On March 25, 2026, Shim Euddeum shocked Instagram with a feel-good update: photos of her enjoying a tunnel run with a friend who started singing mid-jog. She captioned it, "A younger friend who sings for me while we run? Wow, unbelievable—my ears are in heaven," capturing the joy of the moment. Fans flooded the comments with reactions like "Wow, total vocal queen" and "When is Seogi dropping a track?" The two laughing as they ran together left a striking impression.