The story is so cute and sweet! I loved the art style (for both the background and character sprites). I would definitely love to see a continuation of this universe/content, and I wish we could know more about other characters' family/personal lives like we could with Xin :3 Anyway, great game :)
Ooh also, error report- Harriet's name should be ??? before Nell gets "officially" introduced to her in class, but it shows as Harriet when Nell talks to her in the halls. (There was one scene like this, if you need a screenshot I'll try to take one)