I really like this story. It's true that it isn't the most thrilling or innovative story there is, but it's still a very sweet and heart warming story. And I think it's because it stays true to the theme precisely because it's based on the author's own experience. I really love the chapter where the girls have their confession talk. I wish the mangaka had told us how the two of them grew apart in the end, but that's probably too personal or painful, I guess. I don't like the extra stories as much, but I don't consider them for scoring so the rating for me is still four stars.
It was cute but also really boring. I guess that was because the author took from her own life to write it but...the story was completely bland, like drinking flat, warm soda.