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 8

Arc 8 of 66 in A Certain Magical Index

Arc 8: Level Upper

In the story: 16–24 Jul

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.

Seen by the end of Railgun.

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

Rumors spread of a way to improve an esper's abilities without the usual training. Mikoto and her friends follow the resulting incidents through Academy City, where the promise of stronger powers comes with consequences for the people using it.

Where it sits

Level Upper in A Certain Magical Index
FormatVolumesUnitsLanguage
Manga — A Certain Scientific RailgunVol 1, 2, 3Chapters 1–17Japanese
Manga — A Certain Scientific RailgunVol 1, 2, 3Chapters 1–17English
Anime — A Certain Scientific RailgunRailgunSeason 1, episodes 1–12—

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