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Seo In Guk prepared viewers for the fright to come in his drama, tweeting, "You know that 'The Sun of My Master' is airing today (August 15) on SBS at 10 PM KST, right? hehe Watch the live broadcast!! hehe I took a snapshot with ghosts hehe. I am not scared one bit. Don't you see me smiling??!! hahaha.. I should sleep at a friend's house.. haha..?."

The singer-turned-actor also shared, "Did you watch the live broadcast well? hehe Since the ghosts were laughing, I wasn't scared at all... hehe So what? I can go to the restroom tomorrow..~^^," and shared friendly snapshots with the extras who play the ghosts in the drama.

Fans commented, "Those ghosts are so scary," "Oh my god...So scary!!!! Hopefully, the ghosts don't appear in my dreams...??," and more.

If you're a little freaked out, remember that they're just ordinary people in real life! Did you catch the premiere of 'The Sun of My Master'?