FULL STORY SUMMARY

Rated E for explicit. Reader discretion advised.

The Progenitor of Demons, Kibutsuji Muzan and his mate, Kibutsuji Mujōna aim to achieve world domination and annihilate the Demon Slayers. The remaining Hashira along with Kamado Tanjirou, Agatsuma Zenitsu, and Hashibira Inosuke band together to defeat The Demon King and Queen.

AUTHOR'S NOTES

You guys are gonna love this arc. (NOTE: EVERYONE IN THIS STORY IS 18+ EXCEPT NEZUKO, WHO WILL NOT BE IN ANY SHIPS AND RARELY MENTIONED. I REFUSE TO WRITE THAT SHIT)

💗THANKS FOR READING💗

MEDIA DICTIONARY

* Thoughts

* "Dialogue."

* 'Telepathic dialogue.'

* '"Hearing someone's thoughts.'"

* "Past conversation."

* {Sound}

* [Movement]

MUZAN

Still furious about what happened earlier, Muzan decided to check on Tanjirou. He had the unconscious newly converted demon transported to his lab. There, the boy laid strapped to a metal slab.

With metal instrument, Muzan took an analysis of his body. He pulled the boy's eyelids, flattered that Tanjirou's eyes favored his. The boy's Demon Slayer Mark had intensified, covering more of his face.

Just like Kokushibou. Interesting…

He then peered into Tanjirou's mouth, seeing that he now had sharp fangs. Muzan checked his vitals and concluded that everything looked fine.

Tanjirou's transformation went well. Now I must handle the other slayers…

With a sigh, he decided that it was time for Mujōna to be released.

MUJŌNA

It felt like she had been imprisoned in her chambers for days. Periodically, she would speak to Muzan, but he never responded.

Mujōna laid on her bed, feeling a multitude of emotions. She felt sad, angry, hurt, and confused. All of the previous excitement made her feel nauseous and lightheaded. The pregnant demon paced back and forth, and even vomited a few times. Her unborn child squirmed inside of her, feeling uncomfortable as well.

'Muzan, please let me out. You can't lock me away forever!'

Suddenly, the door opened. She sighed with relief and waddled out of the chamber. The walls and floors automatically shifted, bringing her to Muzan's laboratory. There, she saw him waiting for her with a displeased expression.

Tanjirou was still unconscious and strapped to a table. Moments later, two guards entered and took him back to the dungeon.

The couple stared at each other in silence for a few moments, until Mujōna spoke.

"Where's Nodoka? Muzan, if you killed her—"

"Nodoka is fine. She's with Kokushibou," he sighed. After a few moments, he said, "How do you want to handle the others?"

"I want them all converted, then we'll win them over. We can mold them into willing soldiers."

"Conversion will be feasible, but I doubt they'll work with us; they're still devoted to their pitiful cause. It'd be better if we force them to bend to our will," he said, referring to the sacred link that all demons had to him.

"Muzan, it would be better if we compromised and won them over. I promised The Serpent Pillar that I'd reunite him with the girl if he cooperated," Mujōna said.

An angry look flashed across Muzan's face a few seconds, a vein on his forehead pulsing. "You did what?"

"Don't be angry with me! I did what I had to do at the time. He was weak and vulnerable, and I want as many slayers converted as possible."

"Sometimes, I wish you'd speak with me before you do things like this; you're impulsive. We aren't supposed to be making deals with our enemies, we're supposed to subjugate them," he hissed.

"I know that. We've successfully gathered six powerful slayers and already converted two of them. The others will be turned as well, so we're in the clear. Reuniting them won't do us any harm."

Mujōna took his hand and kissed it lovingly. "We've already won, Muzan."

With a small sigh, he relaxed. "How are you feeling?" he asked while caressing her stomach.

"I'm feeling fine now that you're here. She was moving a lot," she laughed.

Muzan smiled and bent down to kiss her stomach. Mujōna finally felt at peace and at ease after making up with Muzan, but something deep down was still bothering her.

…The servant!

Muzan lifted his head and stared at her with a confused expression. "What servant?"

Mujōna began to feel nervous and uneasy. She slightly backed away from him, breathing heavily. The image of the female servant's eyes flashed through her mind.

"Mujōna, are you all right?" he asked her, growing concerned.

"Muzan, I—"

"What is it, darling?"

Unable to keep her concerns hidden any longer, Mujōna confessed. "Muzan, if I asked you to stop doing a certain thing, would you listen?"

Muzan looked confused for a few seconds, then a knowing expression crossed upon his face. He exhaled deeply, causing the atmosphere to grow eerily tense and dark. Mujōna backed away from him even further.

"I thought you weren't afraid of me," he sighed.

"I thought so as well, but that was before I knew more about what you do."

He took a step closer to her. "So, I take it that you're thinking about leaving me, hm?"

"What? No, I—"

"I knew you would get second thoughts eventually; I just didn't know when," he said, taking another step towards her.

"I'm not getting second thoughts!" she retorted. "I'm just not comfortable with some of the things you do, Muzan." She took one step away from him.

"Of all the things we've both done, this is the one thing you're not comfortable with?"

"Muzan, taking people's souls is just too much! I'd rather you just kill them. Taking their souls is just… cruel."

Muzan stared at her with an apathic look in his eyes. "Cruel?"

Mujōna gulped and her legs became shaky. "Yes, cruel."

"How so?"

"Because you prevent their spirits from moving on. I—"

He stared blankly at her and said, "Yet, you have the ability as well."

Mujōna's eyes widened in disbelief. "I—I don't have—"

"We both have the ability and so will our child. We're omnipotent beings that must restore order and balance to the human realm. Anyone who falls out of line will be disciplined."

He then took long strides towards her and wrapped his arms around her. "I thought your metamorphosis would enlighten you, but it seems that your old mindset has returned…"

He then started kissing the crook of her neck and groped her ass. With his other hand, he went under her kimono and tugged at her panties. She let out an unwilling moan in his arms, feeling aroused.

"Muzan, I'm seri—Ah!"

He suddenly dove into her wet folds, massaging them in a steady motion. Mujōna reluctantly started grinding on his hand, breathing heavily. He used his thumb to rub her clit, gradually applying more pressure. As his speed increased, so did her grinding. She moaned as she leaned on him, fearing that she'd might met from the fiery intensity of her arousal.

Muzan continued his lustful assault until she climaxed minutes later. Her warm juices coated his fingers, glistening under the fluorescent lightening. Angry with herself for letting him dominate her once again, she mentally scolded herself.

I'm so weak…

He smirked at her as he licked his fingers, pleased with himself. "If it bothers you that much, then I promise to only use it on rare occasions."

Once her orgasm subsided, Mujōna said, "Please return her soul. I don't want to see anyone else like that ever again!"

"Fine. Now let's get started on the slayers."

MITSURI

Mitsuri hung upside down on the side of her bed, bored. She didn't know how much time has passed since her capture. She indulged herself in a couple nearby books, but nothing could keep Obanai and her friends out of her mind.

Oh, I hope he's—they're doing alright! I miss them so much…

Suddenly, she smelled a familiar intoxicating fragrance that smelled of roses and vanilla. The powerful presence neared, causing her to stand alert and stare at the door.

It's my Queen! Wait, what am I thinking?

What Mitsuri didn't know was that becoming a demon had altered her mind as well. Having Mujōna's blood in her system made her more docile and compliant. An unwavering loyalty to the Demon Monarchs had already corrupted her, but not completely; her Demon Slayer heart still throbbed weakly.

The door opened and Mujōna entered, her skin glowing and her cheeks having a subtle blush; she looked ravishing as always. Mitsuri felt her heart skip a beat and the urge to kneel, but she tried to fight it.

Please…

"I've decided to let you see your beloved Obanai, Mitsuri," Mujōna said.

"Please let me see him!" Mitsuri begged, tears threatening to pour out of her eyes. "You have to let me see him!" She fell to the ground and started crawling towards Mujōna, trying to touch her feet. "Please!" she sobbed.

"Ah, calm down and stop touching me!" Mujōna snapped.

Mitsuri composed herself, sniffling.

"You shouldn't let a man have that much control over you," Mujōna muttered under her breath, slightly blushing as she thought about Muzan. "Anyway, I'll let you continue being with Obanai on one condition."

"R-really? What's that?" Mitsuri whimpered.

"Convince him to become a demon."

No, not that!

Mitsuri gasped in horror. "Wait, no! I can't do that! I've already became a demon myself and I hate it, so I can't do that to him!"

"Fine, so I'll just tell Obanai that you didn't want to see him. You're such a cruel lover, Mitsuri," Mujōna said as she started to leave.

"Wait, don't leave! I'm not a cruel lover! I'll only do it if you promise me that I'll keep seeing him!" she sobbed.

Pleased by her surrender, Mujōna beamed. "I promise. Now, consume more of my blood." She then pulled out another altered version of her blood and gave it to the distraught demon.

Mitsuri shakily opened the vial and took a sip. Seconds later, she fell to the floor, writhing. Except this time, she wasn't writhing in pain; she was writhing in pleasure. An indescribable euphoric pleasure filled her entire body. She felt waves of lust wash over her; her nipples hardened, and her vagina clenched in need.

Mitsuri looked at her beautiful Queen, who was watching her. Dirty, perverted thoughts began swirling in Mitsuri's fragile mind. She unconsciously began touching her privates as she analyzed every inch of Mujōna, breathing heavily.

She's so pretty and her breasts are so big! I want to suck—no, I can't think like this! I only want Obanai! Oh, Obanai…

"Are you finished?" Mujōna asked, growing impatient. "Follow me and bring that vial with you."