1 - 20 of 417 Works in Quirk Side Effects (My Hero Academia)
Navigation
Listing Works
-
Planet Earth is blue and there's nothing I can do by iriam_noel
Fandoms: 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia (Anime & Manga)
14 Feb 2026
Tags
Summary
Bakugo Katsuki and Midoriya Izuku were living the height of their lives when it all shattered.
Katsuki has lived as a ghost since then, raising their daughter in a house built on silent resignation and the memory of an inseparable force that the world has long since forgotten. He had finally made up his mind that Izuku Midoriya was a file that would never be closed—another ghost he'd carry to his own grave.
Izuku has been living as a heartbeat in the dark, a clinical component in a project that stripped him of his humanity; he's been counting the seconds in a void, protecting the only thing he had left until the day the walls finally broke, but he only traded one void for another, and the sky looks very different today.
-
Foreign Worlds, Lost Together. by Xant
Fandoms: Soul Eater (Anime & Manga), 少女終末旅行 | Shoujo Shuumatsu Ryokou | Girls' Last Tour (Anime), 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia (Anime & Manga), Death Note (Anime & Manga), Made in Abyss (Anime), Shingeki no Kyojin | Attack on Titan, 陰の実力者になりたくて！ | The Eminence in Shadow (Anime)
13 Feb 2026
Tags
Summary
They woke up in a world that shouldn't exist — one with no night, no stars, and no way home.
Drawn from distant worlds by something unknown, they must survive in a jungle of rusting machines, broken architecture, and creatures that should not be. With no clear enemy and no explanation, they move forward together — scavenging, mapping, fighting, and watching each other just as carefully as they watch the shadows.
Something brought them here. And it’s still watching. -
our resident ice pack (or furnace) [PODFIC] by my_lost_and_found_podfics for Argentina
Fandoms: 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia
12 Feb 2026
Tags
Summary
Shouto’s quirk has always been a wonder. A perfect split between two parents—an immaculate combination of hot and cold.
In which:
-Class 1-A uses Shouto as a water bottle cooler.
-Shouto uses his left side to soothe Katsuki's hands after he overuses his quirk.
-Shouto serves as Hitoshi's ice pack when he gets a headache.Podfic of our resident ice pack (or furnace) by Argentina.
- Language:
- English
- Words:
- 36
- Chapters:
- 1/1
- Kudos:
- 5
- Hits:
- 81
-
The After Effects Of Mind Control by Idek_guys0034
Fandoms: 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia (Anime & Manga)
09 Feb 2026
Tags
Summary
Short one shot of a headcanon I've had for a long time about Shinsou's quirk causing migraines and seizures because to me it makes sense.
Series
- Part 1 of MHA Quirk Drawbacks
-
We All Remain, Such Fragile Broken Things by Glass_O_Lemonade
Fandoms: 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia (Anime & Manga)
08 Feb 2026
Tags
Summary
The Context: Aizawa fosters Shinsou. Midnight knows what is and isn't appropriate in a school setting.
The Conflict: Kaminari's infatuated. Shinsou finds it harder to say no. Everyone's trying to survive to see the next day.
Title from Paramore's Song, "Part II"
-
8 Days by LuvrrRae_MHA
Fandoms: 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia (Anime & Manga)
08 Feb 2026
Tags
Summary
Bakugou sees something bizarre one day, and little did he know it would affect him for the next week...or specifically, the next 8 days. Aizawa strives to find the solution, the cure and unravels the backstory on what's going on. While Izuku is getting closer with Bakugou, wondering what'll happen next, wondering what's happening. Classmates argue on who Bakugou really is, or was.
(OR) Bakugou says something's he can't un unsay, sees things he can't unsee, does things can't undo. When will he realize he's the not doing anything, but someone else, who is undoing him.
I'm really trying not to spoil anything. It's kind of a mystery fic. Sorry, it's vague. But, trust me it's super good, to me at least, hope to you too!! Planning on a chapter every weekend, Saturday/Sunday.
-
Always Ours by Becca12345, Flightsoffiction
Fandoms: Teenage Mutant Ninja Turtles (TV 2003), 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia (Anime & Manga)
07 Feb 2026
Tags
Summary
A rewrite of: Of Portals and Desperation: A very confused Splinter finds himself and his sons dragged into the BNHA world, and everyone seems to think they've always been there. In fact, somehow, Splinter is the teacher for 1-A, and always has been. And it just so happens that this change occurs just as the USJ attack is happening.
-
Despondency (But Not All Hope Is Lost) by 12vibing21
Fandoms: 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia (Anime & Manga)
01 Feb 2026
Tags
Summary
“Eraserhead,” Juniper addresses, standing back from the unconscious criminal and dusting off her costume of any dirt. “Fancy seeing you here.”
“I could say the same thing about you,” he huffs, crossing his arms as he leans on the alley wall behind him. “I heard you got a nasty blow the last time you were out, are you sure you should be out right now?”
“I’m fine.” Juniper dismisses, avoiding Shouta’s face in favour of staring down her burner phone she pulled out of her pocket. “Just a small scratch.”
Or: Inko Midoriya is a woman of many secrets; Shota Aizawa is dragged along for the ride.
Do not re-upload this fic anywhere else. Only posted under this account on AO3.
Series
- Part 1 of Despondency
-
mellow petals by hatake079
Fandoms: 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia (Anime & Manga)
01 Feb 2026
Tags
Summary
the flowers were paper, living eternally, whilst the memories withered away.
-
Change by Sincerely_tx
Fandoms: 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia (Anime & Manga)
26 Jan 2026
Tags
Summary
Does a quirk define a person-
Or does a person define their quirk?Not all quirks are born equal.
Some are praised
Some are feared
While some are quietly condemned from the moment they appear.In a society which neatly categorizes power into 'Hero' and 'Villain', there is no room for anything in between.
No room for quirks that look wrong, or mercy for children born with them.But does one's power decide their morality?
Or did society create the very same monsters that it claims to fear?Alicia learns very early and quickly, some abilities come with expectations-
Others with sentences already written.Was her dream of being a hero doomed from the start?
Written off the moment her quirk appeared?In a society that assigns futures as easily as it assigns labels.
She's given only 2 options:
Embrace the role of a villain,
or fade into obscurity.But what happens when she refuses both?
When she strives to make a change?
-
Carnival by ForeverNightlights24_7
Fandoms: 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia (Anime & Manga)
11 Jan 2026
Tags
Summary
Izuku's quirk lets him bend and twist reality into that of a circus act. He can even rope his allies into it, which he does to rescue his mentor's best friend from the attack on the USJ. And maybe have a little bit of fun.
This fic is highly inspired by the song Carnival by John Michael Howell, which is also featured in this fic directly.
Series
- Part 6 of Another USJ Incident
-
Painfully aware of your place by Anonymous
Fandoms: 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia (Anime & Manga)
09 Jan 2026
Tags
Summary
Kinta's quirk was troublesome.
Like his mother, his quirk was an emitter type. He could liberate a chemical compound from his body in the form of gas and affect the people around him. Mustard gas, a very potent but dangerous chemical that could provoke blisters, temporary blindness and damage the lungs. It seemed that his father's quirk, one that would allow him to come up with chemical formulas in the spot, had doomed him to be a walking bomb. Not even Kinta was immune to his quirk, visiting the hospital several times along his first decade of life due to chemical burns caused when accidentally hurt himself with his own quirk.
He had to go into quirk suppressants since very young, becoming practically quirkless for several years. He could blame his mother, but no one expected that an intelligence quirk would morph into this way. At most he should have either become a brilliant researcher or another walking sleep gas machine, the different quirk types very rarely combined this way. A very dangerous quirk, practically a rogue chemical weapon, a birth defect.
He was an embarrassment.
---
A take on the Mustard and Midnight are related headcanon.
-
Trust me by Willofhounds
Fandoms: 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia
04 Jan 2026
Tags
Summary
Four vigilantes protect the streets of Musutafu. Clover and Mirror act as the tech experts. Sword and Shield acts as the fighters. Hero week looked forward to by most is dreaded by these four. Secrets to keep or to reveal. They must be careful in who they place their trust.
-
Why haven't we done this before? by Sobaepice
Fandoms: 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia (Anime & Manga)
03 Jan 2026
Tags
Summary
Katsuki finds himself locked out of his apartment, exhausted and freezing. Todoroki offers shelter and warmth.
-
The Boy that Mirrors the Past by Anonymous
Fandoms: 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia (Anime & Manga)
02 Jan 2026
Tags
Summary
“My quirk!” The man laughed as he motioned to the child, “‘Tss called reproduction…As long as I have two people's DNA touching me I can reproduce a baby or child with the donors' DNA.”
“You created a kid using our DNA…” Hawks spoke with wide eyes.
OR
Dabi and Hawks get hit with a reproduction quirk while recruiting. A six year old kid appears who looks eerily like them.
-
No Way! (I have a soul mate?) by StrayCatRunning
Fandoms: 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia (Anime & Manga)
02 Jan 2026
Tags
Summary
Being quirkless meant Izuku didn't have a soulmate, but in reality almost everyone had a soulmate, so, did he actually have one or not?
Or:
Nothing so disorderly and foolish as a soulmate connection would ever happen to him, he was certain of it, so what the hell is going on!
Or:
At roughly eleven years of age everyone gains a soulmate, (even if they have to wait years for them to show up), and sometime in that same year the YOUNGER of the pair spends 24 hours inside the mind of the elder.
From that point on they alternate years, spending those same twenty four hours inside the mind of their soulmate.
Unless they both reject the bond.
Or:
Why are they not rejecting the bond?
-
Sheltered by XaphiiniaQuill
Fandoms: 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia (Anime & Manga)
01 Jan 2026
Tags
Summary
“You're amazing,” Shoto murmured into his hair. Deku huffed a little laugh.
“It's just sex,” Deku said quietly. “Not me.”
“Mmm,” Shoto said because he didn't think it was true. “Well, I really like doing sex with you.”
“It's ‘having’ sex,” Deku said and Shoto could hear the smile in his voice even though he couldn't see his face. “I- I actually like it with you too.”
That made Shoto sit up to look at Deku's face.
“Do you not normally?” Shoto asked. Deku looked away and shrugged slightly. “I guess it is a job for you.”
“I suppose,” Deku said, biting his lip slightly. Shoto leaned over so he could reach up with his clean hand and run his finger along Deku's lip. Deku blushed and looked up at him. “Don't you like your job? Being a hero?”
“No,” Shoto said simply. Deku blinked at him in surprise.
“But you're so good at it! I always wanted to be a hero as a kid. You make so many people happy and make them feel safe!” Deku said in surprise. Shoto shrugged lightly, mimicking Deku's movement from earlier.
“I just do it, I guess,” Shoto said. “Never really had a choice.”
“Oh,” Deku said, giving Shoto a concerned sort of look. “Um, me too, I guess.”
-
Aizawa's Misfits by Kumas_Kira
Fandoms: 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia (Anime & Manga)
27 Dec 2025
Tags
Summary
This year's incoming class was already looking to be a handful. He supposed that is what happens when you run close to a thousand barely old enough teenagers through one of the hardest selection processes in the world.
“So my main man, what kind of listeners are we getting this year?”
“Take a look yourself Mic” Combat boots clicked through the empty hallways of the prestigious school as the duo made their way towards the teachers lounge.
Whistling low, the energetic blonde was flipping through the pages. “What a lot my guy!”
"Of all the first year classes we’ve seen, this one looks to be the most versatile. Explosions, mental, water, electricity, creation, acid creation, hardening, tape, three heteromorphs, and half a dozen more, mix in some unknown power quirk and a dual user of ice and fire and I’d say this is going to be a headache.” Plopping into his old man chair he started to make a mental organizational chart.
･ﾟ✧:･.☽˚｡･ﾟ･ﾟ✧:･.☽˚｡･ﾟ･ﾟ✧:･.☽｡･ﾟ･ﾟ✧
WELCOME BACK MISFITS!
It's finally here! After a very long break the reworked story is here! - This is a labor of love for me and a very selfish piece but I do hope you dear readers enjoy the completely reworked timelines and story.
-
When this night passes (I'm afraid that I'll be left alone) by Emo_Chanel for Forested_Woodlands
Fandoms: 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia (Anime & Manga)
25 Dec 2025
Tags
Summary
Bakugo is fine. Seriously. Until he isn't.
-
Thunder Past by Kastalani
Fandoms: 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia (Anime & Manga)
23 Dec 2025
Tags
Summary
Chargebolt is widely considered the first "true" hero of Quirked society — with a Quirk uncharacteristically strong for the Dawn of Quirks, he showed that the Quirked can do a whole lot of good if given the chance. A shame he sacrificed his life before he could see hero society blossom.
Also known as, Kaminari Denki falls into a dumpster and creates a whole lot of paperwork for Detective Tsukauchi Naomasa, along with causing him quite a few headaches and mental breakdowns. Nobody said finding out that the arguably most important figure in Quirked history is a traumatized teenager would be easy.