Where exactly does A Certain Scientific Accelerator take place in the timeline? I know it'd some time after Accelerator's gunshot wound by the necklace but that's about it.

1 Answer 1


If you are wondering about the episode order:

The broadcasted Accelerator S1 arc happens after Index S1, episode 17 and Railgun S, episode 24.

Which means the Accelerator S1 happens before Index S1, episode 18 and Index S2, episode 1, and Index S1 episodes 19-24, and Index S2, episodes 2-5.

Index S2, episodes 2-5, happens before A Certain Magical and Scientific Ensemble, which happens before the Index S2, episodes 6-7, which happens before the Index Miracle of Endymion movie, which happens before Index S2 episodes 8-24, and Index S3.

  • So Accelerator happens between index 1 episodes 17 and 18? Like all of it? This timeline gets confusing Oct 17, 2019 at 21:48
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    A lot of things happen in parallel. Time is also skipped, so it doesn't go day by day (between arcs).
    – кяαzєя
    Oct 17, 2019 at 21:50
  • Thanks a bunch for this. Can you explain how you narrowed it down? I don't remember anything that gave away the timeline Oct 17, 2019 at 21:52
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    You have to look through the anime chronology. The dates are mentioned in some episodes (and/or can be cross-referenced with the novel) and progress accordingly with the story arc. toarumajutsunoindex.fandom.com/wiki/Anime_Timeline
    – кяαzєя
    Oct 17, 2019 at 21:56

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