Super Junior's Heechul showed off his close friendship with f(x)'s Sulli by uploading a picture onto his personal Instagram. Along with the photos above, he wrote, "Sulli is truth."  

The pictures show off their close friendship in the midst of eating dessert.  Clearly there is a competition going on between the sweet dessert and the sweet friends as Heechul and Sulli pose with cute pouts and V signs.  Most fans would probably agree that Heechul and Sulli won this round with their charm.