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 30

Arc 30 of 66 in A Certain Magical Index

Arc 30: Battle Royale

In the story: 9 Oct

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

I’ve watched through

Index I stops before this arc.

Railgun stops before this arc.

Index II stops before this arc.

The Miracle of Endymion stops before this arc.

Railgun S stops before this arc.

Seen by the end of Index III.

Accelerator stops before this arc.

Earlier in story order than the end of Railgun T.

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

What happens

Academy City's underground organizations turn on one another during a day of competing operations. Accelerator and Hamazura follow different paths through the violence, each trying to protect someone while the city's hidden balance shifts around them.

Where it sits

Arc 30 in A Certain Magical Index
FormatVolumesUnitsLanguage
Light novel — A Certain Magical IndexVol 15Prologue–epilogueJapanese
Light novel — A Certain Magical IndexVol 15Prologue–epilogueEnglish
Manga — A Certain Magical IndexVol 22, 23, 24, 25Chapters 133–149Japanese
Manga — A Certain Magical IndexVol 22, 23, 24, 25Chapters 133–149English
Anime — A Certain Magical IndexIndex IIISeason 3, episodes 4–6—

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