The upcoming drama “Hwayugi” recently revealed the behind-the-scenes video behind the unique posters for the show.

Lee Seung Gi, Cha Seung Won, Oh Yeon Seo, FTISLAND’s Lee Hong Ki, and Jang Gwang are all serious when it comes to their individual posters, despite posing with fantastic props like animal skulls, golden sceptres, and dressed in over-the-top clothes.

When they start filming together, however, the cast lightens up the mood, playing around with props, fooling around to make each other laugh, and show off their great chemistry with one another.

“Hwayugi” premieres on tvN on December 23 at 9 p.m. KST.

Check out the behind-the-scenes teaser below: