Quick version:
If you haven't read this, then read it. It's amazing.

Not lemme elaborate:
I gave it a 10/10 across the board for a reason.
Story?
The development wasn't rushed. It was fun (maybe not always realistic, but hey it's manga), and not super cliched, so that was pretty refreshing for me. It also didn't over romanticize things like- "Oh Abc is SO amazing we'll get married and live a happily ever-after" and be all kawaii kawaii desu desu everywhere. Which was another thing I liked.
Art?
I'll tell you now, it's not your usual fluffy, skinny girls with magical proportions. Especially Momo. Any dance scene was so....*drools*. Very anatomically proportionate. Which was absolutely wonderful. The art also gave me this very Josei-type feeling to me. Not sure if that's universal though, haha.
Character?
The best part of this manga, I think, was that I hated some of the characters or their choices. It's just so wonderful. It makes it more substantial, in my opinion. Again, not always realistic, but you can relate to almost any character- and hey, it's manga, let it be.
Enjoyment?
Well. I was tempted to say 9 so that there was SOMETHING to say hey, it's not a magical manga, okay. But. Well. I guess it is. Since there was no point when I was reading (or rereading, or rerereading) this manga where I rushed or wanted to stop reading. I mean there's one point where I always WANT TO since it makes me feel sad, but I know it'd take away from the manga so I read through anyway. So yeah. It's amazing.
Therefore. 10/10 x 4 = 10/10 Overall too.
So there you have it. READ THIS SHIT. IT'LL MAKE YOU FEEL THE FEELS.