'Secret Love Affair' Kim Hee Ae's boss Shim Hye Jin realized the relationship between Kim Hee Ae and Yoo Ah In.

On the ninth episode of the cable channel JTBC's "Secret Love Affair" which aired on April 14, 2014, Han Sung Sook, played by Shim Hye Jin, ordered Oh Hye Won, played by Kim Hee Ae, to teach Lee Sun Jae, played by Yoo Ah In, piano all by herself. Han Sung Sook called Oh Hye Won in and asked her to take care of Lee Sun Jae. Oh Hye Won said, "I will try to come up with a way to make this work. The results have to be good." Han Sung Sook said, "Do not worry too much about it," and smiled at her. In related news, cable channel JTBC's drama titled "Secret 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.