Where the anime ends, and where the books carry onAnime, manga, light novels and web novels, lined up by story arc

Arc Almanac

21 Oct 2026Draft. Not yet checked against the books.

All series / A Certain Magical Index / Arc 14

Arc 14 of 66 in A Certain Magical Index

Arc 14: Silent Party

In the story: 24 Aug – 2 Sep

Arc name chosen by Arc Almanac, because the books don’t name it.

I’ve watched through

Earlier in story order than the end of Index I.

Railgun stops before this arc.

Earlier in story order than the end of Index II.

Earlier in story order than the end of The Miracle of Endymion.

Seen by the end of Railgun S.

Earlier in story order than the end of Index III.

Earlier in story order than the end of Accelerator.

Seen by the end of Railgun T.

Item (episodes 1–2; airing) stops before this arc.

What happens

Mikoto and her friends meet Febrie, a young girl caught up in a research conspiracy. Protecting her leads them into conflict with STUDY and pushes Mikoto to rely on the friends around her.

Where it sits

Silent Party in A Certain Magical Index
FormatVolumesUnitsLanguage
Manga — A Certain Scientific Railgun—CutJapanese
Manga — A Certain Scientific Railgun—CutEnglish
Anime — A Certain Scientific RailgunRailgun SSeason 2, episodes 18–24—

Draft. Not yet checked against the books. Report a wrong mapping.