History Fanfic / ACertainInfinitePossibility

* MutuallyExclusiveMagic: [[LightNovel/ACertainMagicalIndex Teikotu Kakine]] is able to join the list of espers capable of wielding magic by using his [[ImaginationBasedSuperpower Dark Matter]] ability to create [[SelfDuplication clones of himself]] out of Dark Matter that has been been given the properties to defy the laws that would cause the fatal hemorrhaging. It's implied it took a few hundred dead clones before he finally got the formula down so that they wouldn't die casting their first spell and further testing before he could actually make the process cost-effective.

** To begin with, canon flow of events stops at Skill-Out Uprising for ''LightNovel/ACertainMagicalIndex'', Daihasei Arc for ''Manga/ACertainScientificRailgun'' and Necromancer Arc for ''Manga/ACertainScientificAccelerator''.

* WhatsHeGotThatIAintGot: Whenever Hamazura gets compared unfavorably to "Kamijou" by ITEM (minus Takitsubo). HilarityEnsues as the former doesn't know ''who'' Kamijou is for about four chapters, until he finally meets him face-to-face and recognizing him as the guy who defeat him during the Skill-Out Uprising Arc. Also, this trope is subverted when the two of them get to know each other more.

''[[https://www.fanfiction.net/s/11260012/1/A-Certain-Infinite-Possibility A Certain Infinite Possibility]]'' by ''[[https://www.fanfiction.net/u/1469288/Darkbetrayer Darkbetrayer]]'' is an AlternateUniverse fic of ''LightNovel/ACertainMagicalIndex'' that takes canon off the rails and weaves a conflict that includes characters from its various spin-offs, and taking them deep into the Magic Side. Touma and his allies are tested like never before, faced with powers beyond their comprehension, and consequences more personal than they are prepared for.

* SharedUniverse: ACIP has two [[NotSafeForWork NSFW-filled]] TimeSkip spin-offs: ''[[https://www.fanfiction.net/s/12566173/1/A-Certain-Orgasmic-Infinity A Certain Orgasmic Infinity]]'' by [[https://www.fanfiction.net/u/4683454/Destati69 Destati69]] and ''[[https://www.fanfiction.net/s/13124190/1/A-Certain-Accelerated-Light A Certain Accelerated Light]]'' by [[https://www.fanfiction.net/u/919751/Maderfole Maderfole]], as well as NSFW-free ''[[https://www.fanfiction.net/s/13231884/1/A-Certain-Regular-Father A Certain Regular Father]]'' by [[https://www.fanfiction.net/u/8528544/D-N-Works D.N.Works]] and prequel ''[[https://www.fanfiction.net/s/13892881/1/A-Certain-After-School-Secret A Certain After School Secret]]'' by [[https://www.fanfiction.net/u/14892872/bitbitbit11 bitbitbit11]]. NSFW fics and prequel are canon B for original work, while SFW one is set in an alternate future.

*** [[spoiler: As of Chapter 122, Touma -- after much convincing from Misaki on the functionality of it all -- is officially in a polyamorous relationship with Mikoto, Misaki, and Ruiko.]]

** Touma with the standard members of his harem but particularly for this fic there, a is a great amount of teasing with Shizuri, Frenda, and Carissa.

*** Saiai has a crush on Accelerator which so far is unreciprocated. However, because Saiai has some of Accelerator's thoughts patterns ingrained into hers -- from her participation the Dark May Project -- she is one the few people who can truly understand him; something Accelerator notes in his interactions with her despite not knowing her history. He also notes that she has [[ShesGotLegs nice legs]].

* [[FreakyFridayFlip Freaky Sunday Flip]]: Because of Eve's chaos magic, Touma and several of his friends end up exchanging viewpoints (not actually their bodies). Touma ends up in Misaki's body, Mikoto in Touma's, Misaki in Mikoto's, Accelerator in Ruiko's and vice-versa and Jason in Kuroko's and vice-versa. HilarityEnsues.

** In chapter 92, Touma barges into the tent shared by Lessar and Leivinia when they're both in a state of severe undress, because [[UpToEleven Imagine Breaker negated the privacy-protection spell]].

** WordOfGod stated that Ritoku Komaba has never been Fremea's caretaker. This role seems to be given to [[HighlyVisibleNinja Hanzou]], with Shiage occasionally helping. Also, in this timeline, Fremea's existence is known to all of ITEM from the beginning.

** Something akin to Battle Royale probably happened on the Dark Side of Academy City, given the lack of MEMBER and BLOCK among active groups by the time ACIP begins. At the very least, [[IJustWantToHaveFriends Rakko]] was severely wounded, as the WordOfGod confirmed that she's still hospitalized, and sniper of SCHOOL has changed.

* {{Foreshadowing}}: When answering a reviewer in chapter 77, WordOfGod states to ''never'' trust a Kihara as a word of advice. After the reveal of Jason's ''other'' surname in the next chapter, and later on in [[spoiler:chapter 120]]; it makes perfect sense.