I would say first half of the drama is good and interesting, but loses its charm in the latter half.
There are many loop-holes. But after finishing this drama, I watched two other dramas immediately.
After completing other dramas when I came back to write this review, all I can remember is how handsome Zhang Zhe Han was and I couldn't remember anything else. This proves that this is an average drama which is good (not excellent) in each area such as romance, comedy, fights, storyline etc.,

Compared to other rom-coms, other excellent plots in c-drama world, in my opinion , this drama is average. It is neither shitty nor an awesomely mind-blowing one that lasts an impression.

Will I recommend you to watch? yes, give it a go.

BTW, I fell in love with Zhang Zhe Han and became his fan after this drama.