As you can tell by watching at my profile, I'm not really the type of person that does reviews very often.. but after reading this manga, I though that the previous ones about it were pretty strict.
In fact compared to others manga of this period, or in general, it's not one of the worst. If you like thrillers, you may give it a check.

STORY - 7/10 (It might makes some little spoilers, but only about the plot in general)
I start saying that it's not that much original, but it isn't bad.
It has the typical base plot that you could expect by reading a thriller: somebody gets involved with something fishy and need to investigate on it, of course being suspected as well. In the story are mixed also some supernatural elements that are at the base of it. It also goes plenty on the route of an harem, in fact the protagonist has really an aptitude for girls.

ART - 8/10
It's a great art, I kinda like the style, although it's pretty used.

CHARACTER - 7/10
The main characters are five: the "protagonist" (the guy around whome the events happen) and four girls all connected with him. He isn't the classical MC of an harem, but he's pretty smart and not lost in his lust as too many of them nowdays. The girls are different between them, and everyone of them has got a resonable motivation to trust and stay near him.

ENJOYMENT - 7/10
It's good. Nothing special, but I'm happy that I started it, I'll keep follow the story. Obviously hoping for its success, and maybe a good anime adaption in the future.

OVERALL - 8/10
Eight because there're a lot of manga worse than it. And it's done pretty well.
It's only at its first chapters, so I don't know if it's going to become even better or to get bad, but take the review till it's now.