The Sound Of Your Heart is a South Korean television series starring Lee Kwang-soo and Jung So-min. The sitcom is based on the webtoon of the same name. The first 10 episodes were aired as a web series on November 7, 2016 through Naver TV Cast on Mondays at 6:00 (KST), and the remaining 10 episodes aired from December 2016. The web series hit 100 million views on Sohu TV and ranked No. 1 among Korean dramas on the site. On Naver TV Cast, the web series has more than 40 million views in South Korea as of February 2017. It is also now airing on Netflix.

So Yi-hyun is a South Korean actress, with starring and supporting roles in Hyena, Assorted Gems, Gloria, Heartstrings, Glowing She, Cheongdam-dong Alice, and Who Are You?.