It is AD 2312 - four years after the battle between Celestial Being and the UN military. 
Having survived the fight for the moment, they were looking at the future of a unified world... however behind the scenes the independent Earth Federation forces, A-Laws (Arrows) were keeping the peace via brutal repression. 
With this false peace continuing the distortions of before, it is clear their job is not yet complete. The world requires a force for change - Double 0 Gundam!

This manga based on the second season of Gundam 00 is illustrated by Auto Taguchi and follows on from his manga based on the first season.

Four years have passed since the final battle between Celestial Being and the UN Forces, but Setsuna and the Meisters face a new adversary - the A-Laws! The battle to unite humanity continues! 
(Source: Amazon) 
This manga based on the second season is illustrated by Kouzou Oomori and follows on from her manga based on the first series. 
Bandai Entertainment holds the English license.

Four years have passed since the final battle between Celestial Being and the UN Forces. Humanity, having established the Earth Sphere Federation, forms an independent security preservation force, A-Laws, separate from the formal Federation army to further unify nations and the will of mankind. But the reality was the inhumane oppression of misuse of powers, doctrines, and ideologies in the name of unity. 
Saji Crossroad has followed the path to becoming a space engineer to keep his promise to Louise Halevy, who in turn was compelled to become involved in Federation government reform and joined A-Laws as a mobile suit pilot during the four-year gap. 
Meanwhile, Setsuna F. Seiei, having survived the climactic battle four years ago, witnessed a change in the world due to the actions of Celestial Being. With the defeat of Alejandro Corner, he dreamed of a peaceful world without conflict; but before his own eyes was the reality of the continuing strain on peace, the oppression caused by A-Laws. He decides once more to fight with Gundam, the power with the potential to change the world. 
(Source: Wikipedia)

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