On March 18, 2026, Palm Tree Island announced via Instagram that Kim Junsu will appear at the 'Sound Planet Festival,' sending fans into a frenzy. The post features Kim Junsu smiling brightly, standing between microphones as if deep in thought.
With the message "My Sound, My Planet," Kim Junsu teased his “landing” on Sound Planet, heightening anticipation among fans. One touching comment on the post reads, "Where his song is, that's the planet we stay on."