French: Quand Haruhito se réveille, il est dans l’obscurité. Il ne sait plus où il est, qui il est ni d’où il vient. Autour de lui, des hommes et des femmes qu’il ne connaît pas sont dans le même situation. Ils découvrent alors qu’ils se trouvent dans un monde semblable à un jeu vidéo, appelé «Grimgar». Pour survivre dans ce milieu hostile et comprendre ce qui leur arrive, ils vont devoir faire équipe, coopérer et apprendre de nouvelles compétence.
English: Why are we here? Why are we doing this? Before Haruhiro had realized what happened, he was surrounded by darkness. Why was he here? Where was here? Even now, he still didn't know. Those around him were the same as him, no one remembered anything other than their own names. And when they emerged from the darkness, the world that awaited them seemed like something out of a video game. In order to survive, Haruhiro forms a party with the others, learns fighting skills, and as a soldier in the reserve force, takes his first steps into the world of Grimgar. What awaits him there, he doesn't know... This the story of an adventure born from the ashes.