching the videos on YouTube." He then asked Oh Hye Won if he could play just one more song, and they played the piano together. In related news, cable channel JTBC's new drama titled "Love Affair" is a story of a forty something woman, Oh Hye Won, who is played by actress Kim Hee Ae, and a naïve genius pianist Lee Sun Jae, played by actor Yoo Ah In.