Here's the link to their teasers:

http://www.allkpop.com/2012/06/super-junior-releases-yesung-shindongs-teaser-photos-for-y-free-single

Yesung is one of my biases in SuJu, but I don't know about this photo...and why does Big Bang's "Fantastic Baby" come into my head AS SOON AS I see Shindong's picture? Weird isn't it?