Group JYJ's Kim Jae Joong played a pretend game of acting like a fanatic fan.

Today, Kim Jae Joong posted on his Twitter, "Junsu, I'm your fan" along with a picture.

In the picture, JYJ's Kim Junsu is filming on stairs while Jaejoong is staring at him from the side, as if he is a fan of Junsu.

Internet users who saw this commented, "Kim Jae Joong seems to be having fun," "So cute," and "Fan pretending must be the trend nowadays."

Photo Credit: Kim Jae Joong Twitter