The next morning, in Ye Xiao's room.
The two lay on the bed, naked and embracing in sleep.
It was Ye Xiao and Butterfly Kanae.
After a while, Ye Xiao slowly opened his eyes, then leaned against the headboard and slowly sat up, letting out a yawn.
Kanae, still asleep, had her arms wrapped around Ye Xiao's waist.
Ye Xiao smiled and opened his system, as he hadn't yet claimed his Familiar reward.
"Open the gift package."
"Congratulations, Host, you have received: Sun Breathing."
Looking at the prompt on the light screen, Ye Xiao stroked his chin.
"Sun Breathing, huh? This reward isn't bad, but I'd rather have Yoriichi's talent."
After all, Kokushibo could unleash an unknown number of slashes in a second, and Ye Xiao even wanted this guy to be his Knight.
"By the way, there shouldn't be any problem with a Demon using Sun Breathing, right?"
Ye Xiao was also a bit curious.
However, the physical structure of Demons and humans should be no different, so there would be no burden in using Sun Breathing.
Then, Ye Xiao opened his entire panel.
"Host: Ye Xiao Astaroth."
"Bloodline: Pureblood Demon."
"Abilities: Conqueror Formula, All-Purpose Magic, Spring of Magic (Blessing of Home), Annihilation Magic, Mangekyo Sharingan (Obito), Sun Breathing."
"Sacred Gear: Azure Innovation Garden Box, Ultimate Karma."
"Familiars: Grayfia (Mutated Queen), Yotsuya Miko (Pawn), Butterfly Kanae (Knight), Elsa (Mutated Piece 8)."
"Permanent World: Demon Slayer."
"Hmm? Permanent World?"
Ye Xiao also looked at it in confusion.
He then understood that this world had been marked, so he could travel back and forth between his own world and the Demon Slayer world.
"This is truly an unexpected surprise."
Ye Xiao couldn't help but sigh as he looked at the panel.
After all, there were still many talented individuals in the Demon Slayer world.
He just wondered if he could turn Akaza and Kokushibo into Demons; if so, even resurrecting Kokushibo to be his Familiar would be acceptable.
Of course, this was just a thought, as his goal was a Demon harem.
Closing the panel, Ye Xiao also took out a magic book on soul magic and began to read it.
After all, the Demon Slayer world also had souls.
He was looking forward to seeing if Muzan would explode when he saw Kokushibo fighting in his stead.
Time passed bit by bit.
Kanae, who was holding Ye Xiao, slowly opened her eyes.
Her eyes were a bit dazed.
An unfamiliar place, an unfamiliar ceiling.
Where was she?
That's right!
Kanae also came to her senses.
She remembered she was fighting an Upper Moon and had summoned a Demon.
"Was what happened yesterday a dream?"
"Last night was not a dream, oh."
Hearing the male voice, Kanae's gaze instantly focused, and seeing the naked Ye Xiao beside her, her face immediately turned crimson, startling her so much she almost cried out.
Kanae also realized she wasn't wearing any clothes.
She instantly rolled up the blanket and huddled in a corner, then pointed at Ye Xiao, who was exposing himself in front of her, and said, "You... who are you?"
"Ye Xiao."
Listening to Kanae's words, Ye Xiao also spoke his name, then pulled a sheet to cover his 'little brother' and continued reading his book.
Kanae looked at the scene; both of them were naked.
Then Ye Xiao was her husband.
But... her first time was given away in a daze.
Now looking at Ye Xiao's face, it seemed somewhat familiar, and Kanae quickly remembered, then asked uncertainly.
"You... you are Mr. Demon?"
"Of course." Ye Xiao put down the book in his hand and looked at Kanae, saying, "By the way, do you feel any discomfort in your body?"
"Body?"
Kanae then realized that her breathing no longer hurt, and there was an inexhaustible power within her body.
"Nothing serious."
"It seems the treatment was good."
Kanae was a bit puzzled; her frostbitten lungs should have been difficult to treat.
Kanae was also confused: "Treatment?"
Ye Xiao looked at Kanae and casually said, "Of course, I injected my magic power into your weakened body, but your physique is quite good, and you recovered very quickly."
After hearing Ye Xiao's words, Kanae nodded, indicating she understood, but what kind of treatment required one to be naked?
Perhaps understanding her meaning, Ye Xiao continued.
"The transfer of magic for healing can be done through ordinary contact, but due to your severe frostbite yesterday, intimate contact was necessary for rapid healing."
Kanae, after hearing this explanation, though still a bit shy, reluctantly accepted it.
She also accepted the fact that her husband was a Demon.
She recalled her battle with the Upper Moon last night, still shaken.
"What about Upper Moon Two? Was he eliminated?" she asked nervously.
"Don't worry, since I intervened, he was naturally dealt with by me."
Hearing his words, Kanae breathed a sigh of relief, feeling even more awe for Ye Xiao's abilities.
It was good that Upper Moon Two was dead, as his abilities were very unfavorable to swordsmen who used breathing techniques.
"By the way, you are a Demon now, oh~"
"Ah?"
...
Meanwhile, in the Demon Slayer world.
The atmosphere in the Demon Slayer Corps was somewhat somber; all the Pillars were in silence.
After all, the passing of a Pillar was already very heavy, and the Wind Pillar left the headquarters without a word.
The Stone Pillar silently recited Buddhist scriptures.
Sending the child he recommended to reincarnation.
The other Pillars also placed a fresh flower on the Flower Pillar's cenotaph.
In the Butterfly Mansion.
Kanao Tsuyuri stood by the well, wanting to cry but unable to.
Shinobu Kocho, meanwhile, wore her sister's last hair ornament; the once lively and cheerful Shinobu Kocho had disappeared, and she now wore a mask of a smile. She wanted revenge but didn't know how to find it.
She only knew it was Upper Moon Two.
Compared to the somber and sad atmosphere of the Demon Slayer Corps, Muzan was already furious.
In a villa somewhere in Tokyo.
A child's forehead was currently bulging with veins.
Several adult corpses lay nearby, blood pooling on the floor.
That's right, this child was Muzan Kibutsuji.
"What is Douma thinking? Is it fun to go out and sunbathe first thing in the morning?!"
Saying this, Muzan slammed his fist on the table, and the table instantly shattered into pieces.
Because Ye Xiao had altered Douma's memory to make him suddenly want to sunbathe, so he ran out early in the morning to sunbathe.
And then he got himself killed by the sun.
To be precise, when modifying Douma's memory, Ye Xiao was too lazy to even bother fabricating a story.
Muzan, who had finished receiving the memory, was now a bit depressed.
After all, no Upper Moon had died in a hundred years.
Today, an Upper Moon position was vacated, and what's more, he killed himself by willingly going out to sunbathe.
It was incredibly absurd.
After calming down for a while, Muzan also gave an order.
"Phew~ Nakime, summon the other Upper Moons, meeting!"
"Yes, Lord Muzan."
Time passed little by little, and all the Upper Moons arrived.
Akaza stood alone on one side.
For some reason, Akaza felt refreshed and invigorated, and even his mood was incredibly comfortable.