Although the pictures from their magazine have been released for a number of days, Heechul just recently uploaded a picture of himself, with fellow Super Junior member Siwon, on his Twitter account (above). The picture was from their photoshoot in the upcoming July issue of 'Singles' and potrayed a 'gentle detective' (Siwon, of course) and a 'mischevious criminal' (who better than Heechul?) The two fulfilled their roles perfectly, obviously knowing them well with experience. I hope to see more pictures involving Heechul and Siwon though - they look fantastic here!
The 'gentle detective' Siwon

The 'mischevious criminal' Heechul

'Interrogation'