Overall, this deserves it's popular ranking for shoujo manga. The ending was sad, but it showed the realistic ending of what could come from this hopeless love story.
The art is definitely expressive, even if it may be flat and chunky at times. Sometimes it's not fluent, but that's alright, because the plot line makes up for it most of the time. 7/10
The plot line is original, and different from a school life love story. There's an air of fluff to the romance, but there's always humor for the serious stuff, and this one isn't an exclusion. 8/10
The characters remain about the same until the time skip, of which everyone seems more enlightened. Perhaps sometimes Hana is a bit too dimwitted, and Vivi too hotheaded, but all characters have their imperfections. It makes it more realistic. 7/10
It's humorous up to the end, the romance is sweet and sometimes cliche, but earnest. There's lots of jealousy and conflict, and entertainment will supply itself to its max. I recommend this to someone interested in an original love story, as well as someone who wants a little oomph in their reading.