Hwanhee and Brian continue to leave old and new K-pop fans waiting with excitement as they once again hint at a possible reunion for Fly to the Sky comeback! 

SEE ALSO: Hwanhee's agency H2 Media addresses the Fly to the Sky comeback rumor

Brian left fans in a frenzy as he recently shared on his Instagram, "I wonder who is chilling in the back? Could it be @codename911 aka HwanHee?? Lol... Great things coming soon:)", along with a selca that seems to hint that the two Fly to the Sky members are actively working together on something.

Fly to the Sky made their debut under SM Entertainment with 'Day By Day' in 1999 and went their separate ways as solo artists after their 10th anniversary album 'Decennium' in 2009, but not before becoming the #1 R&B duo in Korea at the time.

Who else is excited for a possible Fly to the Sky reunion?!