On March 18, 2026, Kim Sung-kyu dropped a new post on his official Instagram — and it’s already sparking buzz among fans.
In the video, Kim sings into a mic with an easy, relaxed expression. The post’s hashtags include "#널떠올리면" (meaning 'When I Think of You') along with "#THEBOYZ #제이콥 #JACOB #KIMSUNGKYU," signaling he teamed up with THE BOYZ’s Jacob for a vocal challenge.
Fans flooded the comments with reactions like "ANGEL VOICE," "OMY," and "Jacob, meu fascínio," showering praise on Kim Sung-kyu’s honeyed vocals.