Looking for a modern fairy tale which involves a robot? Served.
The key elements of a fairy tale are all there, but the author decided to mix a bit the roles, making the story even more funny and amazing. The princess is the prince and the prince is the princess, where the villains are the only ones who keep being actual villains (with some final surprises). Also, the romance is not the sole fil-rouge along the story, but actually there's a content made of amusing entertainment, which lighten the story even when more dramatic parts show up.
I found the plot original in its nonsenses, just because I considered it as a modern fairy tale. So I could even justify some parts, which out of context would sound unbelievable, but which give to the story continuity and genuineness instead.
The actors are brilliant, not only the leads, but also the support ones. Chae Soo Bin and Yoo Seung Ho are constantly immersed in their roles, and successfully render their characters credible and funny.
The only thing I found obnoxious is the split of the traditional 60-75 minutes lasting episodes in two parts of 30-35-ish minutes each: since the show was originally clearly intended made of 16 episodes of the usual duration, very often the transition from odd to even episodes lead to just rudely interrupt a scene.
Amazing, and worth watching.