I found myself enjoying the first few episodes immensely, watching with anticipation as the main character struggled with the collision of reality and delusions. I was even tempted to Google the ending to confirm my own suspicions that Rimi was a delusion and it was the main character killing the people (I was clearly wrong). And then things started to fall apart.
I was skeptical of the detectives being included as a parallel story line, and from that point on things that would have worked perfectly fine as the main characters delusions, actually turned out to be due to...science...?
The anime started making less sense, and the main character became more annoying. What started out as a slightly creepy psychological horror/thriller anime turned into a full-blown shonen gotta-catch-them-all harem chuunibyou delusion anime with the last episode being so unmemorable I don't remember it at all despite watching it less than a month ago. I understand the plot is derived or follows closely with the visual novel, and I wonder whether some intern at the animating studio read the script and went 'hey guys I think this makes no sense, should we revisit this?' but was told to fuck off and go get coffee for everyone and the anime was never made intelligible.
The other main characters have very limited introductions and backstories, and you care very little about them. The main character's 'save me save me' attitude gets old very very fast, and the only interesting theme centers around trying to figure out who the hell is the killer (which gets ruined too in a very anti-climactic way).
In conclusion, while I think it began as a strong anime, it fell apart as it tried to add too much to the anime, and really becomes difficult to like or care about the remainder of the story. The only memorable part about the entire anime is 'who's eyes are those?'
