SF9's Chani and actress Kim Hye Yoon shared the story behind their scene on 'SKY Castle.'

The episode with 'SKY Castle' actors continued on the February 7th episode of KBS 2TV's 'Happy Together 4.'

Regarding the scene where Kim Hye Yoon (Ye Seo) accidentally sat on Chani (Woo Joo)'s lap, Kim Hye Yoon said, "It was our second time meeting each other. We weren't close at all and still used honorifics. What was really uncomfortable was that the camera director asked me to stay seated on his lap because he has to set up the camera. I didn't know where to look."

She continued, "I couldn't put all of my weight (on his legs). I wondered if I have to only put half. I asked him if I'm not too heavy."

Chani explained, "I told her no," however, "She was actually really heavy. It would've been okay if she sat on both of my legs but she sat on one. She sat there like that for 30 minutes because of the camera set up." He continued, "Of course, I didn't show it in front of her. I was worried she might feel awkward. I told her she's not heavy at all but I couldn't feel my leg." He jokingly added, "I was limping by the time I was going home."