Aahh, I love thisss, the feel of this story is great! Such a light and refreshing writing style, and the concept is reaaalllyyy cool (totally into spirits, ghosts and stuff like that, nya x3)
The pacing is a little off, I think, and you've got some errors with tenses - past tense story, but sometimes you use some present tense words - but still a really cool read cx
I foresee some really emotional stuff, between Maki and the ghost of her sister *o* Gotta keep tabs on this piece x3