Kim Soo Hyun′s younger sister has made her debut as a singer through the High Society OST.
A rep from SBS drama High Society stated to Newsen on July 22, "Kim Joo Na, who sang on the High Society OST, is Kim Soo Hyun′s younger sister. It′s difficult to address in detail [regarding the family relationship]." Kim Joo Na stated via SNS on July 21, "The song I sang for the High Society OST is finally out. I ask for your interest and love. I will work hard from now on. Thank you."
High Society is about a chaebol daughter, Jang Yoon Ha, played by Uee, and Choi Jun Ki, a man trying to climb the social ladder, played by Sung Jun, as they discover the true meaning of love despite their class differences. It′s a mystery melodrama that relays a message of hope for today′s youth.