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 55

Arc 55 of 66 in A Certain Magical Index

Arc 55: Coronzon

In the story: 12 Dec

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.

Index III stops before this arc.

Accelerator stops before this arc.

Railgun T stops before this arc.

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

What happens

Touma and several allies accompany Aleister to Britain in an effort to counter Coronzon. The search for a weakness in the demon's plans brings them into a struggle involving old magical organizations and the country's own defenders.

Where it sits

Arc 55 in A Certain Magical Index
FormatVolumesUnitsLanguage
Light novel — A Certain Magical Index: New TestamentVol 20, 21, 22Volume 20, prologue – volume 22, epilogueJapanese
Light novel — A Certain Magical Index: New Testament—Volume 20, prologue – volume 22, epilogueEnglish

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