Infinity Castle!
"Dammit, failed again. Failed again."
Kibutsuji Muzan's expression twisted, veins bulging on his forehead.
Crash!
With a wave of his hand, all the experimental equipment before him shattered into pieces.
"Blue Spider Lily, where is it?"
His voice was low, casting a shadow over the brightly lit room.
"Worthless, all worthless. I've created so many Demons, yet there's no clue about the Blue Spider Lily. What use are..."
Muzan's words came to an abrupt halt because unfamiliar images appeared in his mind.
This was his ability!
When a Demon died, its memories would be transmitted to him.
Especially when it came to the Upper Ranks, he would examine them carefully.
To be wary of another monster like the one from hundreds of years ago that had driven him into a corner.
"Doma... died?"
Muzan's crimson pupils contracted, a flicker of disbelief in his eyes.
If Doma had died, he would at most be surprised.
But this was too strange.
The other party's dying image was only an instant.
It seemed like he had been struck by lightning.
'But how could a human possibly wield such power?'
'Could there be Demons in this world that I didn't know about?'
'Or perhaps... I wasn't the only one.'
"No, absolutely nothing can escape my control."
Muzan gritted his teeth. "Pass the order. All the Demons in that area are to mobilize."
"I want to know the details of the person who killed Doma."
Clang clang!
There was no response, only the clear sound of a biwa echoing through the Infinity Castle.
…
The nighttime streets were quiet!
Few pedestrians remained on the road.
Ayato led the two women to a place to stay.
Flipping through the book, Kanae said in surprise, "Master's status is even above the gods?"
As she spoke, she couldn't help but look at Ayato.
'Slaying gods and seizing their authorities...'
'Could Master even do something like that?'
'I had truly followed an incredible existence.'
"Yes. The power of blessing was taken from the gods."
Mitsuri said excitedly. "And Master comes from another world. I wonder what it's like."
"Ah, another world?"
Kanae blinked.
She had only just started the basic knowledge and didn't know about this aspect yet.
"Mm."
Ayato nodded and smiled. "Besides that, there are two other worlds, each with different scenery. I'll take you to see them when there's a chance."
"Great!"
"Thank you, Master."
Kanae and Mitsuri both showed looks of anticipation.
"But no hurry. There are still some things to take care of in this world."
Mitsuri said, "What things?"
"Of course, it's about Muzan. These so-called Demons are causing Kanae so much trouble, so of course they need to be dealt with."
Kanae said joyfully, "Thank you, Master."
"It's the least I should do."
Ayato smiled. "And this world isn't bad. It can be brought under control."
"Ah?"
Kanae was stunned, then asked instinctively, "Master, you want to conquer the world?"
'If that happened, wouldn't many people die?'
She was a little reluctant.
"Don't worry, there won't be too much turmoil."
Ayato waved his hand. "A world like this isn't worth starting a war over."
Each world had a different approach.
In the end,
The two worlds he had conquered before were more or less related to his servants' wishes.
For this world, he didn't plan to change it drastically.
He only needed to control a small number of high-level figures to bring the world under his sway and use its resources for his benefit.
For those corrupt rulers, nothing was more tempting than the supernatural and immortality.
Of course,
He wouldn't take them as servants.
As long as he cracked the secrets of Muzan and the Blue Spider Lily,
He could wholesale immortality.
He had always thought that Muzan, the Demon King, was truly a piece of trash.
Even an incomplete version of immortality, if used well, could have controlled the country's upper echelons.
Why bother with so much back-and-forth with the Demon Slayer Corps?
Hearing this, Kanae breathed a sigh of relief.
'As long as there were no large-scale casualties.'
She felt having the country controlled by those corrupt people was truly worse than being ruled by Master.
Just then, the sound of a crow came from afar.
"Master, someone seems to be coming. And they're moving fast. Another Demon?"
"Mitsuri, don't be nervous. That's a Kasugai Crow. It should belong to our Demon Slayer Corps."
Kanae felt the crow's voice was somewhat familiar, then was overjoyed. "Master, it should be my sister."
Ayato nodded. "Since we've encountered her, let's go meet her."
The three walked quickly and soon saw a figure running toward them.
She was a beautiful girl wearing a haori, with short black hair and a serious expression.
"Nee-san!"
"Shinobu!"
The two met, both filled with joy.
Ayato also looked her over.
'Sure enough, it's Kocho Shinobu.'
'But her personality and attire were vastly different from the original plot.'
But that made sense.
Ayato remembered that she had changed after her sister's death.
"Nee-san, who are they?"
Kocho Shinobu had obviously noticed Ayato and the other two and asked with some confusion.
"This is Kanroji Mitsuri."
Kanae introduced. "And this is my savior, and now my Master."
'M-Master?'
Hearing Kanae's introduction, Shinobu was completely dumbfounded.
'What kind of address was this?'
'What was the relationship between this man and Nee-san?'
'But an address like "Master" was clearly abnormal.'
"What did you do to my sister?"
Coming to her senses, Shinobu immediately became angry.
In her opinion,
Her sister had most likely been threatened.
Otherwise, how could she use such an absurd address?
"Shinobi, don't be impulsive."
Kanae, who knew her sister well, had already pulled her into her arms.
"Calling him Master also means he's my husband."
'H-H-H-Husband?'
Hearing this, Shinobu's eyes widened.
'Was this some kind of husband and wife role-play?'
'But since when had Nee-san become so bold?'