Song Joong Ki is such a nice guy!  And he's clearly a good friend to Song Hye Kyo.

Song Hye Kyo opened up a fan meeting to celebrate her 20th year since debut at COEX on November 13.  Other stars like Song Joong Ki and Yoo Ah In appeared as guests, creating a nice atmosphere for fans.

SEE ALSO: Song Joong Ki sings his wife's favorite song on 'The Seasons - Lee Young Ji's Rainbow'

However, the two actors left the stage after their turns were over and Song Hye Kyo's fan meeting continued.  While the actress read a letter of her feelings to her fans, she began to cry, and Song Joong Ki ran back on stage with a tissue and bowed his head at her fans once more before disappearing. 

Fans were super touched by his gesture because it had been a long time since he had left the stage, yet he had clearly remained at the event and even run out to comfort her with a tissue.  The fans had been unable to hide their surprise at seeing him again!

Isn't he a sweetheart?

A video posted by ?? ??? ?, ??, ????, ???? ???. (@songjoongki_aile) on Nov 13, 2016 at 5:46am PST