it just looks like editing errors to me, doesn't have any of common AI signs
The image that is on kisskh, i agree is AI edited but in my opinion that image is something that kisskh team themselves edited to match the poster size of the kisskh website, but i bet the original poster posted for the kdrama in itself is not AI generated.
i was only looking at the kisskh update T_T
but only 6 of them are coming out on Dec 26th right?