The main romance, which is the core of the drama was executed very well. It never drags as the writer constantly tries to introduce new characters which bring new story lines with them. It is also to be noted that all the characters introduced are fully fleshed out characters rather than being introduced just to create conflict between the main leads. The mystery aspect of the story was treated really well. The main couple had very good chemistry and Son ye Jin was brilliant in her role.

Main issue with this drama is that the secondary romance felt forced. I never felt any chemistry between them. I felt that it was introduced just to pad the runtime.
Final episode was a disappointment to say the least. Too much happens in just this one episode and I felt it was rushed.
Comedic elements felt a little repetitive (it follows the same pattern and usually revolves around the second couple)
Perormances were good overall although i felt Lee ha Na's performance to be awkward. I felt she was trying too hard to be naive and childish that it goes a little overboard.

Overall this drama was ligh hearted in its approach which was surprising.