Notes:

Hi! We're celebrating my and Tanjirou's belated birthday with a big double update that's got bonuses... 🐺🐥

(P.S.: I'm doing well. At this moment, I'm having the last slice of birthday cake from yesterday xD)

Chapter Summary:

( ͡° ͜ʖ ͡°) As Tanjirou continues to relentlessly refuse Muzan's attempt to re-educate and subdue him, Muzan deals with his reproachful attitude patiently, unfolding the entirety of his plot in a haze of lust that Tanjirou cannot hope to win against. Muzan is determined to create the perfect pet from his most hated enemy, and in his opinion, there is nothing that could stop him from achieving this goal.

Content Dictionary

Thoughts

xxx: End of a section

[[Sound]]

[[PANT]] Heavy breathing

[[HUFF]] Laboured breathing

[[HAH]] A heavy exhale

[[Slap]] A slap

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"Memory of a conversation."

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"Heh.": A laugh

'Telepathic speaking'

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, submissive little and pet used in this chapter, see the notes of Chapter 21.

APPLICABLE WARNING TAGS FOR THIS CHAPTER (new ones are underlined):

• Mind Games
•Author Is Sleep Deprived and Out to Destroy Ukes
•Abuse
•Rape/Non-con Elements
•Sexual Abuse
•Sadism
•Bondage
•Tentacles
•Non-Consensual Groping
•Master/Pet
•I am disgusting
•I Wrote This Instead of Sleeping
•What Have I Done
•Why Did I Write This?
•I Will Go Down With This Ship
•VERY Explicit; detailed and disgusting Sexual Content
•Forced Foreplay
•Non-Consensual Bondage
•Read This Only if You Like Your Porn with Feelings and Angst Because it Will be an Intense Build
•Face Slapping
•Humiliation
•Sexual Torture
•Muzan is a Good Teacher
•Muzan is a Sadist
•Confused Virgin
•Clueless Virgin
•Uncircumcised Penis
•Demon Daddy Muzan
•They Both Get More Than They Anticipated From This
•erotic humiliation
•How much is too much?
•Hentai Combat Muzan
•Tanjirou's Demon Daddy is Very Angry and Very Bitter.
•Tanjirou Gets the Sex Education Not Taught in the Corps..!
•Orgasm Control
•Tongues Don't Go There Sir
•Kamado Tanjirou Needs a Hug...
•Where is the 'Sentient Tongues' tag?

DON'T SAY I HAVEN'T WARNED YOU! I'M A SADOMASOCHISTIC WRITER.

[SEE TWITTER FOR IMAGE THAT COULD NOT GO HERE]

(Don't worry, I was hurting myself just as much as I was hurting my readers, but I love angst. The pain is bittersweet...)

CHAPTER BONUS? YES! SKETCH 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 23: : Re-educating a Slayer IV: Lost Virginity

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N.B.: Location: Muzan's Mansion… Time: Late evening⏰ A few seconds later…

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"Ah…!"

[[HUFF]]

[[HUFF]]

"…!" Tanjirou's breaths were harsh and his wide eyes were focused on Muzan, who was watching him with a mild sort of sadistic interest as his face contorted in pain.

"Have you accepted the reality of your circumstances as yet? ~" Muzan started, "The same tongues you were looking at with such disgust a few minutes ago, are about to stretch open, and claim your ass~"

"Ah…" Tanjirou twisted. "Ungh…!"

Intently examining his prey, Muzan's eyes twinkled with a crude light.

"You look like you're already in a lot of pain, but this is just the beginning, pet~" The Demon King's casual, silvery tone tormented Tanjirou as his tentacle tongue impatiently pressed at Tanjirou's bud. "As a human you seemed to have had quite the penchant for tolerating and overcoming great emotional and physical pain, but can you deal with this type of pain?"

"The pain of sexual torture…of enjoying being humiliated and abused…of losing your virginity…of losing everything that makes you pure to me…" He grinned. "It's different, you know. This kind of pain transcends the physical and is rooted in the psychological. You might even go insane. There's no way you can win against me with this kind of torture~"

"…" Wordlessly, Tanjirou twisted and heaved for air, seeming to be more focused on figuring out what was happening than listening to Muzan.

[[PANT]]

[[PANT]]

"Heh~" A laugh sounded above the distraught boy's heavy grunts and disconnected huffs of breaths.

"Can you tolerate the act of sex with me? Can you overcome the fact that once I claim you, you will be mine forever? ~"

"…!" Those words made Tanjirou sick to the depths of his being. He did not want to belong to Muzan. "Don't! No…! Stop…it—!"

"Getting stretched wide for the first time will hurt…a lot," Muzan interrupted to tell him as his puckered entrance was slowly widened with the tentacle tongue's persistent tip. "But as you're stretched wide and your prostate is stimulated, you'll experience what is known as an orgasm, where you'll be cumming hard as your tight ass squeezes my tongue~" He paused briefly then huffed. "I wonder what you'll feel like inside…~"

"Stop…stop…stop…! Don't…no…I don't want to experience anything…!" Tanjirou protested in a panicked fit, but the tongue, after retracting to lick, stretch, tease and rim his rosebud, had started to push its way in until it was slowly breaching the ring of muscle past his virgin entrance.

"Ahhh…" The strange and new experience of being spread open made Tanjirou's mouth gape in a large gasp. "No….no…!"

The copious amount of fluid coating the tongue and deposited around his anus aided penetration, but…

"So tight…" Muzan muttered, and as he both felt and saw the tongue struggling to go into Tanjirou's ass, he moaned. "Ah…~"

Tanjirou's ass was resisting his intentions to breach it by squeezing down with a mighty force, but with the sight of the puffed out flesh at the boy's entrance clenching and protesting the invasion of his vile tentacle tongue, he grunted, "Just looking at this…is so hot…~"

"Hey…no…Yah!" Tanjirou yelled. "Ouch! Stop…it! That…hurts…!"

While Muzan was relishing in the sight and feel of violating him, Tanjirou definitely was not enjoying the experience.

"No!" He yanked on the tentacles binding his arms as his hips lifted, trying to twist away from the wet tongue that was pressed against and penetrating his ass. "No…no! Tongues shouldn't go in there…! Stop it! Don't put that in my butt! Don't take my virginity…!"

[[Slap]]

"Ah…!" Tanjirou gasped in shock as he reeled from the swift, stinging slap that was delivered across his face. "Muzan-"

"Shut up." Muzan lowered his hand and patted Tanjirou's knee. "What did I just teach you?" He demanded. "Even if I push something in your ass, you're still a virgin. That's not my cock pushing into your ass. Your virginity isn't lost until my cock is in you. I'm not taking your precious virginity as yet, I'm merely preparing you. This is called foreplay. Pay attention and learn your lesson well. Whatever I believe, you must believe as well. That's the way we work, because you are a submissive—you are my pet."

"Ugh…!" Tanjirou's teeth ground together in an attempt to find release for his anger and pain as a little more of the fat, wet tongue pushed up into him. "No…stop…"

"Hmph." Muzan huffed in irritation, but then his frustration faded as his gaze went over Tanjirou's lithe, trembling body that quivered in arousal and pain.

"Damn…I had no idea you'd feel so great in here~" Muzan groaned. "This is unexpectedly a very high quality ass you have, Tanji-kun~~ Hot…tight and—"

"No…!" The burning pain made Tanjirou pull his hips back harder and he was able to move away a little from the tongue so that some of it slipped back out.

"Oh no, where do you think you're going, boy? ~" Muzan's tentacles tightened on his thighs. "Stay put."

"Eh…no…no…!" Tanjirou blinked back his tears, mouth opening into a soundless scream as the tongue rammed its way back inside and further into him.

Yaaaah…!

And as it pushed up without care, widening his passage bit by bit, his muted scream soon gained voice, "Ahhhhh—!"

"When I read your memories[1]," Muzan started casually, ignoring Tanjirou's pleas and pained cry, "I couldn't believe that you'd not only never had any kind of sexual stimulation from another person, but you'd never even stroked yourself once."

"A boy your age who is not even curious about his own bodily urges? Who's never masturbated? Whose main focus was killing me? You really are a weird one. No wonder you weren't sure of what your new demon body craves when it's near me. You're a virgin in every sense of the word." His laughter was derisive. "What were you aiming for? Sainthood?"

"Stop doing that…stop doing that…!" Tanjirou mumbled in a near delirious chant. "Stop putting that thing in my butt…! It can't fit no more…it can't…!" He continued to fight his Master, his voice strained as though he was on the verge of tears. "Stop…!"

[[SQUELCH]]

Sloppily, the tentacle pushed its long, soaking wet tongue up with a bit more force.

"Oh…!" Tanjirou trembled. "Ah…haah…no…it-it's going in deeper…!" He rambled, "It's filling me…ahh…it hurts…!"

"Mm, Tanjirou-kun~" Muzan hummed, humoured by the way Tanjirou was so overwhelmed that he could not pay attention, "Why were you holding on to your virginity? Did you want to be the saint that defeated the Demon King?"

"Well, you pure unfortunate soul…" he paused dramatically and with an evil smile, "…this demon is going to teach you all about the process of sex and defile you in every way imaginable until your pure, saintly body is riding my filthy cock with wild lust~"

"No…!" Tanjirou knew that Muzan was saying all this to mess with his head, but he could not stop panicking, especially when a huge tongue was being shoved into his ass. "No, no, no…!"

"And since you're the star of this show," Muzan added teasingly, "How about we name this episode of your life, "'The Saint That Got Fucked By The Demon King'?~"

"Heh~heh~"

"Stop…!" Tanjirou shouted in response to Muzan's cruel mockery and laughter. "S-stop…! This isn't funny…!"

"Of course it isn't funny~" Muzan said with a lingering grin, "It's not funny—it's absolutely tragic. A sorrowful pity. A disaster of epic proportions—" He stopped midway to wink at the distraught boy "—just kidding~ This is so funny, it's hilarious~~"

"I…" Tanjirou's glower burned into Muzan's smirk. "I'll kill you, you nasty bastard…!"

"Go ahead and do it~~" Muzan invited, leaning closer to him. "My face is right here. Why don't you slap or punch me? Maybe claw my eyes out with those excessively long nails of yours? Hm? What are you waiting for? Why are you taking so long to retaliate~"

"…" Tanjirou tried to maintain eye contact with Muzan, but he eventually had to look away as his pain—and shame mounted.

"Aww~~" Muzan pitied him with a pretentious hum. "Seems like you can't take revenge on me, pet." He leaned away from Tanjirou and smiled, eyes going back to where his tentacle tongue was pushing into him.

"Oh, and what is this…? You're not even loosening up," Muzan's comment was filled with awe as he watched more and more of the tongue fighting to wiggle its way into Tanjirou's body through his slowly stretching asshole. "Ah, but don't worry, I know what to do."

"This virgin ass just needs a thoroughly persistent and expert handling~" he informed him. "One that you'll be sure to get, so don't blame me when I spread this poor little ass of yours wide~"

In the midst of Tanjirou's quiet huffs and groans of pain, Muzan's voice was a mocking lilt. "If you think this is bad now, just wait till you see what comes next. You sure are unlucky that I'm in this form tonight. It's one heck of an experience to have for your first time, but it's your fault for getting me angry earlier[2]. Had you not done that, this torture would not be as aggressive and painful as it's about to become~"

There was a host of fake sincerity in his words, but then Muzan cautioned, despite the look of absolute sadistic exhilaration on his face, "Just wait till I plough my cock into you~~ Losing your virginity when I'm in this form would be hard on your body but don't pass out, okay? I would be pretty angry if you lose consciousness before we're done. There's nothing more annoying than fucking a half-dead ragdoll."

"Argh…!" In spite of Muzan's warning to him, and the obvious fact that the Demon King was not willing to stop whether he begged or cursed, Tanjirou hissed, "Stop this, you jerk! I said no…!"

His expression was a mixture of rage and pain.

"You…dirty, disgusting bastard! ! ! ! What are you doing to me?! I already…I already told you to stop this…!"

"And I already told you that I won't stop," Muzan replied, ignoring Tanjirou's insults. From his point of view, Tanjirou would soon pay for every insulting thing he had ever said to him.

"Muzan—"

"Tanjirou," Muzan said firmly. "Are you trying to tell me what I should do? Who do you think is the Master here?"

"Ugh…!" The tongue had finally stopped pushing into him, and feeling completely stretched more than what he could bear, Tanjirou gritted his teeth against the pain, but as the tentacle tongue moved against, then pressed its tip on one, then another spot inside him, a shockwave of pure bliss went through his body.

"Hah…ah…!" His hips stuttered upward. "Waaa—Ah…?!"

"Bingo~ Found it on the first try~~" Muzan smirked as he watched the boy quivering on his tentacle tongue.

"You know, a human male has something called a P-Spot, which is the equivalent to the female's G-Spot," he explained as Tanjirou panted. "But unlike humans, there are additional points along the length of your colon that respond to pleasurable stimulation~"

"Ah…no…" Tanjirou's voice was like honeyed wine to Muzan's ears.

"Hmm…~" Muzan sighed happily. "Tanjirou….you're a boy who always finds the most intriguing ways to get out of the toughest situations, but this is the end for you. With a body like this, you'll become addicted to the sexual pleasure that only I can give you~"

"Ungh…." Tanjirou groaned helplessly, his expression locked in despair.

"Mmmm…and isn't this just wonderful? ~ You're getting turned on again~" Muzan's hand gently squeezed Tanjirou's hardening cock that had previously gone a bit flaccid from fear.

"…!" Tanjirou folded his lips to not cry out but that effort was useless as Muzan could still see and feel how affected he was.

With the tongue deep inside him, he could feel his little pet's prostate swelling—filling up with his first cum.

And Muzan could not wait to taste its sweet nectar.

"Hmm…Oh Tanji-kun~~your cock is getting harder than before," Muzan teased whilst licking his lips. "And you're already squirting precum, heh~ Told you it'll feel good once your prostate is stimulated~"

"What…?" Tanjirou moaned again and as that tongue continued wiggling while those near his chest began to lick over his stiff peaking nipples, he felt stimulated all over.

"Wait…stop…ah…!"

"Un…!" A bit more fear embedded itself in his heart as Tanjirou felt the budding of an emotion he could not comprehend. It was the same as what he had experienced when Muzan had been holding him down in his dreams[3], and also licking his ear[4]; but now it was even more pronounced.

It was desire, strong and unbidden for the one torturing him, combined with an intensity of pleasure rushing up from his toes, through his legs and right to a point deep in his belly.

And this time, unlike in his dream, it felt as though it was heading toward an endpoint.

Fear and confusion made his eyes go wide, but desire sent them down into half-masts as the feeling in his entire body continued building rapidly.

"Ah…mmm…no…"

His breaths became harsh pants.

[[HAH]]

[[PANT]]

[[HUFF]]

"…!" And then a shiver took him over , sweetening his moans into a dulcet of high pitched cries.

"Ah…ungh…oh…."

What's happening to me…?

What's…happening—?!

xxx

N.B.: Meanwhile, Ubuyashiki Mansion…

The evening had long since diffused into a cold, dark night; one filled with a darkness so persistent and untouchable that the bright stars and haunting moon did naught to ease its gloom.

All this wrought was to create more shadows that clung to the perimeter of nooks and crevices and one such shadow, a man by the name of Iguro Obanai, lurked within the halls of the Ubuyashiki Mansion, even while most of the other Slayers on the compound had already retired to their quarters.

"…" Obanai frowned, a gesture that remained unseen beneath his face bandages as he observed the lone figure in the room beyond the open doorway where he stood.

Tomioka Giyuu, sitting cross-legged and perfectly still on the tatami mat before the fireplace, had not moved an inch in the hour since he had been studying him.

After the meeting they had had earlier that day[CHAPTER II], the Pillars had all—excepting Giyuu—congregated for dinner with Kiriya and the Ubuyashiki twin sisters, Kuina and Kanata.

It was a grand affair, but never before had he attended such a great feast that felt more like a post-funeral meetup than the social event that it was meant to be.

Everyone present was in a sour mood. No one spoke, and because he had spoken with Mitsuri right after their big meeting and before that dinner about everything that was currently taking place, he felt as though he was more attuned to everyone's grief and the fake expressions of normalcy they put up in order to act as though they were doing fine.

Nothing made their failures feel more real than that group dinner.

One month earlier, prior to having been split into teams to carry out their search for Tanjirou across Japan, they had been so hopeful that the boy would have been found. But one month after the fact, none of them had any good news worth celebrating to report.

And every account given only showed more and more, how much of a mastermind Muzan was in plotting his scheme to disappear with Tanjirou.

In the end, the atmosphere at that dinner was so dismal that even Giyuu's normally invisible presence was noted in his very real absence from their gathering.

Tomioka Giyuu… Obanai thought while pondering this and all the things Mitsuri had told him about their fellow Pillar, …before, I would have scolded you for breaking the rules of the Corps and refusing to eat with us.

I would have accused you of deliberately disrupting our teamwork.

Before…after hearing about what you had been attempting at Natagumo, I would have told you that what you feel is insignificant to the bigger picture and I would have repeated to you what I had told Tengen—that you had no free choice in choosing to leave us [5] .

Ultimately… I would have wondered whether your life was so meaningless that you wanted to throw it away.

But ...now I understand—Tanjirou was just that important to you.

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xxx

Cut away the despair
Even with all I've lost, even with all I've lost
I have no choice but to keep living
Even if I am beaten down
There are things to protect

— Kamado Tanjirō no Uta (Tanjirō Kamado's Song)

Search for brownsugarprod1 to view My group's TWITTER !

Chapter Bonus?: Please see my twitter for the link to the:

- ART BONUSES! Both for the last chapter and this one! This chapter has GUEST ART: GIYUU SKETCH BY KETSALISTLI!

- Arc banner

- Chapter meme

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The bonuses are always on Privatter (unless they're excessively NSFW. Then they'll be on Gumroad). Remember, if you want to see a history of all the posted media, you can click on the "Media" tab in My group's twitter or go to the link in the header 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 V: To Die or Not to Die…

Next Chapter Teaser: While Tanjirou suffers greatly, Giyuu Tomioka, being the one who had introduced him to the life of a Slayer, struggles to accept the way things have become, but in the sea of his despair, he gets help from an unexpected source.

NOTE: The next two chapters will divert to show the Hashiras and what's been happening while Tanjirou was missing so plz don't complain about the diversion—remember, this isn't a Porn Without Plot; it's a Porn With Plot and you need to know what they are doing so that you will understand later events…

NEXT UPDATE MESSAGE: I will see you all in two weeks for the next update. I have soooo much work to do in that time (as usual). I'll be buried under a pile of writings that need to be edited and scenes that must be written.

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END NOTES SECTION- Where the Author discusses (makes fun of) their characters' actions from that chapter

(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. "Well, you pure unfortunate soul…"

Author: When I wrote this I was reminded of the Disney song with the line 'You poor unfortunate soul'

a. "And since you're the star of this show," Muzan said teasingly, "How about we name this episode of your life, "'The Saint That Got Fucked By The Demon King'?~"

"Stop…" Tanjirou shouted in response to Muzan's cruel mockery and laughter. "S-stop…! This isn't funny…!"

Author: Sorry Tanjirou, I was laughing so much when I wrote this…

b. "Go ahead and do it~~" Muzan invited, leaning closer to him. "My face is right here. Why don't you slap or punch me? Maybe claw my eyes out with those excessively long nails of yours? Hm? What are you waiting for? Why are you taking so long to retaliate~"

Author: Muzan is such a jerk xD I envisioned him leaning close to Tanjirou's face, grinning and mocking him as he said this.

-2 "You're so unlucky that I'm in this form tonight. What an experience to have for your first time, but it's your fault for getting me angry earlier."

Author: You'll see why he said Tanjirou is unlucky to be fucked while he's in his Combat Form :o

-3 'What's happening to me…?'

Author: I wonder…:)

-4 "…after hearing about what you had been attempting at Natagumo"

Author: hmmm…what did Giyuu attempt to do at Natagumo while Tanjirou was missing…?

IMPORTANT NOTE: Tanjirou may seem to be contradicting himself a lot in this when at one time you would see him wishing for death, and at another time you'd see him reminding himself that he has to hold on in order to win against Muzan and not be taken over. This is because of his rampant emotions. He's in turmoil right now (and will be even more stressed later) so his thought process isn't clear and this disparity is clue that his mind is already at odds and slowly breaking.

REFERENCES / IMPORTANT FOOTNOTES:

[1] "When I read your memories" Author: Muzan read Tanjirou's memories in Chapter 4

[2] 'but it's your fault for getting me angry earlier' Author: Muzan's referring to chapter 5 where his form changed into the Combat Muzan after Tanjirou kicked him out of his dream.

[3] 'It was the same as what he had experienced when Muzan had been holding him down in his dreams' Chapter 4; Bond II: The Master and His Pet

[4] '…licking his ear ' Chapter 9, Cat

[5] "I would have told you what I had told Tengen—that you had no free choice in choosing to leave us" Author: this is a reference to Manga Chapter 97; when he had told Tengen that he would not accept his resignation from the Corps and that he had a responsibility to stay as the number of youths were declining and their ranks had already taken a hit with Kyojuro's demise.

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