The Art...

Technically, her drawings are all okay except for the faces. Like, hands, arms, clothing, etc. are all decent and technically correct, but they lack detail. It's as if the mangaka really doesn't know how to draw fine, detailed characters and surroundings, and she's hoping that creating this sort of sketchy, messy art will get her a pass since the story is cute. If she had just put some more effort into defining the character's faces, I think it would have been a vast improvement.