SBS’ “My Ugly Duckling” aired a preview on their upcoming episode for next week. It featured the cast hilariously attempting to do laundry on Kim Jong Kook’s abs.

The “Running Man” co-stars and Kim Jong Kook are taking the phrase “washboard abs” to a different level.

The clip begins with a scene where women from a historical drama are doing laundry with a fake caption, asking that it is tiring to do laundry. The speech bubbles showed that the women tell each other that they have heard a new place to do their laundry. It is faster to wash the clothing there.

The video then cut off and showed several footages the co-stars of the “Running Man” as they use Kim Jong Kook as a human washboard. Yang Se Chan yelled that it is working while laughing hysterically.

HaHa then exclaimed that they could do laundry like that. He is amazed that it worked. Ji Suk Jin is continuing to scrub, and the camera pans towards the panel of celebrity moms. Kim Jong Kook’s mother is also part of the panel. They cracked up, laughing because of the hilarious scene.

In the previous episode of “My Ugly Duckling,” they also invited Kim Jong Kook, and he talked about his discomfort when people try to talk about his exercise. He shared some struggles on being athletic, and he commented that he does not exercise because of the girls.

All Kim Jong Kook needs is a woman who will accept him for who he is and accept his body. He continued that if someone likes him, people think that they want him because of his body, but they do not know Kim Jong Kook as a person. They would see that he is diligent and straightforward.

“My Ugly Duckling” will air its new episode on September 27.