Story: It wasn't very good in my opinion, I was not engaged from beginning to end. Though it was surprising to see two endings which one was bad and the other was a good ending. A bunch of kids trapped in the red night trying to survive by facing the black knights. Didn't like the fight scenes either.
Art: The art was pretty decent it wasn't terrible nor was it very good just very average.
Sound: The only thing that I enjoyed of this anime was the sound with both op and end theme being good as well as the ost.
Character: No character stood out in this anime bunch of generic anime teens with supernatural powers that are not exciting to watch.
Enjoyment: Nothing on this show makes me want to watch it again. It failed to keep entertain throughout the show.
Overall: It was one of those shows that you just happened to just past by and never look back to unless for the music other than that this anime gets a 3/10 for me.