Super Junior's Kyuhyun kept his promise to fans by singing "At Gwanghwamun" for the lonely people out there.

SEE ALSO: Kyuhyun releases 'At Gwanghwamun' MV!

Kyuhyun promised to fans early on that if they gave him a #1 trophy on a music show, he would head to Gwanghwamun and sing his solo debut song "At Gwanghwamun" for people who look lonely. The Super Junior member has already had multiple wins, and to show his thanks, he serenaded a couple of lonely girls, who loved the gesture.

Check out the behind-the-scenes clip above!