*OOOO..I'm late posting it but I know the truth behind this.
A photo of Super Junior’s Eunhyuk shirtless and IU in her pajama’s is currently going around. The photo was posted onto her (IU) Twitter, (most likely accidentally) and then taken down within 2 minutes.
The photo shows Eunhyuk clearly, but only shows a part of IU’s face. The most shocking part is that the two seem to be lying on a bed, and that Eunhyuk has no shirt on.
Furthermore, fans have pointed out that the pajama is the same one that IU got from her fans, that she tweeted in the past. She tweeted it when she burnt her top after she tried to make ramen.