Girl group f(x)'s Sulli and idol group Super Junior's Heechul revealed the truth behind their April Fools' prank.

On April 3rd, Sulli changed the title of the picture on her me2day to "Did you enjoy April Fool's day? That was all planned with Heechul oppa."

Heechul previously changed his SNS�account name to "Sulli" and uploaded a picture of Sulli in her school uniform, which caused all sorts of speculation. He also wrote comments on KARA�Jiyoung's page with the new name, pulling a very cute April Fool's prank.

In the picture, Heechul has on a clean suit and is sipping on a drink at an outdoor cafe while looking off into the distance with his trademark cool, carefree expression.
Fans commented, "The prank was really enjoyable," and "It's nice to see the oppa & dongseng relationship between the two."

Source + Image: Osen