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. 
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. (Source: Bilibili, translated) 
Note: Includes seven extra chapters.

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

With the fall of the Hanging Gardens, the mighty Celica returned to the mortal realm. Her triumphant journey, crushing all in her path, began. But is that truly the case? A side story completely different from the game's plot—the overlord Celica has finally arrived after a difficult struggle! (Source: Bilibili, translated)

Constructs, too, were once children of men. This is their story, before committing themselves to a long struggle that may never end.

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