As N Approaches Infinity

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Title: As N Approaches Infinity (ANAI)
Author(s): Corisanna
Date(s): 2015-03-16 -
Length: WIP - 470k + words; 83 chapters
Genre: Crossover
Fandom: Puella Magi Madoka Magica, Bleach
External Links: at FFN, at AO3

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As N Approaches Infinity (ANAI) is a Puella Magi Madoka Magica and Bleach crossover fanfic by Corisanna. It is set in an alternate universe in which Homura Akemi meets the Kurosaki sisters, who have contracted with Kyubey to become magical girls. Homura realizes that the shinigami could serve as important allies in her fight against the Incubators, and the battle is joined.

As of October 2020, it is one of the most popular PMMM fics on AO3 with over 78,000 hits.


Each chapter opens with an algebraic expression representing when it takes place in relationship to the original timeline, X+N, in which Homura first encounters Karin and Yuzu Kurosaki, and is adopted by the Kurosaki family, the denizens of the Urahara shoten--and, more reluctantly, by the wider shinigami hierarchy. As Homura and her allies piece together the Incubators' sinister plan, they realize they must fight across multiple timelines in order to win the war. As ANAI opens in timeline X+N+54, it quickly becomes clear that their task is more challenging than initially anticipated.

Although ANAI occasionally uses characters or elements from the Thousand-Year Blood War, the fic itself is a canon-divergent AU for Bleach, picking up at the end of the Lost Agent arc. It also incorporates characters and storylines from PMMM spin-offs Kazumi Magica and Orika Magica, although knowledge of anything outside the core anime is unnecessary to enjoy the fic.

Hidden runes and distortions in the witches' labyrinths are indicated by selective bolding, inspired by The Magic Catgirl's Like No Other.[1]

Reactions and Reviews


Good lord, this is one of the best crossovers I've ever read. Everyone is so beautifully in character and you have utterly mastered the skill of interweaving the lore of both settings to create something even more epic. [2]

On AO3

AAA I'm screaming.. this is one of the most well-written stories on AO3 and! srs, I frequently patrol the major tags and by far this is in the top 10,, i really really love this crossover! pmmm and bleach all hold a special place in my heart and to see them done so well TOGETHER in a crossover made me weep tears of joy, i couldn't get the smile off my face for hours omg.[3]
This is honestly the best fanfiction I've ever read. Most fanfictions don't get away with being this long, obviously just a long-winded ramble with no clear end in sight, but this fanfiction makes it work. Excited to be reading all 300k words again. [4]

Related Fanworks


  • beside you (in time) by A-chan. AU in which Homura finds herself falling for Hitsugaya across multiple timelines.
  • Smoke and Mirrorless Flowers by M.N. Nepp. An AU "what-if" divergent Chapter 71 of Corisanna's epic crossover "As N Approaches Infinity". Wherein Kyōko Sakura wakes to a familiarly aggravating, if expected, set of faces with a slightly different set of assumptions.
  • The Worst Thing Next to Anarchy (Is The Government) by astrologia.That one universe where everybody in the afterlife decided it was a good idea to integrate battle-ready teen and pre-teen girls into what amounted as a post-mortem military government, and thus, resulted to shuffling the current social norms and power hierarchy, making certain that the ensuing years were filled with many people (and numerous nobles) running around like headless chickens. Post-canon AU.
  • Stitches in Time by StarFlatinum. A loose cannon of a Time Lord, some uncontrollable shinigami, and a bunch of renegade magical girls must combine their time magic, science magic, magic time science, and magic magic to save all those they hold dear. Also the universe, but that's probably not important.


Resources and Fannish Links


  1. ^ Author's Note for Chapter 1
  2. ^ Comment by TheQuiller
  3. ^ Comment by HallowedJack, 27 Apr 2018.
  4. ^ Comment by kept, 15 Jun 2015.