Most of the anime is just this but manages to make some appeals. For instance, the anime took some liberties in rewriting events of the manga to serve as a better conclusion. (from what I read the changes were better in the anime)
This show is hit or miss in terms of adaptation as the manga later becomes more battle focused with the occasional mysteries, however what this series offers is surrealist horror & a unique lead. Nuero as a character is quite charming as he is selfish & vicious to the point where a friend of mine described Nuero as a "Shonen Alucard". His presence alone holds the show along with the various monstrous murders that occur.
While it is a detective based show, the focus aren't the mysteries but the horror found within them. Each case brings a creepy tone aided by the much later violent scenes in the series when the antagonist Sai is introduced. One of the downsides of this anime are its supporting cast as they can come off as rather bland. Thankfully the main duo of Yato & Neuro make the show work. Mr.FalconnPunch996 recommended me this series & I personally liked it as it presented a rather disturbing viewpoint of the world. I really wished the anime adapted more if its chapters. The show's repetitive but if you want to see something horror based give this series a try. Just be sure to jump to the manga afterwards.
