This show has a great story of staying by someones side and by being nice to them trying too make someone fall for you. Not a typical depiction, but a really refreshing and pure approach to it.
Unfortunately this show lacked also quite a bit. The show obviously tried to mush to much story within to little time which made a lot of the minor story-lines look unfinished and rushed. They tried to fix this by not putting to much depth in the dialogues, which made them cringe and superficial.

Ok then how did you give this show still a 9 out of 10?
Well the main couple with an huge emphasis on the Lead Actress was unconditionally and ingeniously CUTE! I lost count how many times I almost perished from cuteness-overload.
The lead actress So Ju Yeon was just perfect for the role. She really carried the whole show for me. And also Kim Yo Han, whose character at first lacked any emotion but gradually joined So Ju Yeon in being overly cute!

Giving a show a 9 mostly because It was way too cute, might seem silly. But I stand fully behind this and hope to see more of So Ju Yeon's cuteness in the future.