I really liked this manga, it has a really good plot, it has the type of thing that I like. I loved the way in which the reader is able to connect all the parts of the puzzle that is the plot. It's main focus is on the main character, Mizuki, but it has other side stories that go along and that let you have a breath from the pretty deep story.
What I found most amusing about it was how it was written, because the author changes the narrators through out the work making it so that the audience can see the story from almost every point of view. I found it really easy to recognize which of the characters was talking in each moment, I think that it's really amazing, because in many other mangas i have read I really don't get what's going on. Though, i'm not sure if it's just me, because I read some other comments in which they said that they didn't get what was going on, but I understood it completely and even was able to guess what was going to happen (that didn't took my excitement to wonder what was going to happen).
Talking about something else, I have to say that the art is pretty good, well, I guess that depends on each taste, but I have always loved Ai Yazawa's drawings, I think they go with the atmosphere of her mangas in general.
I cried a lot while reading this manga, not a surprise because I almost always cry with shoujo and josei, but it is remarkable that this manga got to me really early in the story. Most of the time i feel touched when i have been reading a long time, but in this case Yazawa manages to connect you to the main character, Mizuki, much earlier.
To end this I would like to say the ending is good and goes with the plot, but a would have liked to see a bit further in the future to know what happened to the characters after everything was over, though that gives the reader the possibility to imagine what the most probable ending is.
P.S: sorry if i wrote "I" too many times. 😛