((SPOILERS AT THE END))
I feel like most of these reviews were positive because of the anime (which did a great job, by the way! I would suggest watching the anime and waiting for the second season than to read the manga after the first season like I did. It was a mistake.)

Now, the storyline was such a good premise. It had a thing going in the first arc, and it seemed like it was going smoothly. It had good side characters, and while Emma was a good character, she wasn't the best. The story felt very rushed, as each chapter there was a new death or a twist. It was fine and dandy at first, but then it got tiring. The story kept focusing on emma, even when the deaths were of people that were closer with the other side main characters. The deaths were focused on emma's reactions instead, even though it couldve been used as a much better developed arc for one specific other main character.

You could tell the writers ran out of ideas at the end, as they just wanted to use twists and pulled out deaths and a random redemption arc (which was literally put in one chapter? It went by quickly and I could feel nothing for this specific character.)

I wanted to give it a 5, though I dont want to be too harsh as the premise was originally a good idea, but If you want something that's rushed and if your waifu is emma (as you want the entire story focused on her), then this is great for you. Otherwise, Id suggest just waiting for the second season of the anime coming out, instead of reading this manga, as the anime timed the arc MUCH better.