So I haven't seen the anime or read the manga so my review is based solely on the movie.

I was very excited to watch this movie because I really liked all the main actors and it looked beautifully made but in the end I was left with somewhat of a disappointment.

Kekio was dull, Osamu didn't do the "I'm cool and mysterious" thing well enough, Aya and Kento looked great but their story line wasn't polished off well (I was more interested in them than the leads' story) and Yusuke was the saving grace of this movie cuz his acting was the only convincing thing here.

I don't mean to bash the movie, I enjoyed the movie enough to say I don't regret watching it, but I feel like had this movie been made into a drama instead it would have been for the better. I felt like it started off very well but then it plateaued and then kinda dropped near the end storyline-wise. I wasn't convinced with anyone's feelings or actions towards anyone else so to me the last 1/4 of the movie wasn't as heartfelt as it could have been. It felt like for the second half of the movie we got little spurts of everything and so I didn't feel the connections between any of the characters.
The music and the color schemes were beautiful (visually it was very pleasing) and its always nice to see beautiful actors doing their thing on camera but that's not enough to get me to re-watch it unfortunately... unless they do a spin-off with the other characters other than the main ones and turn it into a drama, with extra melodramatics and angst lol.
But like I said I don't regret watching it so I guess I would say "watch it if you've got and 1 3/4 hour to kill and like these actors just don't go in with too high expectations like me:)"