Story
Nothing was really unique about the story, it was simple and predictable, not as complex as it appears to be. But I like how the story was told, there was a lot of deep dialogues, you can easily understand how the characters are feelings.
The pacing was random, sometimes fast, and sometimes so slow with lot of unnecessary details. It could end with less chapters in my opinion.

Art
It did well to deliver the story, the expression were realistic. The background and places were drawn well, I was only hoping the character would be drawn more mature after they grow up, but in general I like it.

Character
Nothing is really special about them. I didn't like any character and I don't find them realistic at all. And I didn't relate to a lot decision made by those characters.
-Nanami is like any other shoujo character; She loves, she put all her faith on this love, no matter what happens she doesn't give up or move on, too sensitive and emotional, nothing new.
-Yano is someone who face some sad and critical events, instead of moving on and growing up, He make it a reason to torture himself and drown himself in regret, for too long time than those events deserve. And I don't think he did any wrong to regret and hate himself this much.
-The side characters are also bad, the typical second characters who insist on unrequited love for no reason even when it hurts them.

Enjoyment
I personally enjoy melodramatic stories, but it needs good reason behind all the drama, I don't think this manga deliver this reason for me, so I couldn't relate to the story. If you enjoy sad love stories (even if there is no real reason to make it this sad) then you can like this manga.