Grey is a manga with post-apocalyptic setting, which follows the life of our protagonist, Grey, after he joins the military. The manga vaguely portrays the current caste system the surviving world is based of, and mostly focuses on the missions of Grey, along with his fellow troopers.

The story of the manga has interesting takes, and the dystopian future which is presented to us is both exciting and terrifying, and the presented world can give us interesting ideas to contemplate about, but sadly the world building is not the main focus of the story, it's the actions that are the main point of interest. The missions of the soldiers are filled with action and detailed gunfights, but the strategic element is always persistent, giving the conflicts more grounded, and serious tone. The mangaka is mostly portraying the militaristic life on this world as a depressive, bleak existance, devoid of meaning and full of grief.

The art is very appealing, but it does matter if you enjoy reading older manga or watching older anime, the artstyle is distinctively from the 80's, but beside this point, it's very crisp and refined. Specific detail was given to the various vehicles and tanks, as well as an expressive character design.

In this manga, the characters are few and some of them have more of an episodic nature. The main character is motivated, as well as most of his reasons for his action are explained, making him entertaining character to follow, but beside that, not much of a character from him or the other supporting cast is displayed or shown, which is a letdown considering the well-crafted concept for the world and it's inhabitants.

Overally, this manga is quite the entertaining read, it is a throwback to the gritty and realistic sci-fi mecha series of the 80's, like Votoms and Southern Cross, but in the same time it has short, simple, nicely excecuted plot as well as entertaining military skirmishes.