The demons' main base, the Infinite Castle.
This was a city that existed in a different dimension.
As far as the eye could see, there were layers upon layers of Japanese-style buildings.
In this city, there was no up, down, left, or right; space was completely chaotic.
Naturally, only a demon's Blood Demon Art could create such a peculiar city.
The one in charge of this city was Nakime, who succeeded Akaza as the new Upper Moon.
Originally, with Nakime's strength, it would have been impossible for her to inherit the title of Upper Moon.
However, her ability was very useful and convenient for Muzan.
With just a thought, she could quickly summon demons scattered across various locations.
"Muzan-sama, are you summoning us this time because of Akaza? Was Akaza really killed by a Demon Slayer…?"
Upper Moon Two Doma didn't finish his sentence when Demon King Muzan suddenly turned his head and glared.
24!
Upper Moon Two Doma's body was sent flying by an invisible force, collapsing several houses, and blood spilled out.
This scene immediately scared the other Upper Moons into silence, not daring to speak.
Three days had passed since the Infinite Train incident.
However…
These past three days, whenever Muzan thought of Akaza's strange death, he couldn't help but feel an extremely ominous premonition, leading to a stress reaction.
To completely eradicate and solve this problem, there was only one method.
That was to find a demon who could overcome the sun, consume her, and evolve himself into a true ultimate being.
Tonight.
He had specifically instructed Nakime to summon the Upper Moons for a meeting, not to discuss the cause of Akaza's death, but rather…
"Upper Moons, it seems I have been too lenient in my supervision of you, leading to your excessive idleness, as there is still no clue regarding the Blue Spider Lily."
Demon King Muzan spoke coldly.
"Yes!!!"
Aside from Kokushibo and Doma in the rubble, the four Lower Moons were all prostrate on the ground, trembling, not daring to speak.
"However, the search for the Blue Spider Lily can be put aside for now. I have a more important task for you to do!"
Demon King Muzan changed the subject.
"Please give your command, Muzan-sama. Your subordinate will go through fire and water without hesitation!"
Upper Moon Five Gyokko said decisively.
"Muzan-sama's wish is Daki's wish. Daki will definitely do her best!"
Upper Moon Six's… accessory younger sister, Daki, spoke immediately after.
"Hmm!"
Muzan nodded, his expression slightly better.
"I need you to find a demon! Once found, no matter the cost, you must bring her back!"
"What kind of demon?"
All the Upper Moons looked serious.
From Muzan's words, they heard infinite longing.
At the same time, doubts arose in their hearts.
In their understanding, Muzan was the progenitor of demons.
All the demons in this world were created by Muzan.
And were directly or indirectly controlled by Demon King Muzan.
However…
Muzan needed them to find a demon?
What kind of demon was it that even Muzan, the Demon King, couldn't find?
The next second, their inner confusion was resolved.
"That is a demon who has escaped my control! A demon who may have overcome the weakness of demons and can walk in the sun!"
Kibutsuji Muzan's face was filled with anticipation and hope.
"Muzan-sama, how can there be a demon who can…"
"Understood! We will do our utmost to fulfill Muzan-sama's wish!"
Gyutaro quickly interrupted his thoughtless sister's questioning of the scumbag boss Muzan.
Just then.
"Hmm?"
Upper Moon One Kokushibo suddenly felt something, and abruptly looked up.
Above them, in a certain part of the Infinite Castle's sky.
A deep purple vortex slowly appeared and expanded.
Immediately after, figure after figure walked out from within.
…
…
Time rewound a few minutes earlier.
The Ubuyashiki Estate deep in the mountains.
A grand welcome and celebration banquet lasted from day to night.
Everyone was well-fed and satisfied, and the banquet was a joyful occasion for both hosts and guests.
At the same time, 737 at the banquet.
Tanjiro, Inosuke, and Zenitsu Agatsuma vividly recounted the entire Infinite Train incident to the Pillars.
Especially the appearance of Luo Lin's group at the end, their powerful suppression of Akaza, the miraculous flame that healed Kyojuro Rengoku, and Nezuko's recovery to being able to walk in the sun…
Upon learning of all these events, the Demon Slayer Corps Pillars, even the unruly Wind Pillar Sanemi Shinazugawa, no longer doubted Luo Lin's power and unfathomable nature.
The straightforward and boisterous Demon Slayer Corps' beautiful and fierce girl, Love Pillar Mitsuri Kanroji, emboldened by alcohol, requested Luo Lin to defeat Demon King Muzan.
To Mitsuri Kanroji's request to do anything, Luo Lin, also emboldened by alcohol, readily agreed.
And, he acted immediately.
His powerful divine sense instantly radiated across the entire island nation.
In just a moment, Luo Lin had already located the alternate dimension where the Infinite Castle was located.
The time for the decisive battle had arrived!!!
…