SEE ALSO: Elementary school stabbing in Daejeon leaves 8 year old girl dead, teacher injured

The couple made their relationship public by openly expressing affection for each other via Instagram. 

On July 24, Kim Jun Hee shared a message of appreciation and encouragement for her boyfriend after his win in body building tournaments. She stated, "You worked so hard. You're amazing. My man is the best." She also added the hashtags, "#My first lovestagram"

???? ??? ???? ????? 1?? ???? ??? ???1??? ???? ?? ????? ? ?? ???? ??????? ??? ??? ???? ??? ?? ??? ???? ?? ?????? ??? ?? ??? ???? ???? ??? ? ??? ?? ????? ?? ???? ?? ??? ????? ????? ??? ??? ??? ??? ?? ???? ??? ???? ????? ??? ???? ???? ?? ?? ??? ?? ?? ?? ????????!!! ?? ??? ??? ? ???? ?? ??? ? ???? ?????? ?? ??? ??????? ???? ?? ????? ??? ??#????????? #??? #????? #?????? #1???????

A post shared by Junie Kim??? (@evajunie) on Jul 24, 2017 at 6:34am PDT

Lee Dae Woo also expressed love for his girlfriend on Instagram. He wrote, "I'll be your best supporter from now on. I love you so much and I love you. My love. I love you."

Before the couple made their relationship public, Lee Dae Woo has shared pictures with the star on social media. 

Meanwhile, Kim Jun Hee's label D Most Entertainment commented, "We were completely unaware of Kim Jun Hee's relationship. We're currently checking with her."