Notes:
13.06.21: At last! I've made it!
I hope that you all are doing okay. A late update because I've been dealing with a lot. Work was crazy! And then our cases of Covid started rising again, in addition to the discovery of a new deadlier variant so the country went under a strict lockdown. Soon after, I fell ill and was in a lot of pain for a few days. I have since been seeking medical help but don't worry, I am doing my best to continue eating healthy and taking my vitamins. That has helped a lot with my recovery, although the meds I got from the doctor have made me very drowsy.
Regardless, the story is going on! If you follow me on Twitter, you would see that I've been doing a lot of adjusting in the latter part of the outline. I managed to write nearly 85, 000 words to add to the story drafts in the first 8 weeks that I've been gone! I couldn't concentrate enough to edit a new chapter properly, but I have been making drafts for future scenes so don't worry, I have not abandoned this.
ANYWAYS, ah… Poor Tanjirou. Come my friends, ride the tide of angst with me as we delve more into the 'psychological' genre of this tale…
IMPORTANT: Hope you don't mind that the action in this chapter is more focused on showing the effects of Muzan's mind fuckery on Tanjirou🙏. My main motivation for writing a chapter such as this is that I see showing his internal struggle as a critical foundation in explaining Tanjirou's actions in the future and preparing you all to witness his pending descent into a ruination that (possibly) cripples his hopes of escaping …🐺🐥
Chapter Summary:
Tanjirou attempts to fight his change, but the more he fights, the tighter he becomes entangled in Muzan's web of psychological trickery...
He manages to think of a way to escape in spite of his condition, but... does he have the mental strength to carry out an escape at this stage of being ruined?
Content Dictionary
Agoraphobia: is a fear of being in situations where escape might be difficult or that help wouldn't be available if things go wrong (Ref. NHS). In this case, Tanjirou is slowly developing a fear for leaving the mansion because Muzan has both told and demonstrated to him that he will be severely punished if he goes against his wishes. He wants to run away, but he is worried that his plan would fail and he would not only be unable to escape, but that he will bring misfortune to his loved ones.
xxx: End of a section
[[Sound]]
[[PANT]] Gasping for breath / Heavy breathing
[[HUFF]] Laboured breathing
[[BADUM]] An emotional beating of the heart
[[BA-DUM]] Heart beating erratically / character is overwhelmed
.
Name: "Memory of a conversation / thought."
"Heh.": A laugh
NOTE: There will be a lot of ellipses (these -...) in between the words of Tanjirou's sentences as he is dazed and not able to think clearly. His thoughts are patchy and unfocused and his memory of recent events have not fully returned as yet. Basically, as he is partially mind-broken, he is stuck between caving in to become Muzan's loyal servant, and desperately fighting to hold on to his sanity.
🔞WARNING!🔞: I'm not even gonna lie. This isn't dubious consent. It is flat out extreme non-consensual—just read the tags. Added to that, my style of writing is very graphic and depicts the physical / emotional reactions of those involved. As such, most of the Re-educating a Slayer Arc contains a very graphic telling of sexual punishment, imprisonment and forced domination/submission. If you know that you will be triggered by this, please take care of your mental health by not reading any further.
Disclaimer: I understand that BDSM and all its subdivisions are for 18+ participants only. By writing this story I am neither condoning the participation of underage members, nor glorifying abuse or lack of consent in the Community. This is far farrrrrrrrrrrrrrr (x infinity) from a healthy D/s (BDSM) relationship. This is fiction and written for fun.
**For a definition of the terms Master, and submissive little used in this chapter, see the notes of Chapter 21.
🔞APPLICABLE WARNING TAGS!🔞:
•Do You Like Your Porn With Plot?, •Angst, •Depression / Grief •Mind Break •Kamado Tanjirou is a Mess, •How much is too much? •Sexual Exhaustion,•Kamado Tanjirou Needs a Hug...BUT NOT FROM THOSE TENTACLES...! •Agoraphobia elements, •Mind games, •Extreme stress, •Anxiety, •Paranoia, •Some mental instability
DON'T SAY I HAVEN'T WARNED YOU!
CHAPTER BONUS? YES! Chapter memes and END NOTE IMAGE available. SEE END NOTES
The sound of lightning pierces my ears
My heart wavers
- Gurenge by LISA lyrics (Demon Slayer: Kimetsu no Yaiba OP)
Chapter 34: Re-educating a Slayer XV: Self Doubt
.•.
.•. ❤ .•.
.•. ❤ .•.
.•. ❤ .•.
I have become a repulsive creature...
xxx
AH…
I...FAILED TO PROTECT everyone...
.
Tanjirou: "While I was sleeping comfortably in another house, everyone was killed...such a cruel thing. They probably hurt. They probably suffered. I am sorry I wasn't able to save you [Manga Chapter 1]."
.
I thought that…I had suffered enough for that but… My punishment for failing to avenge them...is this body... It is...to be this repulsive creature...to be broken...
I am...broken...
Broken and—
"..." Tanjirou froze as his depressing thoughts struck a memory in his numb brain.
.
Muzan: "I'm not ending this until all of you is broken and ready to be remade into the perfect demon servant, my little boy[Ref. Chapter 31]~"
.
I'm…'broken and ready'…?
Uhh...?
Had Muzan said those words to him while he had been phased out?
I think...
I think I...
Bits and pieces of the details lost from his recent memory were returning to him and as his Master's words played in his head, Tanjirou was getting closer and closer to a realization...
.
"...not ending this ..."
.
"...all of you...broken and ready...perfect demon servant..."
.
A realization that was leading him to see that Muzan had given him a way to escape the rest of the torture he had planned for him.
Perfect…
Perfection… is Muzan's...goal…
I … can I be...perfect…?
"Perfect...demon servant..." Tanjirou repeated to himself under his breath, and like a gift from the gods, a sudden thought occurred to his broken mind, Muzan...would mark me if he thinks that I'm perfect—if I'm...fully...broken...
[[BADUM]]
His heart increased its tempo as he made this connection and the glimmer of fading light within his soul sparked anew.
[[BADUM]]
Before...when I became a demon...he took off my bonds [Chapter 9] and freed me...from being chained to the bed...so if I do as he wants… and accept his Mark now, he would...let me out of this prison...
Ah.
With his situation being as hopeless as it was, what if the only way out was to do what he had not considered before?
What if the solution to his distress was to submit to Muzan's vice tonight and hope that he retained his human consciousness after receiving the Mark?
He…will think…that I want…to work for him…
Can this…happen…?
An escape...
I can...escape...
It was possible. Muzan had said it himself; he was special.
.
Muzan: "Even though...your mind is weakened… Your ability to override my commands and manipulate that body so eloquently is seamless[Ref. Chapter 19]."
.
And…
Nezuko-chan... was a full demon…
She was able to fight his influence…
If she can...do it...I can do it too…
I...still have...my human brain, so...I should try…
There is...hope.
Carrying out a plot to fool the Demon King might work not only because of his ability to conquer his Master's commands, but because Muzan would not be anticipating that he was capable of feigning submission in the condition he was in.
His apparent weakness would work for him.
And combined with the fact that Muzan was desperate to make him his loyal servant, he would not suspect that Tanjirou would accept his Mark with the aim of plotting an ulterior motive of escape.
Ah...Muzan thinks that...I'm too distressed...to plan anything...
He would drop his guard...and leave an opening for escape.
By...letting him mark me, this will buy me enough time to plot a way out...
I...can escape...and if I can return to the Slayer Headquarters...
.
Tanjirou: "The drug to revert Muzan's influence exists and as long as it exists, there is hope [Ref. Chapter 3]."
.
The reiteration of his earlier thoughts reminded him of the strong possibility that he did not have to remain living as a demon; a curse.
All he had to do was escape and seize the opportunity to be returned to who he was.
But...
[[BADUM]]
[[BADUM]]
[[BADUM]]
Suddenly, as his hope to defy Muzan increased, that hope caved as though a hidden switch had been flipped inside his mind.
Ah. Tanjirou visibly deflated further, his thoughts starting to cycle through from bold ambition to utter despair .
[[BADUM]]
But...What if...things fail...?
Would his plot work so well for him to get far enough away from his Master to receive the antidote and return to being human?
This…
And naturally, there was one other major problem that Tanjirou was reminded of—his previous doubts about the efficacy of Tamayo's antidote for demonization.
I...don't know of anything that's happening out there…
Muzan is...focused on me…
So that could mean that Nezuko-chan was cured…
It could mean… There is… no longer a sun-immune… demon for him to...chase after…
But… it could also mean that Kiriya-sama has hidden her well…
I don't know...I know nothing…
The drug...everything we know of it...was hurriedly prepared with...few trials...
.
Tanjirou: What if I escape and Tamayo's antidote doesn't work for me? ? [Ref. Chapter 12]"
.
The question he had been asking himself that evening pushed its way into his mind, accompanied by his other suffocating doubts.
.
Tanjirou: "How can I hope to change my fate? Will it ever change? [Ref. Chapter 12]"
.
What if Muzan had referred to him as 'special' not only because of his hybrid nature and innate strength, but because he knew that as a full demon he would be able to beat the antidote?
My demon body is...really strong…
And Muzan...he conquered the drug's effects…
It's possible that…I can…conquer the effects too…
Regaining my former self...can't...be as easy...as running away from this hell...
Yes. Muzan was not one to make mistakes so blatantly.
It was obvious that his Master had carefully plotted his ruination from his kidnapping to every detail of his thirty-one days of torture.
.
Muzan: "I'm not ending this until all of you is broken and ready to be remade into the perfect demon servant, my little boy[Ref. Chapter 31]~"
.
[[BADUM]]
[[BADUM]]
[[BADUM]]
[[BADUM]]
[[BADUM]]
His heart started to race as the same memory that had brought him hope, now made him cautious.
Muzan...we planned to trap him with...Tamayo-san's drug but...
Even with that...unexpected development…he escaped...and beat it...
Muzan…
Isn't a fool…
What if...he's...setting me up...with this as a test..?
Could he be…
[[BADUM]]
[[BADUM]]
Tanjirou's thoughts trailed off into the despair clouding his mind.
What if his Master was baiting him, hoping to lead him to think that accepting his Mark was the only way out when it was not?
Ah…
What if it was a trap to make him submit to being marked?
Muzan's ruination plot was probably a two-layered scheme with the end result being that he marks him and the means of getting to that point being that he either gives in out of despair or is forcibly made to submit through mind break.
No…
All this time, Tanjirou had thought that the mind break through sexual torture was Muzan's main method for that night, but the more he went over his situation, the more the possible intricate details of Muzan's plan unfolded before him.
And this of course depressed him further.
If I get overconfident... and carry out another escape plan... only for it to end like my last attempt[Ref. Chapter 18 + 19]...
What would he do to me...?
.
Muzan: "You're not allowed to get away, Kamado Tanjirou,"
"It's clear that someone needs to teach you some manners[Ref. Chapter 19]."
.
Muzan would not take his repeated insubordination lightly.
What would he punish me with…if I try to escape…again...?
Will he...
Suddenly, the thought of the Demon King turning him on his friends and punishing him by forcing him to slaughter his loved ones with his own two hands made him tremble.
[[BADUM]]
[[BADUM]]
[[BADUM]]
[[BADUM]]
[[BADUM]]
With these frightening thoughts in his head, Tanjirou not only doubted himself, but feared greatly for what Muzan would do to his precious people.
He had already established that Muzan was insane and unpredictable. And he had seen how loyal his demon body was to its Master. If he submitted and allowed Muzan to corrupt him with his Mark, there was no guarantee that his special constitution to resist Muzan would really preserve his mental state not only as a demon, but as a Marked Demon . Would he still be a hybrid, or would he become a full and obedient demon when marked?
Added to that, as a Marked Demon, wouldn't Muzan have greater control over his body and an ability to see his every move and thoughts?
All it would take was for his plan to fail and for Muzan to get angry enough to do something drastic.
Then it would be all over.
[[BADUM]]
[[BADUM]]
.
Muzan: "You're getting overconfident with the fact that you can wrestle control from me.[Ref. Chapter 19]"
[[BADUM]]
.
Yes, Tanjirou was sure of it now. Carrying out such a risky plan would not just be a temporary loss, but he would lose forever if he chose to become a Marked Demon.
.
Muzan: "You're obviously shaking in fear…"
"Yet you're so determined to anger me even more[Ref. Chapter 20]."
.
More and more, with the memory of Muzan's confidence in the vast control he had over him, Tanjirou's self doubt grew to the point that he was quickly nearing the point of losing complete confidence in himself.
He was becoming less willing to take risks.
[[BADUM]]
[[BADUM]]
I can't do it...
I can't...trick him...
[[BADUM]]
I can't put everyone at risk...like that...
Tanjirou was not seeing that through Muzan's mind games, he had lost what was most special to him — his unpredictable edge and his ability to take huge risks to gain a victory.
He instead saw his decision to forego attempting to fool Muzan as not wanting to risk the safety of those close to him.
Muzan was winning. This was more proof that the demon's tortures and mind games were working.
I'm...a Slayer...I must fight this….
I want...to...fight…
I'm a Slayer...I'm a—
[[BADUM]]
.
Muzan: "…you're a submissive now. MY submissive and you naturally crave to obey me —your Master. You are a tool.~[Chapter 9]"
Muzan: "…your body belongs to me and your submission is something that should be given naturally to your Master.[ Ref. Chapter 20] "
.
Tanjirou was at the stage where the mere thought of overriding his Master's might had Muzan's brainwashing circling through his mind and he was beginning to authentically see Muzan as having all the power in their relationship.
I...can...fight….but…
Can I… fight him…?
He was beginning to lose faith in his own strength.
[[BA-DUM]]
I am...too weak...
Muzan had manipulated him and broken his mind to such a low point that even when Tanjirou had figured out a way to escape, he was hampering himself from carrying it out successfully.
I'm too...weak to...do ...anything against him…
.
Muzan: "I am your superior... [Ref. Chapter 20] "
Muzan: "...you should know that any strength you have, your King would have one million times that… [Chapter 28] "
.
[[BADUM]]
That recollection, and the growing feeling of self-doubt and loss of confidence had his mind trapped between submission and defiance.
That's right...even though I was able to control this body...so perfectly...
Master was still able to subdue me...
Master will see through my plans...
[[BADUM]]
Tanjirou gasped as his panic mounted and his detached thoughts brought on by his dire situation continued to plague him.
.
Muzan: "I will need to train a disrespectful pet like you to be more obedient[Ref. Chapter 20]."
.
More...obedient...
He...will think I need more training...if I try to escape...
No...
He will make me kill everyone I love as punishment for my disobedience...!
As Tanjirou's thoughts became more paranoid, he was unable to see that he should have had more faith in himself and the fact that retaining his human mind through sheer will alone had made him a special demon. Feigning loyalty and receiving Muzan's Mark now was not a perfect plan, but it would have left him with a strong possibility of preserving his mental state. It would have granted him the ability to be better able to fight the Demon King's Mark and its influence later on.
Continuing to fight the impossible fate he was given and receiving the Demon Mark when he was mind-broken would only give Muzan more control over him.
Weak...but...can't give in…
Hate ...Muzan…
[[BADUM]]
It was almost pitiful how Tanjirou's hate for Muzan and not just his stubbornness, was the root of his downfall.
It was now snuffing out every minor attempt at insubordination and providing the perfect foundation for this stage of his mind-break to keep him submissive — thus working for Muzan instead of against him.
And it blinded Tanjirou to the point that his refusal to give up in any way, shape or form was a smokescreen for the mind-break that was taking place below the surface.
Poor Tanjirou; holding on, thinking that he was resisting Muzan, when his mind was becoming exactly what Muzan wanted—reduced to an unrecognizable mess— while all his hatred did for him was to retain his stubborn drive to not yield.
This was as close to the perfect state of mind-break that Muzan wanted to get Tanjirou into. He was completing his well set up plot to leash his human mind so that if his mind-break failed, Tanjirou would never be able to escape from an internal prison of constant self doubt.
And his plot was so perfectly constructed that Tanjirou did not even think to compare his current escape plot to his last attempt [Chapter 18 + 19].
Sure, the last had failed, but when he had carried it out, he had done so with his usual reckless drive to succeed regardless of the cost. He had pushed past the threat of death to challenge Muzan in an all or nothing bid for freedom.
He had remembered his loved ones and used the mantras he had learned through his training with Gyōmei to increase his focus [Manga Chapter 135]. He had endured in spite of the odds.
However, where was that drive now…?
Now, he was so affected by the intensity of Muzan's torture that he was overly cautious, lacking self confidence, had forgotten about using his mantras, and had lost hope instead of gained strength when thinking of his family.
He was like a captured animal that had been thrown into an unexpected and inescapable situation with inexorable odds. An animal that no matter how many times it tried to escape and endure, it was constantly beaten down, shown how weak it was and how much more strength its captor possessed.
Weak.
Broken.
Humiliated.
In such a situation, nature dictated that the animal would stubbornly keep doing whatever was necessary to escape until over time, its pride and fortitude would slowly be chipped away enough to tame it for its captor to do as he pleased.
This was the direction Muzan had been steering Tanjirou in for the past thirty-one days. He was taming him with a strict and unwavering attitude—just as one would tame a wild and uncontrollable animal. And now the fate that Tanjirou was unknowingly accepting—to continue trying to recover, to not give in, and to not be broken—thinking that he was resisting, was set in stone.
Muzan was succeeding while Tanjirou was stuck in a cycle of failure.
Tanjirou had reached a hopeless stage of useless struggling to think that he was achieving something when it was obvious that he was losing.
When it was obvious that he would be completely mind-broken and tamed before the night was over.
Master…. I can't make Master angry… Tanjirou thought in the midst of his descent while Muzan's planted brainwashing played in his head,
.
Muzan: "Master hates disobedience."
"Master is angry."
"Master would hurt you even more if you object too much."
"You are not strong enough to fight."
"Fighting will achieve nothing."
.
[[HUFF]]
[[HUFF]]
Tanjirou's cool, agitated breaths huffed in the quiet room as his body quaked with the slightest tremble.
The nausea in his stomach rose with his panic.
Can't leave… Can't run….
Stay in room…
Running is bad… If I'm bad…he'll hurt them…my friends won't be safe…
.
Muzan: "Remember, Tanjirou, this is your fault. I am punishing you because you're a bad little boy. Don't make me do this again. I don't want to hurt you [Ref.: Memory from an earlier torture session when he was still human]."
.
[[HUFF]]
[[HUFF]]
I ...need to behave…
[[BA-DUM]]
Otherwise...Muzan...will make this torture…hurt more…
.
Muzan: "Fighting will achieve nothing."
.
Hoping is...worthless...
[[BADUM]]
"Heh~~" Muzan's hearts beat out a simultaneous rhapsody of joy as Tanjirou's dulled gaze rose to meet his and he looked into the nearly soulless eyes of the blushing, kneeling and bound boy before him.
[[BADUM]]
I love that expression…~
Mmmm…~
.
Muzan: "How unfair. Why can't I ever get what I want without it being so difficult to acquire? [Ref. Chapter 32] "
.
It was hard to get it, but what I want will be mine soon…~
[[BADUM]]
All of Muzan's previous thoughts about the difficulty of mind-breaking Tanjirou were now replaced with a sense of great achievement. It may have taken a substantial amount of effort, but the effort was worth it. Tanjirou, the boy he wanted to serve him, was finally going to become the perfect demon servant he desired.
This…~
[[BADUM]]
This is what it feels like to succeed, he thought smugly. Perfect...you are my perfect little one~
[[BADUM]]
And while Muzan was thrilled with the thought of having all of Tanjirou, Tanjirou's heart was crumbling.
[[BADUM]]
[[BADUM]]
Ah… this…
Tanjirou's broken heart ached terribly as it thudded in his chest.
[[BADUM]]
This is what it feels like...to be utterly lost, he thought sadly as he watched the smile that stretched his Master's lips, This is a feeling I know too well…
Looking into the eyes of his family's killer made him recall the unfairness of their sudden death, and the sight of their dead bodies lying in the cold earth with shovels of dirt falling on their faces as he had buried them.
He and Nezuko had been unable to grieve for them properly and they had had to leave their family behind, in the graves he had dug, in preference for setting out on a long journey to get revenge for them.
And what kind of revenge was this? Weakly glaring at his most hated enemy? Seeing how disgusting and lewd his body had become and how grossly incapable he was of getting justice for his loved ones?
This...
So...unfair...
Staring down Muzan did not cause his anger to burn as hot as it once did, but caused him to feel nothing but humiliation for what he had become.
.
Muzan: 'Poor Tanji-kun~ Did you think that you were succeeding in your little plot to fool me…? [Ref. Chapter 9]'
.
Yes.
That would be the result of any attempt to escape his captor.
Failure….
. Recapture….
. Severe...punishment.
Muzan is...watching…
Tanjirou shuddered under the animalistic glare of his Master's astute attention on him..
Always watching... and studying me…
Always waiting for him to slip up so that he could hurt and discipline him.
Ah.
And with the thick shadows cast by the overhead lamp playing over the Demon King's face, lending a sinister quality to his Master's satisfied expression, Tanjirou felt so distraught that a wave of dizziness gripped him.
[[BADUM]]
Now, keeping his eyes open and himself upright was a difficult task. Bit by bit the pervasive feeling of being inside a nightmare he could never hope to escape was multiplying.
It was as though his brain was failing him.
Revenge...
A lone, straggling tear trailed down his cheek.
Revenge...? ?
Atonement...?
I couldn't...protect my family, and I can't even...avenge them...
I am an unfilial son...and a terrible brother…
I…have fallen…
So far…I—
His breath hitched as another tear rolled from his watery eyes.
I...am a repulsive creature now...what can I hope for...?
And with that, with his mind reaching its highest point of panic and its lowest point of despair, his head bowed and the world became coated in darkness.
xxx
Regardless what you scream and cry about
You will be immersed in the sadness of this cloudy world
Can't go back spring of love
The memories that are lost frozen into a snowstorm
They wont go back, not a single thing
- Kimetsu no Yaiba 'from the edge' Fiction Junction / LISA
Search for brownsugarprod1 to view My group's TWITTER !
Chapter Bonus?: Please see my twitter for the link to the:
- Chapter memes
- End Note image
.
To access bonuses: go to the link in the header of the group Twitter and then click the tab that says "ART (Muzan x Tanjirou art and End Notes for Ruination). It's the third tab after you click the link. All the uploads are there.
Next Chapter Title: Re-educating a Slayer XVI: Is It Over…?
Next Chapter Teaser: Tanjirou has long discarded his own needs.
First, it was to help his family as much as he was physically able, and later it was to become a selfless servant of morality and slay the evil demons that constantly threatened humanity's safety.
However, those days of standing strong for what was right feel so far behind him. Here he was, fallen from a Slayer to a severely mentally stressed demon that was kneeling before his Master to accept punishment.
He is unable to do anything to oppose Muzan and in spite of the stifling depression that's cloaking him, he struggles desperately to hold on to the faint bit of his sanity that's left.
But holding on continues to be a difficult task, as Tanjirou tries to keep himself grounded in the midst of a ruination that seems to have no end…
( ͡° ͜ʖ ͡°)
NEXT UPDATE: Schedule is depending on how burdened I am with work and also how well I feel. I will try to update whenever I can, so maybe 1x in every calendar month. If I can manage, 2x a month.
Stay safe and healthy guys :*
.
END NOTES SECTION- Where the Author discusses (makes fun of) their characters' actions from that chapter
Author: This End Note Section is brought to you by Tanjirou trying his hardest in spite of the odds...
(NOTE...I don't try to be funny in these notes. These are actual, genuine things that go through my mind while I'm editing. Tbh I'm full of sh*t):
.
Hmm.
-1 "...so if I accept his Mark now, he would...let me out of this prison..."
Author: Surely...you didn't think it would be that easy. First, try overcoming the brainwashing that's making you doubt your self, then try again...
-2 ' This is what it feels like to be utterly lost, Tanjirou thought sadly as he watched the smile that stretched his Master's lips, This is a feeling I know too well...'
Author: Oh my heart...
SPECIAL THANKS ❤😊
Thank you! I appreciate that you would leave me your little messages so thanks to the following for commenting:
Compasssilk (Thank you soooooooooooooooooooooooo much for your amazing message to me! I took your advice and posted it on Wattpad! I had been opposed to posting it there before but your motivation sold me haha. I was extra careful though and put up only up to chapter 19 as I didn't want to risk getting the story taken down due to the excessive censorship rules there.
Thanks for the encouragement! Because of you I was able to introduce this to people who would not have found this otherwise!
I hope that you can continue reading this!)
- Acjmonkey (Hi! How are you? Hahaha Muzan totally needs to chill here and as you can see, he has left Tanjirou for a little while, but ah...he's still standing there glaring at him so the poor boy is having a panic attack. Poor Tanjirou...
As for you, I hope you have better internet connection now!
And it's good to slow down with writing. There will be good and bad days! Don't fight the process and let it flow naturally!
Burning him alive does sound like a good option, and since the flames Tori makes are so hot, I don't see Muzan being able to get out of this. He was burned by that Pillar (Sanemi?) and regenerated, but with the heat you've described...it would be as fast as his regeneration is and stop him from recovering.
Stomach acid is good too, but with that, you will have to consider how well he'd be doused in the acid and how potent it is to kill his cells as fast as possible. Because of course...super fast regen. Even if she chews him up, I bet Muzan will somehow find a way out. But it can always be a good secondary ability.
So yeah, flames will be my top choice!
Good luck with your writing!)
- Naninondesuka (Sorry, but I'm laughing so sooooo much at your "F you tentacle daddy" X'D! Like...why is that a whole mood? While writing this I was so darn conflicted! On one side I'd be loving Muzan and what he's doing, but on the other, I'd be on Tanjirou's side and wanting to punch him LOL and oddly, it's so much fun. Thank you for your encouragement! Makes me so happy whenever someone tells me that they like the way I write because that helps me to to feel less stressed about whether I'm doing this story justice!)
-Ysabelxox (Sameeee mood right here my friend! I'm literally hurting while writing this but a friend of mine turned me into a lover of angst and now I love it when my favorite characters hurt even though I'm hurting so bad too. It's something about the psychological stress and exploring how a character deals with the trauma of being thrown into an unexpected situation that is so damn exciting! But I like to mix in a little happiness and pleasure too so it isn't all pain for them haha ^^; Oh and thank you for reading this and still being interested! Yessss all abroad the Ruination train!)
-AlterEgo (Omg I do know the Twitter user and the story you're speaking of! And it's a good thing too because some days their account randomly goes on private :0 The best part about that comic you mentioned is that some kind souls have been translating it so I don't have to struggle to read the hiragana parts with my EXTREMELY poor Japanese lmao. And don't worry about telling me when I knew about it already - we shippers gotta look out for one another and I'm so happy that you would tell me this *heart eyes* That's what I call making sure that a fellow shipper has the good food!)
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Thanks everyone for reading, commenting and being so motivating! I give you all many virtual hugs and wish for you to stay safe and healthy :)