On March 21, 2026, singer Kim Sung-kyu shared a fresh update on his official Instagram — a vocal challenge for 'When I Think of You' with ONF’s MK (Min-kyun). In the images, Kim holds a microphone and sings with laser focus. Dressed in a black tracksuit, he looks relaxed yet completely immersed in the performance.
Fans went wild. Reactions poured in like "An amazing song + an amazing voice = art," along with "It's so pretty!! Thank you for inviting Minkyun to the challenge!" Admirers praised Kim Sung-kyu’s vocals and visuals, flooding the post with positive comments.