Heechul and Leeteuk got stuck at the fingerprint scanner while looking around the SM building.

He scanned his fingerprint to enter the recording studio, but was flustered because it didn't register.
It turned out I had gone to the wrong room, and the real recording studio was somewhere else.
I heard the new song "Promise for You" in advance from a Super Junior A&R staff member.
I really loved it because it had that rock ballad vibe full of 90s vibes.