1 - 20 of 343 Works in Kibutsuji Muzan Being an Asshole
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Found Family by Anonymous
Fandoms: 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia (Anime & Manga), 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime), 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Manga)
10 Oct 2025
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"This world is cruel." That's what Izuku Midoriya learned when his mother was killed by a demon.
"This world is still so beautiful." That's what the Kamado family taught him when they took him in.
Only for him to learn cruelty again.
A Demon Slayer X My Hero Academia crossover
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What is a Lord to a King by RADARMYBRAT3
Fandoms: 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime), 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Manga), 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia (Anime & Manga)
10 Oct 2025
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Summary
All For One calls himself the Demon Lord.
He survived All Might years ago and now in Kamino Ward he escapes once again.
But his escape lands him and his puppets into an Alternate dimensional fortress filled with monsters.
And a Demon King named Muzan Kibutsuji.
- Language:
- English
- Words:
- 3,617
- Chapters:
- 1/1
- Kudos:
- 7
- Hits:
- 69
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Derailed Fates by Firezaster
Fandoms: 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime), 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Manga)
10 Oct 2025
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Summary
After "Blades of Fate," Tanjiko and her friends are assigned to investigate the mysterious disappearances on the Mugen Train.
Series
- Part 2 of Forged Fates
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Infinity Castle: Resonance by LeeTheMetalSonic
Fandoms: 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime), 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Manga)
09 Oct 2025
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The events of the Infinity Castle Arc if Tengen Uzui never retired from the position of Hashira. He retained his eye and hand during the battle with Gyutaro.
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Between Your Fangs by SoggyAquaLoaf
Fandoms: 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime), 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Manga)
09 Oct 2025
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Summary
"I don't want eternity, Akaza." Rengoku murmured, his eyes painted in a deep melancholy. Akaza's heart throbbed painfully; Kyojuro just didn't understand. "The best thing about possessing a finite life is the infinite emotion present in every moment, knowing that you have to cherish it before your short time on this earth ends." Rengoku clutched Akaza's hand tenderly; even a simple action like this possessed such a profound sensation of sadness, Akaza thought ruefully, as if he knew that this bond of theirs could only end in tragedy.
"Eternity is the only way I can have you." Akaza choked out.
"You have me now."
"But not for eternity."
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Why You Should Never Trust Men Who Look Too Good To Be True (Because Most Likely, They Are) by ShanelleT9
Fandoms: 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime), 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Manga), 呪術廻戦 | Jujutsu Kaisen (Manga), 呪術廻戦 | Jujutsu Kaisen (Anime)
07 Oct 2025
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Summary
Landing in another dimension was not what she had in mind when she was looking for a way out. On the bright side, at least she was far away from Kenjaku's grasp. Now on to figuring out her current situation. Starting with the kinda nice, harmless? stranger before her.
"Who are you?" She asked, voice reflecting her confusion over her current situation.
The man smiled, gentle and soothing. "Kibutsuji Muzan. It's nice to meet you."
Series
- Part 2 of Gojo Kiyomi
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The phenomenon by Maori_Tomioka
Fandoms: 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime), 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Manga), Demon - Fandom
07 Oct 2025
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You're pulled into the world of demons and slayers by an unexpected phenomenon. There, you meet comrades, face deadly missions, and discover a connection to a certain Hashira. But why you? Why do you see memories you’ve never lived? And why does your breathing style defy all expectations? And why do you look like certain someone?
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Muzan X reader by Im_all_over_the_place
Fandoms: 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime)
06 Oct 2025
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Muzan turns You (YN) into a demon and you have to adopt to it, but then you somehow appeased him?? What will happen next? Only time will tell!
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Back To Old Us by Lastsummer_21
Fandoms: 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime), 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Manga)
06 Oct 2025
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Summary
Everything was normal starting with family, friends, coworkers, and life in general.
Demons? Fairytales to scare kids or at least that’s what I believed they were, I never thought I would be fighting one, I never thought I would even meet one but what choice do I have when the enemy whom I thought I defeated more than 100 years ago survived? After all the life’s that were taken in the Infinity Castle good lord even before then.
But I won’t let that happen again, because this time we will do it better, we won’t make the same mistakes, and we sure as hell ain’t leaving any one behind, we started together, we will stay together, and we will win together.
Series
- Part 1 of The Mistakes We Made
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Paper Cranes by ADHDMeds
Fandoms: 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime), 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Manga)
05 Oct 2025
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𝘙𝘦𝘥 𝘣𝘭𝘰𝘰𝘥 𝘤𝘦𝘭𝘭𝘴 𝘢𝘯𝘥 𝘸𝘩𝘪𝘵𝘦 𝘤𝘦𝘭𝘭𝘴 𝘢𝘭𝘪𝘬𝘦 𝘲𝘶𝘢𝘳𝘳𝘦𝘭𝘦𝘥 𝘸𝘪𝘵𝘩 𝘵𝘩𝘦 𝘥𝘦𝘮𝘰𝘯 𝘣𝘭𝘰𝘰𝘥 𝘪𝘯 𝘢𝘵𝘵𝘦𝘮𝘱𝘵 𝘵𝘰 𝘤𝘶𝘳𝘣 𝘪𝘵 𝘢 𝘸𝘢𝘺𝘴 𝘭𝘦𝘯𝘨𝘵𝘩 𝘢𝘸𝘢𝘺 𝘧𝘳𝘰𝘮 𝘩𝘦𝘳 𝘤𝘰𝘶𝘳𝘴𝘪𝘯𝘨 𝘣𝘭𝘰𝘰𝘥𝘴𝘵𝘳𝘦𝘢𝘮. 𝘏𝘦𝘳 𝘣𝘭𝘰𝘰𝘥 𝘤𝘦𝘭𝘭𝘴 𝘮𝘢𝘯𝘢𝘨𝘦𝘥 𝘵𝘰 𝘢𝘥𝘦𝘲𝘶𝘢𝘵𝘦𝘭𝘺 𝘳𝘦𝘴𝘵𝘳𝘢𝘪𝘯 𝘵𝘩𝘦 𝘥𝘦𝘮𝘰𝘯 𝘤𝘦𝘭𝘭𝘴 𝘧𝘳𝘰𝘮 𝘶𝘯𝘥𝘦𝘳𝘨𝘰𝘪𝘯𝘨 𝘮𝘪𝘵𝘰𝘴𝘪𝘴. 𝘋𝘦𝘮𝘰𝘯𝘴 𝘦𝘷𝘰𝘭𝘷𝘦, 𝘥𝘦𝘷𝘦𝘭𝘰𝘱𝘪𝘯𝘨 𝘢𝘯𝘥 𝘢𝘭𝘵𝘦𝘳 𝘵𝘩𝘦𝘪𝘳 𝘸𝘢𝘺𝘴.
𝘚𝘰 𝘵𝘩𝘦 𝘢𝘭𝘵𝘦𝘳𝘯𝘢𝘵𝘪𝘷𝘦 𝘤𝘰𝘶𝘳𝘴𝘦 𝘰𝘧 𝘢𝘤𝘵𝘪𝘰𝘯? 𝘈𝘮𝘢𝘭𝘨𝘢𝘮𝘢𝘵𝘦 𝘸𝘪𝘵𝘩 𝘩𝘦𝘳 𝘣𝘭𝘰𝘰𝘥 𝘤𝘦𝘭𝘭𝘴. 𝘓𝘪𝘬𝘦 𝘱𝘶𝘥𝘥𝘭𝘦𝘴 𝘤𝘰𝘢𝘭𝘦𝘴𝘤𝘪𝘯𝘨 𝘪𝘯𝘵𝘰 𝘢 𝘤𝘶𝘳𝘳𝘦𝘯𝘵 𝘵𝘩𝘦 𝘤𝘦𝘭𝘭𝘴 𝘮𝘪𝘯𝘨𝘭𝘦𝘥 𝘵𝘰𝘨𝘦𝘵𝘩𝘦𝘳. 𝘐𝘯𝘵𝘰 𝘴𝘰𝘮𝘦𝘵𝘩𝘪𝘯𝘨 𝘥𝘦𝘣𝘢𝘳𝘳𝘪𝘯𝘨, 𝘶𝘯𝘴𝘢𝘯𝘤𝘵𝘪𝘰𝘯𝘦𝘥.
𝘕𝘰𝘵 𝘩𝘶𝘮𝘢𝘯, 𝘯𝘰𝘳 𝘮𝘰𝘯𝘴𝘵𝘦𝘳.
𝘕𝘰𝘵 𝘦𝘹𝘢𝘤𝘵𝘭𝘺 𝘢𝘭𝘪𝘷𝘦, 𝘺𝘦𝘵 𝘯𝘰𝘵 𝘥𝘦𝘢𝘥.Mariruri my little cornball oc undergoes some fairly traumatic events now both of her parents are dead and she's possibly on deathrow too!! yippee
- Language:
- English
- Words:
- 943
- Chapters:
- 1/?
- Kudos:
- 1
- Hits:
- 3
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perfection by levertons
Fandoms: 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime), 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Manga)
05 Oct 2025
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Summary
You are a down-on-your-luck theater actress working to pay off your father’s debt to a yakuza boss. For as long as you can remember, your life has never been your own. The only peace you can seem to find is in your little sister, but your relationship with her is jeopardized when someone new enters your life.
During one of your performances, you catch the eye of Muzan Kibutsuji, a rich megalomaniac trying to run for office. His fascination with you spirals into a deadly obsession, threatening all that you hold dear.
Muzan promises to make all of your problems disappear – for a price.
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Tanjiro and the land of the mad(A kny wonderland au) by NightlyLamprocapnus
Fandoms: 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime), 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Manga)
04 Oct 2025
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Tanjiro had always had a normal life, his siblings and parents and a uncle. However will he be curious and follow the white rabbit with the clock and vest or will he heed his uncle's warnings and lullabies to never follow one and fall in the rabbit hole?
A kny wonderland AU that may or may not be continued eventually. ReWritten prologue to fit better to the story!
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blood for blue lilies by cupidshotme (maraschinogirl)
Fandoms: 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime), 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Manga)
03 Oct 2025
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If there was a word for ‘being in too deep’, you would be the definition of it. You wrote the meaning of it in your own blood, sweat, and tears.
And soon, you’d be signing a contract with the devil using someone else’s blood.
𑁍𑁍𑁍
Muzan Kibutsuji's descent into 'Hell' reimagined with an adoring caretaker by his side.
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Bring me to life by s0me0ne_l0st
Fandoms: 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime), 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Manga)
02 Oct 2025
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Summary
reverse isekai story *.•
In different worlds, Y/N and Muzan both found comfort in each other respectively reading the book series where the other was depicted.
What happens when one of them takes a step left and gets sent to Y/N's crappy one bedroom apartment ?
__________________DISCLAIMER: This fanfic will have a Y/N with a sightly more precise personality than the last one I wrote; I apologize if you can't relate to her as well as you'd wish to.
There will be mentions of gore, depression, SH, ED, and probably other not-so happy stuff. Read at your own riskNone of the characters from Kimetsu no Yaiba belong to me, all rights go to their author !!
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Marionette by astragazer
Fandoms: 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime), 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Manga)
02 Oct 2025
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***
❝𝙅𝙪𝙨𝙩 𝙨𝙩𝙖𝙮 𝙖𝙨 𝙢𝙮 𝙥𝙧𝙚𝙩𝙩𝙮 𝙡𝙞𝙩𝙩𝙡𝙚 𝙢𝙖𝙧𝙞𝙤𝙣𝙚𝙩𝙩𝙚 𝙛𝙤𝙧𝙚𝙫𝙚𝙧.❞or
You became Douma's plaything for years until the day he decided to turn you into a demon, so you can stay as his pretty little marionette forever
***(Cross-posted on wattpad under the same name)
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Tsuki no Uta wa Oni o Yobu (The Moon’s Song Summons the Demon) (Douma x reader) by KPrincess3697
Fandoms: 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime), 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Manga)
01 Oct 2025
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Summary
The world breaks beneath a blood moon, fracturing time.
Her defiance calls Akaza, drawn by the fire of her spirit. But it is Douma who becomes the shadow at her side—smiling too sweetly, watching too closely. To him, she is temptation itself: a fragile flame he cannot decide whether to devour or keep, to worship or to consume.
She was never meant to survive. Yet survival entangles her fate with his.
This is a story of devotion twisted into obsession, of violence entangled with beauty—
and of a song that tempts even a monster beneath the snow. -
What if Kokushibo trained Tanjiro by RADARMYBRAT3
Fandoms: 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime), 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Manga)
01 Oct 2025
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What if Kokushibo broke from Muzan's control and vowed revenge for his brother.
His way of doing it? Training a young boy who looks just like his brother.
Series
- Part 2 of Demon Slayer
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Bowser in the Taisho Era by FireWriter2025
Fandoms: Super Mario Bros. (Video Games), 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime)
01 Oct 2025
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What happens when the Koopa King of the Mushroom Kingdom discovers the world of Demon Slayer? Who will he side with, and how will he impact the final battle? The answer? A lot.
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Slayer Games by KazenoKokyu
Fandoms: 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime), 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Manga)
01 Oct 2025
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The world has gone to crap. Every year, two people from 12 districts aged between 12-25 are forced to compete in a sickening game where 24 are sent to fight to the death, and one comes home.
It is unstaged.
It is real.
This is what they have to live with.
These are the Slayer Games.
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Summary
Okay so starting off, there will be multiple POV's, there is no main couple whatsoever, now there will probably be times where on chapter or multiple is focused on one but trust me there is no main couple. There's no main characters. This is a multi-fic where everyone will have a role, a comment, words to say etc etc. It's going to start off in the first chapter which will practically be a rough draft and how this story is going to move forward.