Heechul and Min Kyung Hoon reveal a warm teaser image for their 'A Hyung I Know' collaboration!

SEE ALSO: Heechul declares he will not get married after property division talk on 'My Little Old Boy'

Previously, it was revealed that Super Junior's Heechul and Buzz's Min Kyung Hoon, current co-stars on 'A Hyung I Know', decided to sing a duet together to show off their great chemistry, both on and off the screen. The song will babe titled "Butterfly Sleep", a minor rock ballad comparing the feelings of Heechul and Min Kyung Hoon's hopes to remain good friends with the rest of the ' A Hyung I Know' members to that of a man wanted to cherish his memories with his lover for a long time. 

"Butterfly Sleep" will be a little different in that instead of being released on 'SM Station's normal Friday, this time, the song will be revealed on November 19, the same day that 'A Hyung I Know broadcasts! 

What can you gather from their teaser image below?