A picture of JYJ Jaejoong playing arcade games was revealed online.
Today he posted on his twitter, "Work hard, play hard," along with a picture.
In the picture, he is focused on playing an arcade game with the hammer in his hand.
Internet users commented, "He looks so focused on the game", "He looks like he's going to fall into the game" and "Maybe he's there to relieve stress."
Jaejoong is currently still on his Asia tour.