Watch: Yoon Kyun Sang And Kim Yoo Jung Can't Stop Goofing Around On The Set Of "Clean With Passion For Now"

JTBC’s “Clean with Passion for Now” released a new behind-the-scenes video with Yoon Kyun Sang and Kim Yoo Jung.

The clip posted starts off with Kim Yoo Jung playing bodyguard for Yoon Kyun Sang. She even asks for an ear piece to really look like his protector. Yoon Kyun Sang smiles at her playfulness and attempts to match her walking pace.

Yoon Kyun Sang also jokes around with the crew members by pretending to hit them. Kim Yoo Jung laughs at the “action scenes” and applauds the crew for playing along well. She even praises, “You should be an action star.” Then she playfully begs her co-star, “Please stop hitting others. Why do you keep hitting them?” The crew member holds onto his cheek and feigns pain as well. Yoon Kyun Sang jokes, “Thank you for coming to my last production. This is going to be my retirement drama.”

The two lead actors don’t stop there. They pretend to fight each other, and Kim Yoo Jung uses a red umbrella that matches well with her pink suit. After their little martial arts show, they do arm-wrestling on a bench.

Yoon Kyun Sang asks if she wants to grab his wrist, and Kim Yoo Jung coolly says it doesn’t matter but points out that it may hurt him. When he offers her his fingers, she becomes concerned about bending them. During their match, Yoon Kyun Sang doesn’t budge at first, but he eventually loses for her sake. Instead of a thank you, Kim Yoo Jung punishes him with a kick for losing to her on purpose. Yoon Kyun Sang playfully complains to the crew about her harshness.

Although these two actors are mischievous and silly behind the scenes, once filming starts, they turn serious, and the humorous atmosphere changes into a romantic and sweet one.

“Clean with Passion for Now” airs on Mondays and Tuesdays at 9:30 p.m. KST. Check out the video below!