Let me say this that I had no other expectations from this because I saw the trailers of the anime before reading this.
This manga is simply legen... DARY! First of all, the art was amazing and played in tune with the mood of the story. When the story went to the past, the art looked very nostalgic. Next, the story, is great as the build-up is fills you with suspense and the characters were mostly great. What I liked in this story was that the women actually played a very important role in this story and weren't exactly damsel in distresses. The suspense was amazing as twists and turns filled every chapter.
The heart of the entire story is Satoru's development and his relationship with Kayo because it gives the reader hope for a better ending and their romance/close friendship was well developed which makes me love it.
I love the characters as Satoru provided the backbone to this story and throughout the series showed development. Kayo, was just amazing and I really felt for her and I hope she will be with Satoru in the end. Airi was amazing and she's a badass just like Satoru's mom. My favourite character is Kenya because he is the perfect sidekick and can become the main character.
Anyways the story was great and I hope that there will be a good ending.