A one-volume horror story about a group suicide that goes wrong in the strangest way possible.

Story: The story itself is very bizarre and grotesque, based around a group of suicidal adults who find portals to another world filled with a new kind of stone, beautiful and extremely valuable. How far will they go to exploit this new stone? The story questions the depths of human greed and selfishness using this bizarre premise.

Art: Ito's people are easily distinguishable, with expressions that are cliche but understandable. Where the art really shines is in its depictions of the frequently-grotesque portals and the more horrific aspects of this manga. These are lovingly drawn with incredible amounts of detail and are the high points of this manga.

Character: The characters are for the most part selfish and unrelatable besides the protaganist, but they're also well developed. In the end, they become jaded and bitter, apathetic about virtually everything, and their downfall is well plotted.

Enjoyment: The bizarre plot and the wonderful art make this a very enjoyable read, despite being generally a superficial story with mostly flat characters.