Based around the video game "Punishing: Gray Raven".

The outbreak of the Punishing virus destroyed almost all the achievements of human civilization as technological development touched forbidden areas. The survivors of the cruel environment still hold hope and are now determined to recover the Earth and rebuild human civilization.<br><br>
The manga records the story of the characters in the game's worldview, who have influenced the course of history with their own powers. In addition, the past of the living weapon against the Punishing virus, the Constructs, are also included in the extra chapters.<br><br>(Source: Bilibili, translated)

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