"The World is beautiful..It's a thrilling place"
Wow, I will have the honor to write the first non-preliminary Review ^_^
I only review anime/manga which I find to be a Masterpiece, So Let's start.

TLDR; 7seeds is a hidden gem, which didn't make it's way to the top 50 because of it's incomplete translation (or that's what everybody thinks..I'll discuss how I read it to the end in a separate forum post) 178 story chapters + 4 extra chapters (only 2 are translated that far)

Story 10/10
All of this started when I found this manga recommendation in an article about "best manga that should receive anime adaptation" (I was in the beginning of building my reading list back then), And it should!
I usually don't read the synopsis before the story ,as I want to read the first 1-3 chapters without spoilers, and I advice you to do so to feel it from zero to the peak (It's a matter of taste.)
Anyway, This author is very creative, yet realistic in many aspects.She knows well about culture, science, history, classical music, medicine, forensic medicine, physics, animals and even video games. She also knows how to write good monologues, how to break down a sentence to give maximum feelings of it.
I won't spoil it but aren't those tags enough to get you interested to read ?

Art 8/10
Everyone has a weak point, and it is the art here. In the first chapters the art isn't appealing and it seems below the average, but keep reading then you will find it improving.
The colored covers are amazing, Some of the first pages black and white are well-crafted, The mouth line is cute, Faces (especially the boys) are handsome. One of the things that I found weird is the tears and why They're drawn to like froth? :D

Characters 10/10
The characterization is Top notch,Every character feels so real. This the first manga that make me sad and happy unlike any other one.
Well our MCs are girls and also boys but girls get more screen (ehm..page) time (so the shoujo tag which I suggest to change it to Joesi), Every one with his motives ,skills and back stories.
If you ever to hate a character, There are many many more. From the fool to the intelligent, from the clumsy to the courageous type, from the warm heated to whom with a stony heart and from who have many flaws to whom is nearly perfect.

Enjoyment 10/10
This manga is a masterpiece in its own but I think there's some kind of problem with the scanlation group , It doesn't mean that I'm not grateful for their work, but to find out after reading chapter 96 that the scanlations aren't complete beyond chapter 150+ broke my heart and the upload rate now is one chapter/six month , I spend almost all my rest time for weeks enjoying this alone, I didn't read another manga or watched anime..only this one satisfied me for that period of time.
I went from begging scanlator groups to find alternative solution and I have founded a one (actually very tiring but worth it).

Overall 10/10
This isn't much to be said after this long review . If you're planning to read it, change it to currently reading and enjoy this masterpiece. If not then why not to give it a try?

Hope it was helpful.