Keeping it mostly spoiler free, this drama is a sht show.
I don't understand how this drama has such a high score. I know people usually are rating kdramas based on actors' beauty, but that shouldn't work here.
So: the plot is dumb and full of holes, the acting is meh at best, the directing and the cinematography are boring, the soundtrack is annoying, the production value seems cheap.
Since the first episode I was annoyed by how the events proceeded. And I mean that in the sense of "FFS!! How much longer until it ends??" But I did went for the second episode, trying to give it a chance. It never got better. The ML is supposed to be the cutest thing ever and he isn't. But thats subjective so I'll let it pass. Unfortunately, the chemistry between our leads is missing.
Then the so called plot. This revolves around an "alien marble" that can resurrect people and transform their appearance based on their soul's "beauty". That gets out the window when a "evil person" is not revived like a thing from a horror movie. In the same episode (2nd), the marble revives some flowers, by itself. Seeing that, shouldn't the marble keep reviving things? Chicken in stores/ in restaurants for example? I have nothing against introducing a lousy plot device (this said marble), but the writer should've made sure to address all these problems.
The characters seem retarded, then they are not, then go retarded again, and so on. To push the story in the needed direction, he author kept making coincidences happen. Or the characters go the "lets keep this info for myself, wouldn't want to end this story too soon" route. In short, the story must go from A to B and the author keeps changing how a character is supposed to act, based solely on "moving forward the plot". Even the "comedy" part is meh.
So: do you like a specific actor/actress? Check out some of their other works. Their potential was better used there (it can't be worse than here)....

PS: I got a headache thinking about what stuff happened in this drama for this review :)))