History AgeLift / FanWorks

[[AC: ''Literature/RenZhaFanPaiZiJiuXiTong'']]
* ''Fanfic/SVWishes'', while their ages were ambiguous in canon due to their immortality here Liu Qingge is explicitly ten years younger than Yue Qingyuan.

* This is the main idea behind the ''Webcomic/Persona5AdultConfidantAU'', where all of the [[VideoGame/Persona5 original game]]'s child and teenage characters are now adults and the adult characters are now teenagers, with the once adult confidant characters now acting as the teenage Phantom Thieves.

* ''[[https://www.fanfiction.net/s/13701943/1/BlazBlue-Remnant-Alternative BlazBlue Alternative: Remnant]]'':
** Ragna, Tsubaki, Noel, Makoto, and Jin are all aged down compared to their canonical adult selves due to them being university students here, with the latter four all being about seventeen and the former being eighteen.
** Taokaka in the games was actually younger than Ragna, since she was just a kitten when she met Ragna, who was at the time a teen. Here, she's actually a year older than him.

* Ragna, Tsubaki, Noel, Makoto, and Jin are all aged down in ''[[https://www.fanfiction.net/s/13701943/1/BlazBlue-Remnant-Alternative BlazBlue Alternative: Remnant]]'' compared to their canonical adult selves due to them being university students here, with the latter four all being about seventeen and the former being eighteen.

* A somewhat popular Fan Verse among ''Gravity Falls'' fans is the ''Relativity Falls'' AU, in which the parents and children of Gravity Falls swap ages with Stanford and Stanley Pines now being twelve-year olds off to spend the summer with their Great-Aunt Mabel.

* ''Webcomic/RWBYCherish'':

[[AC: ''WesternAnimation/TheOctonauts'']

[[AC: ''Franchise/{{Disgaea}}'']]
* ''Fanfic/WolfInTheStreetsSardineInTheSheets'': Several characters have their ages tweaked in order to be included among Valvatorez's collection of children that he's taken under his wing.
** Kurtis is the most prominent example, going from twenty-nine years old to seventeen. Jennifer is similarly de-aged in order to keep the two-year age gap between them, becoming a fifteen-year-old.
** Killia also had his age knocked down from being in his early twenties (in demon years) to being a teenager closer in age to Seraphina.

* In the ''Danganronpa Gaiden Series'' by [[https://www.fanfiction.net/u/2423877/WiiFan2009 WiiFan2009]], the cast of ''VisualNovel/DanganronpaV3KillingHarmony'' have undergone this in the years after the events of ''Anime/Danganronpa3TheEndOfHopesPeakHighSchool''. For example, Gonta and Tsumugi are the same age as Kiki Naegi, [[OffcialCouple Makoto and Kyoko's]] daughter. While Kiki and her friends are 6-7 years old, Kaito and Maki (her babysitters) are young adults, and Korekiyo, Himiko, Tenko, Angie, and Kokichi are students at Hope Peak's Academy.

* In the ''Danganronpa Gaiden Series'' by [[https://www.fanfiction.net/u/2423877/WiiFan2009 WiiFan2009]], the cast of ''VisualNovel/DanganronpaV3KillingHarmony'' have undergone this in the years after the events of ''Anime/Danganronpa3TheEndOfHopesPeakHighSchool''. For example, Gonta and Tsumugi are the same age as Kiki Naegi, [[OfficalCouple Makoto and Kyoko's]] daughter. While Kiki and her friends are 6-7 years old, Kaito and Maki (her babysitters) are young adults, and Korekiyo, Himiko, Tenko, Angie, and Kokichi are students at Hope Peak's Academy.

* A somewhat popular Fan Verse among ''Gravity Falls'' fans is the ''Relativity Falls'' AU, in which the parents and children of Gravity Falls swap ages with Stanford and Stanley Pines now being twelve-year olds off to visit their Great-Aunt Mabel.

* A somewhat popular Fan Verse among ''Gravity Falls'' fans is the ''Relativity Falls'' AU, in which the parents and children of Gravity Falls now swap ages and Stanford and Stanley Pines are now twelve-year olds off to visit their Great-Aunt Mabel.

[[AC: ''Franchise/SonicTheHedgehog'']]
* In the oneshot ''Fanfic/FallenAngel'' it's mentioned that Amy is fourteen. In ''Sonic'' canon she's only twelve.

[[AC: ''Franchise/{{Danganronpa}}]]

* ''Fanfic/AmazingFantasy'':
** Peter is 47 in this story, making him a decade older than his comics counterpart (who's in his late 20s/early 30s) and the [[WesternAnimation/SpiderManIntoTheSpiderVerse similarly disheveled Peter B. Parker.]]
** Martin Li is a grown man in the comics, but he's a teenager around Melissa's age [[AlternateUniverse in the universe where she becomes Spider-Woman.]]
* ''[[https://www.fanfiction.net/s/13470641/1/Ara-Ara Ara Ara]]'' goes both ways. U.A. is changed to a university so all the students are three years older. On the other hand, Moe [[RelatedInTheAdaptation Bakugou]] aka Burnin' is a third year student, making her five years younger than canon.

* Shirou in ''[[https://www.fanfiction.net/s/11905736/1/Fate-Gamer-Night-SE Fate: Gamer Night]]'' is five years younger than canon.

* ''Fanfic/TheLastPrayer'' goes both ways. Naruto's peers are all three years older, making them sixteen to seventeen (twenty in Temari's case). On the flip side, Mabui and Samui are twenty instead of twenty-six and Kurenai is twenty-four rather than twenty-eight. Similarly, Mei Terumi is approximately a decade younger than canon, being in her mid-twenties rather than mid-thirties.

* In ''Fanfic/ToTropeOrNotToTrope'': The Maximoff twins are still teenagers rather than in their mid-twenties like they were in ''Film/AvengersAgeOfUltron''.
* In the Franchise/MarvelCinematicUniverse series ''[[https://archiveofourown.org/series/1033283 What If]]'', the Maximoff twins are changed from their mid-twenties to fourteen.