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 58

Arc 58 of 66 in A Certain Magical Index

Arc 58: Christmas Day

In the story: 25 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

A dangerous infection leaves Touma in the hospital after an encounter with Anna Sprengel. Mikoto and Misaki seek a way to save him while the spread of R&C Occultics creates further trouble throughout Academy City.

Where it sits

Christmas Day in A Certain Magical Index
FormatVolumesUnitsLanguage
Light novel — A Certain Magical Index: Genesis TestamentVol 2Prologue–epilogueJapanese

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