Seeing Muzan's slightly dazed expression, Ryuya guessed that his father probably hadn't even processed what had just happened.
"Wu Ya, from today onward, you are Upper Rank Four. Perform well."
Muzan shot him a sharp glare, still clearly fuming.
After absorbing Muzan's blood, Ryuya's crimson eyes shifted—the characters of Upper Rank Four appeared within them.
Originally, Muzan had been in a good mood.
But after that embarrassing display…
Losing face in front of all the Upper Ranks was something he absolutely could not tolerate. He was already prepared to leave this troublesome place.
"Nakime, send me out."
"Yes, Lord Muzan."
Nakime glanced curiously at Muzan's feminine attire. She hadn't commented—but she had definitely been observing it for a while.
With a pluck of her biwa, Muzan disappeared from the Infinity Castle.
The moment he left, the tension vanished.
All the Upper Rank Demons subtly relaxed.
"Hey, Miss Nakime, Sister Daki—did you notice something?" Doma asked with a playful smile.
"What?" Daki tilted her head in confusion.
She actually had a decent impression of Doma—at least he wasn't ugly.
Nakime remained silent. She didn't particularly like Doma.
"Just now, Lord Muzan was wearing a woman's kimono."
Doma's eyes curved mischievously.
"Oh? Really?" Daki's interest was instantly piqued.
"A black one," Ryuya added casually.
"Black?!"
Daki's eyes widened in shock.
"Last time Lord Muzan borrowed one of my kimonos—it was black! Could it be… could it be that one?!"
That particular black kimono had been so long it dragged across the floor. She had nearly considered it ruined.
And Muzan had not only taken it—
He had worn it himself?
Daki's little heart trembled from the revelation.
"Oh~ so Lord Muzan has a cross-dressing hobby?" Doma mused dramatically. "Young Master Ryuya, you would know best. Care to enlighten us sisters a little?"
Daki looked expectant.
Even Nakime, though quiet, seemed faintly interested.
Ryuya stared at Doma speechlessly.
You are a grown man.
Since when did you become "one of the sisters" with Daki and Nakime?
Unbelievable.
Then again…
It was Doma.
Nothing he did was surprising.
As for Muzan's specific hobbies—
Ryuya truly didn't know the details.
He knew Muzan had quirks.
But not the full extent.
At that moment, a notification surfaced in his mind.
[You have advanced to Upper Rank Four. Talent awakened: Blood Ecstasy.]
[When blood spreads through the air around you, your combat ability will be greatly enhanced.]
Ryuya's lips curved slightly.
Interesting.
"Oh oh oh, Young Master Ryuya is shaking his head. Does that mean he doesn't know—or doesn't want to say? So sad, so sad!"
Doma wiped imaginary tears.
Gyokko watched with fascination.
Akaza remained silent but did not leave.
Clearly, even the most elite demons were interested in their boss's gossip.
Kokushibo felt an indescribable strangeness.
The moment Muzan left, they were openly discussing him.
He hadn't participated—
But simply standing here made him feel complicit.
After a brief silence, he spoke calmly.
"Miss Nakime, please send me out of the Infinity Castle."
With that, Kokushibo departed.
Without Kokushibo's presence, Doma's gossip squad failed to extract any further information from Ryuya.
Instant disappointment.
Bored and unwilling to return to the Eternal Paradise Cult, Doma turned to Daki.
"Sister Daki, shall Big Brother Doma take you out to play?"
"I don't want to!"
Daki rejected him instantly.
Her gaze drifted toward Ryuya, soft and shy.
"I only go on dates with Brother Ryuya."
Gyutaro immediately intervened.
"Miss Nakime, send my sister and me to Yoshiwara."
He had no intention of letting Doma continue hovering around Daki.
With a pluck of the biwa, the siblings vanished.
"Oh~ how heartless. Leaving just like that?"
Doma drifted toward Nakime next.
Before he could speak—
"I refuse."
Nakime's answer was immediate and cold.
Doma: …
Unfazed, he turned again.
"Young Master Ryuya, would you like to visit the Eternal Paradise Cult?"
Before Ryuya could respond—
Akaza cut in.
"Ryuya, the matter you entrusted to me has been handled."
"Oh?"
Ryuya's eyes sharpened slightly.
That quickly?
"Yes. However, the Hashira of the Demon Slayer Corps have already learned of it. According to reports, they are mobilizing to rescue him. Shinazugawa Genya is currently restrained inside my dojo. Shall we go now?"
"Go."
There was no hesitation.
The Demon Slayer Corps must not be given the slightest opening.
This time, Shinazugawa Sanemi would learn a painful lesson.
A chilling glint flickered in Ryuya's crimson eyes.
Rescue him?
Good.
Let's see if they can.
"Nakime, send Akaza and me to the dojo."
"Yes, Young Master Ryuya."
With another pluck, the two vanished from the Infinity Castle.
Nakime lowered her gaze slightly.
If ordinary slayers came, it wouldn't matter.
But if multiple Hashira appeared…
Even so—
She trusted Young Master Ryuya.
"Oh? Miss Nakime, I heard that too. Could you send me there as well?"
Doma's eyes lit up.
Now this sounded fun.
The Hashira of the Demon Slayer Corps.
How long had it been since he'd seen fresh faces among them?
And that former Flower Hashira who had been turned into a demon…
He hadn't heard anything about her in a long time.
He truly wondered—
Was she still in this world?
...
Author's Note:
The full completed version of Demon Slayer: Son of Muzan (Completed) is now on Patreon!
🔥 I also have an Additional 18+ fanfics now available for readers who enjoy exclusive mature stories. 😉
1.Dragon Ball: Oolong's Sex Adventure
2. Elements of Lust – ATLA & Korra Mixed Smut
3. Doraemon: Filtering with Nobi Tamako
4. The Naive Me Who Became Someone's Everyday Secret
5. High School DxD: Rias Gremory, the Phenex Bride
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