Sejeong & Sungjae
Gugudan's Sejeong and BTOB's Sungjae in 'Law of the Jungle - Sumatra.' youtube.com/SBS Entertainment

BTOB's Yook Sung-jae recently confessed to being stressed out during filming of his scenes for 'Goblin.' He added that listening to a song by Gugudan's Kim Se-jeong helped him relax after a hard day on the sets of the tvN fantasy drama.

On the March 24 episode of 'Law of the Jungle' that was set on Sumatra, Sungjae and Sejeong were paired up. During the episode Sungjae revealed to Sejeong that he would often listen to her song 'Flower Road' after a stressful day filming of 'Goblin.'

"I listened to this song a lot when I was going through a hard time while filming for Goblin," Sungjae said while singing as few lines of the song before going off to sleep, as noted by Koreaboo. Sejeong was a little surprised, and obviously very happy at the revelation and responded, "Really? I feel very proud."

Koreaboo mentions that the two idols didn't know each very well prior to filming. However, Sejeong herself had, during a pre-show interview, expressed desire to get closer to the 21-year old idol. Sungjae then proceeded to ask Sejeong about the meaning behind the name of their girl group 'Gugudan.'

"Our group name means 9 members with 9 different charms. All of the members are nice, there's no one that is difficult to get along with," the 20-year old singer said. Sungjae also added that the BTOB members have never had a fight between them as all are good at heart.

In the episode, Soompi notes Sejeong maintained her natural appearance by wearing glasses, having her beautiful hair curled with hair rollers and using sunscreen instead of lotion. Sungjae looked at her roller and asked if he could borrow one extra off her as he has long hair falling over his eyebrows too.

The two idols can be seen lying on the steps of some old building with uprooted coconut leaves and objects scattered everywhere. It's a beach area by a lake with beautiful mountain scenery in the background - Perfect place to relax and de-stress amid nature's beauty. Watch the clip below.