On Monday, Haha uploaded a video with a comment saying "Kim Jong Kook's exercise for fathers! Watch until the end! Haha."

In the uploaded video, Haha's new song 'Busan Vacance' was on as a back ground music and it seemed like Haha filmed the video himself. In the video, Kim Jong Kook is holding up three kids with both of his hands. The name 'exercise for kids' suits the exercise well since Kim Jong Kook is exercising and kids are having fun.

Haha tried lifting the kids up but gave up soon. At the end of the video, Haha wrote a line saying ' MC Haha with Sparta leader with three Haroro friends.'

The internet users who saw the video said "it's really an exercise for the fathers," "Sparta leader, it's so funny," "kids would like it," "all the dads should follow the moves," and "I love Haha and Kim Jong Kook both."