My first impression: it’s a cute love story between two university students. With every new episode the story develops well and especially the growing relationship between them both is beautiful.
Not only their unique chemistry towards each other but also their understanding for each other and personal growth is amazing. I rarely saw such a realistic and charming romantic relationship in other series. 
The Story covers every feeling well; from first love and growing into an adult, to the fear of losing an important person, the self-hate because of an incident and the forgiveness towards yourself and others as well as the missing and longing for each other. 
I don’t want to spoil something, but this series is not only pleasant and filled with happily light feelings. In my opinion, this is the interesting part of the series. Yes it’s more realistic than other shows and the way the producers show how individual and multifaceted a human relationship can be is amazing. 

The cinematography is beautiful and the music is well-chosen. 
The stunning visuals are an extra point. Even both main actors are newbies, they acted superior in their first project. I hope we’ll see them in other series soon.