Kim Heechul & Kim Jungmo (formerly M&D, shortened from Midnight & Dawn or Miari & Dangye-dong) was a South Korean pop rock duo formed by SM Entertainment in 2011. The group was composed of Super Junior's Heechul and TraxX's Kim Jung-mo. Both members decided to write and compose every song the project group released. They'll continuously release music which they can and want to do, regardless of the genre.Their debut single, "Close Ur Mouth" was released in June 2011 under the name, M&D. In early July 2016, SM Entertainment announced that the duo would return as Kim Heechul & Kim Jungmo (김희철&김정모).