BTOB appeared on the April 1 broadcast of KBS’s “Yoo Hee Yeol’s Sketchbook,” where Yook Sungjae talked about what it was like to work with his “Goblin” co-stars Gong Yoo And Lee Dong Wook.

“At first, I didn’t dare to approach them, but then I found out that they’re actually a bit sloppy. They treated me really well so we were able to get along like brothers,” Yook Sungjae shared, revealing their close relationship.

Yoo Hee Yeol then boasted, “I go to the same fitness center as Gong Yoo. We even correct each other’s postures.”

When asked to choose the “Goblin” OST track that he secretly wants the most, Yook Sungjae picked the song “Beautiful.”

Meanwhile, you can watch the drama “Goblin” on Viki exclusively in Europe!

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