My first impression, the art is cute, as shoujo typical. But no, this manga is not a cute shoujo manga at all. If you are easily irritated or just only want to read "too good to be true" story typical of shoujo, then this manga is not for you. The "real friendship" that mentioned in the summary doesn't meand the "ideal friendship" that's all good and fun, but more about "realistic" story of girls friendship and all of its problems. It's also like questioning, what is "real friend" and who is your "real friend". With everything that happened, can they still be "friends"?
Of course, as shoujo it has the romance side, but it quite little and actually used for developing the friendship story. In its ads, it claims the no. 1 friendship manga and I agree very much. In Japan too, it is the most popular title in Ribon Magazine since its debut for 3 years straight (2014-2016).
It also quite unique of this manga is simple by the appearance, but actually has hidden meanings behind it. Thanks for its beautiful art, reading the expression of Shioka and Yuyu is one more way to enjoy Nanairo Kakumei as a deep manga.
Nanairo Kakumei