Completely incomprehensible, this anime begins with six episodes centered on a supposed police investigation that lacks coherence. The next six episodes are 'independent' episodes with no connection to the two detectives' investigation, apart perhaps from the urban legend on which the series is trying to capitalize. And even then, they don't add a single new fact or revelation. The story is disappointing, the characters are bland, and the choice to mix designs that don't go together sometimes spoils certain scenes even more. In short, this anime doesn't even have the merit of being a complete 12-episode series, preferring to add more episodes for no good reason, other than to claim a legitimacy it doesn't have. If the story can't be properly adapted into at least 12 episodes, then it probably doesn't deserve to be adapted at all. This represents an immeasurable waste of time, both for me and certainly for the creators too.
I'd advise everyone against wasting their time watching it!
A word to the wise...