A very 'fun' but confused manga. The title and the early chapters set the premise up clearly: it's essentially a manga about a 'monkey's paw' scenario where the main character Count D offers a different character their heart's desire in the form of a pet, while the protagonist Detective Orcot tries to figure out what's going on.

But that's not really consistent: it seems that the mangaka fell in love with the character of Count D and at some point became reluctant to have him play a villainous/punitive role. Eventually, it's not really monkey's paw scenarios, more of a catalyst to the events of the story, typically revealing the traumatic life of the person purchasing the pet and having them either find catharsis or resolution or more rarely punishment for their sins.

I don't think the change is bad, because Count D is likable, and the dynamic between him and the detective is fun and cute - there are a LOT of BL undertones, as you might expect from the art style (but I find this to be on the pleasant side of shoujo art rather than the angular, big handed unpleasant side).

The only 'problem' is viewing the manga as a complete story. The pressure to reveal who/what the heck Count D is means the last volume is a strange departure after the preceding several volumes of innocuous, often quite sweet and beautiful, dramatic supernatural stories. To provide a conclusion, the mangaka reintroduces the conceit of the manga, as if it was consistent: D suddenly expresses his desire to punish humanity's sins in a way that just feels a little jarring based on all the previous events.

Additionally, the relationship with Orcot never seems to go anywhere, despite the side characters constant hints of their being a romance between the two. It would be too much to expect a male/male love in an old series in this genre, but it would have been nice if they'd settled down and become more friendly with each other (although their bickering is still enjoyable).

That being said, I was impressed with how successfully it was concluded - while a change in tone it was well paced, exciting and fun, and I felt a little sad that it was over. The author knows exactly how a morality play should unfold. She isn't overly cruel nor overly lenient - really bad people get their comeuppance, while repentant victims are spared, so you're never left with a bad taste in your mouth.

It's a fun read that is more interest in enjoyable, episodic mysteries and tantalising visuals than setting up rules and being overly consistent, well drawn and easy to sink into.