A Collection of Big Brother Tomura AUs
Series Metadata
Listing Series
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The Brains, the Brawn, and the Wallet by katydid for Gentrychild
Fandoms: 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia
02 Dec 2021
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Summary
After All for One was maimed during his fateful fight with All Might, Kurogiri accidentally gave the master’s wife Inko the address to the villains’ secret hospital. Izuku, convinced that his father was injured by the same villain who hospitalized All Might, launches an investigation with Tomura and Gigantomachia as his shanghaied sidekicks.
Series
- Part 1 of A Collection of Big Brother Tomura AUs
- Part 36 of Dad for One Short Fiction
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Someone Got Tomura a Therapist but It’s Izuku and He’s Seven by katydid for AntiqueOwl
Fandoms: 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia
09 Dec 2021
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Summary
Subject: Izuku Midoriya
Quirk: Emotional Duct Tape
Description: Subject fixes behavioral issues stemming from past trauma by crying over the victim.
When All for One kidnapped Izuku so that his quirk could keep Tomura’s issues under control, he grossly underestimated the power of therapy and an angry seven-year-old would-be hero.
Series
- Part 2 of A Collection of Big Brother Tomura AUs
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Worn Down by Wind and Water by katydid
Fandoms: 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia
24 Mar 2022
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Summary
Izuku pitied Tomura when All for One first possessed his body. Now Tomura pities Izuku for not even realizing what holding One for All has done to him.
Series
- Part 3 of A Collection of Big Brother Tomura AUs
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Corgizuku by katydid for Goofy_Boss, Gfan97
Fandoms: 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia
27 Feb 2024
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Summary
Izuku gets hit by a quirk that turns him into a green corgi puppy. Tomura adopts him on sight.
Series
- Part 4 of A Collection of Big Brother Tomura AUs
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Game Over by katydid for etrevil
Fandoms: 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia
04 Apr 2022
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Summary
The alternate universe where Tenko Shimura is All for One’s blood son doesn’t turn out much better for him. At least Tenko realizes at a younger age that All for One is a monster, and flees to protect his younger siblings Izuku and Eri.
Series
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Smile Through the Tears by katydid for Triestella
Fandoms: 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia
14 Apr 2022
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Summary
All Midoriyas are heavy criers, including those who married into the family or were adopted. It might be a quirk, a mutation, or a curse. Tomura is about to experience the waterfall tears, because his sensei is married to Inko Midoriya and the father of one annoying but adorable brat, Izuku Midoriya.
Series
- Part 6 of A Collection of Big Brother Tomura AUs
- Part 54 of Dad for One Short Fiction
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The Shigaraki Family Talent Agency by katydid
Fandoms: 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia
26 Jul 2022
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Summary
Izuku Midoriya: lead singer for the Dekusquad. Tomura Shigaraki: guitarist for the League of Villains. Unknown to the media, these two rival idols are also adopted brothers.
Series
- Part 67 of Dad for One Short Fiction
- Part 7 of A Collection of Big Brother Tomura AUs
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A Murder of Brothers by katydid for DawnHero
Fandoms: 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia
23 Aug 2022
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Summary
Izuku gets hit by a quirk that causes the first person he lays eyes on to believe that he’s their little brother. Unfortunately, he looks at Tomura, Dabi, and All for One.
Series
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Schrödinger’s Todoroki by katydid for BlueRose0justBlueRose
Fandoms: 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia
20 Sep 2022
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Summary
At a young age, Shouto Todoroki finds out that his supposedly dead older brother became a villain. In high school, he investigates the League of Villains. His keen conspiracy theorist skills realize that Touya Todoroki must be the white-haired villain related to a hero…Tomura Shigaraki!
Dabi spontaneously combusts from sheer rage.
Series
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The Great Eraserhead Goggles Heist by katydid for acanfullofspiders
Fandoms: 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia
16 Nov 2022
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Summary
Elementary school Izuku and Tomura plot crimes.
Series
- Part 10 of A Collection of Big Brother Tomura AUs
- Part 78 of Dad for One Short Fiction
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The Big Brother Support Forum by katydid for MelancholysSunshine
Fandoms: 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia (Anime & Manga)
17 Mar 2023
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Summary
Tomura goes online looking for help on how to be a good big brother to his newly discovered cousin Izuku.
After his injury and forced retirement, Tensei has way too much free time on his hands and decides to help other big brothers with their sibling relationships.
Series
- Part 11 of A Collection of Big Brother Tomura AUs
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Everything Returns to Dust by katydid for Tunafishprincess2 (tunafishprincess)
Fandoms: 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia (Anime & Manga)
06 Apr 2023
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Summary
Tomura had lost one sibling (two siblings?) Since obtaining the All for One quirk, his memories were a jumble. But he didn’t want to lose his little brother Izuku. No matter what he had to do.
Izuku is just trying to survive an overpowered madman under the delusion they’re brothers.
Series
- Part 12 of A Collection of Big Brother Tomura AUs
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The Big Brother Contest by katydid for DawnHero, EmmaIveli
Fandoms: 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia (Anime & Manga)
20 Mar 2024
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Summary
Tomura and Dabi get into a competition over who is the best big brother—and they kidnap Izuku and Shouto to judge them. May the least awful brother win!
Series
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How to Ruin Your Father’s Wedding by katydid for Gentrychild
Fandoms: 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia (Anime & Manga)
27 Aug 2023
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Summary
Endeavor marries All for One to break his always second best curse. Both sides of the family flip out. No, seriously, that’s the plot of the fic.
Series
- Part 102 of Dad for One Short Fiction
- Part 14 of A Collection of Big Brother Tomura AUs
- Part 15 of A Collection of Big Brother Dabi AUs (or, Dabi Demands His Own Big Brother Series Since I Gave One to Tomura)
- Part 2 of Flaming Potato
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The League of Vigilantes by katydid for freakyanimegal
Fandoms: 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia (Anime & Manga)
06 Nov 2023
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Summary
An amnesiac Izuku joins the League of Villains. To their frustration, he keeps being nice and helping people. Now everyone thinks they’re an organization of vigilantes!
Series
- Part 105 of Dad for One Short Fiction
- Part 15 of A Collection of Big Brother Tomura AUs
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A Hand Offered One Last Time by katydid for Gentrychild
Fandoms: 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia (Anime & Manga)
17 Nov 2023
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Summary
While locked inside a vault, Izuku tries to reason with Tomura.
Series
- Part 16 of A Collection of Big Brother Tomura AUs
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The Boy Who Cried Boogeyman by katydid for Gentrychild, Gfan97
Fandoms: 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia (Anime & Manga)
09 Feb 2024
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Summary
Izuku spun a story about the boogeyman to protect himself from bullies. It was never supposed to be real.
Series
- Part 3 of The Boy Who Cried Wolf
- Part 17 of A Collection of Big Brother Tomura AUs
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The Mortification of Having Brothers by katydid
Fandoms: 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia (Anime & Manga)
07 Jun 2024
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Summary
Tenko lives an ordinary life after his adoption into the Midoriya family. Until he develops overblown suspicions about his little brother’s love life and arrives at U.S.J. to give all of Class 1-A an epic shovel talk.
Series
- Part 18 of A Collection of Big Brother Tomura AUs
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Parasite by katydid
Fandoms: 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia (Anime & Manga)
22 Aug 2024
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Summary
All for One and One for All are alien parasites. Cousins Izuku and Tenko get drawn into the family feud against their wills.
Series
- Part 19 of A Collection of Big Brother Tomura AUs
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Worst Nightmare by katydid for Shad0whuntress
Fandoms: 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia (Anime & Manga)
14 Sep 2024
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Summary
Dr. Garaki conducts an experiment to swap Tomura and All for One’s bodies. The device will lock onto anyone sharing All for One’s DNA. But that won’t be a problem, because All for One has no living relatives…right?
Series
- Part 20 of A Collection of Big Brother Tomura AUs
- Part 139 of Dad for One Short Fiction