The hilarious character posters for each of the four leads in tvN's upcoming drama "Ghost Doctor" have been released!

"Ghost Doctor," directed by Boo Sung Chul ("Heirs"), is a fantasy medical drama about two doctors who are worlds apart in terms of their histories, skills, and personalities, but who end up merging bodies and spirits.

Rain will play Cha Young Min, a brilliant thoracic surgeon, and Kim Bum will play silver-spoon resident Go Seung Tak. Son Naeun of Apink will play emergency room intern Oh Soo Jung, who, although studying medicine, believes in supernatural phenomena and miracles, while Uee will play neurosurgeon Jang Se Jin, who also happens to be Cha Young Min's ex-girlfriend.

Rain's poster shows Cha Young Min, who is dealing with the reality that he now has to rely on the obnoxious Go Seung Tak to get things done. His poster tagline says, "The jerk I despise the most has become my final hope!" as he glares disapprovingly up at the unconcerned Go Seung Tak.

Meanwhile, Go Seung Tak's displeasure at having to deal with the unavoidable Cha Young Min, who hovers just over his head, is shown amusingly in Kim Bum's poster.

"Get lost!" the pompous resident yells in his caption as he tugs at his own hair in disgust. “This dreadful phantom! Why do you come and go whenever you want? Why! Why!”

Son Naeun’s poster intriguingly hints at her character’s future partnership with Go Seung Tak, who attempts to sneakily hide his secret by covering himself up with his lab coat.

Wearing a playful expression, Oh Soo Jung says mysteriously, “You want to cover this up? Then I’ll help for now!”

Finally, Uee's poster shows Jang Se Jin's frantic efforts to save Cha Young Min's life.

"I'm going to save you no matter what," she swears passionately as he floats in the corner of the poster with his heart still pumping. “As a result, you'll need to gather your strength as well!”

"The stories of characters Cha Young Min, Go Seung Tak, Jang Se Jin, and Oh Soo Jung are all highly compelling," the makers of "Ghost Doctor" said. “The hectic hospital life that these four people will create, each with their own distinct charms, will provide viewers with a new and unique form of entertainment. Please enjoy the explosive chemistry between actors Jung Jihoon [Rain], Kim Bum, Uee, and Son Naeun as they discover how they become involved with one another."

The first episode of "Ghost Doctor" will air on January 3 at 10:30 p.m. KST.