There are a few times when I rated a drama with 9. But this one really desrves it. The couple was adorable, and they had great chemistry which helped a lot with the progress of the story. Actually, the love story was really good, sweet and cute. I espicially loved the leading lady, who was fangirl goals. The addition of that in the plot mix was very clever. The plot, in addition, was well constructed and the story didn't get boring or frustrating. The events followed one another, even though the plot twist in the end was too cliche, as it has happen to too many dramas, but I will forgive them since the rest of the show was good. I also enjoyed the OST.
So, 9 out of 10.