Muzan was angry, but not completely angry.
The current situation was that Nakime had suddenly slipped out of his control. No matter how he tried to command her, she showed no signs of movement.
He couldn't even get her to use her ability to take him away, nor could he make her commit suicide.
In an instant, Muzan became wary of Kaito.
This man was far too mysterious!
Not only had he appeared behind him effortlessly, but he had also captured Nakime without anyone noticing and put her in this state.
Consider this Western-style mansion. There was an Upper Rank Demon and two Lower Rank Demons on standby here.
And yet?
None of them had noticed anything!!!
Honestly, for a moment, Muzan wanted to kill them, but then he realized that since even he hadn't reacted, they couldn't have either.
All he could say was...
The opponent was not only eerie but also immensely powerful!
Even though Kaito wasn't carrying a Nichirin Blade, wearing only seemingly ordinary clothes, Muzan still began to feel fear.
The more ordinary such a person seemed, the more Muzan found it unreasonable!
"Hahaha, don't be scared, don't be scared. Although I'd really like to drag you out for some sunbathing, I feel that wouldn't be very interesting."
"So..."
"Here's a bowl of soup I got from someone (Shinobu). How about a couple of sips?"
'Hahaha!'
'Here comes the chicken soup~'
Kaito pulled a large bowl from the golden ripple and floated it in front of Muzan.
Aside from being shocked by Kaito's methods, upon seeing what was in the large bowl, Muzan's veins immediately bulged!
"Come on, drink up~"
"Drinking chicken soup is such a wonderful thing, isn't it?"
Rather than chicken soup, it was actually wisteria soup.
For Demons, this was an absolute tonic... oh no, it was the number one poison!
An ordinary Demon would die on the spot just by drinking it!
But for stronger Demons...
Consider Shinobu injecting herself with a large amount of wisteria poison. When Doma devoured Shinobu, the poison activated, but he still managed to fight for quite a while after that...
In such a scenario, the stronger the Demon, the weaker the effect of wisteria.
Unless the dose was massive.
This bowl of wisteria soup Kaito had probably wouldn't kill him. But it could certainly make Muzan miserable for a long time, even weakening him for a while.
After all, even if he wasn't going to kill him, he could at least annoy him, right?
Otherwise, why would he have bothered coming to see him?
If he had to blame someone, blame it on the fact that he happened to be by Nakime's side~
As for the final blow, that would be left to Tanjiro.
Tanjiro's family was nearly annihilated because of him, so it was only fitting that Tanjiro personally slay his enemy. Even if it hadn't happened in this world, it had in other parallel worlds.
"Oh? Why aren't you drinking? Come on, drink up~"
When the soup was placed before him and he didn't drink, Kaito simply shoved it in front of his mouth.
At this point, Muzan finally stopped pretending. He summoned all the Demons in the mansion and those nearby. A bang erupted from his back, and several disgusting tentacles emerged.
Unfortunately, the gap in strength between Muzan and Kaito was simply too vast.
Before he could do anything more, Kaito gave a cold smile and unleashed a terrifying aura.
The entire Western-style mansion was suppressed by Conqueror's Haki and began to crumble.
Under such circumstances, those Demons coming to help?
No way!
Even the Demon King, Muzan, was directly forced to his knees!
"I'm offering you a drink, and you dare to resist?"
"Are you trying to make me angry?"
A hand formed from magical power gripped Muzan's throat and implanted a marker in his body. Another hand formed from magical power grabbed the bowl of wisteria soup and shoved it into his mouth.
He would drink whether he liked it or not. At the very least, Kaito wanted to fulfill his own desire from back then.
Back when he was watching the story, he had really wanted to force-feed Muzan wisteria soup!
"Ughhh——"
Force-fed the wisteria soup, Muzan struggled even with his throat constricted, but the magical power forced it down.
And so, one gulp after another.
Only after the entire large bowl of wisteria soup was emptied did Kaito release him.
"Ugh, ah—"
The moment he was released, Muzan's body erupted with countless bulging veins. As his muscles swelled and his clothes tore, his body and face became twisted and contorted. His eyes filled with blood, seemingly about to pop out.
Fortunately, the amount of wisteria soup Kaito had given him wasn't too much. It would only cause severe pain and nausea, and temporarily weaken him slightly.
If he wanted to kill him, he would probably need another ten large bowls.
"Well, seeing you so 'happy', my purpose for this visit is accomplished."
Kaito clapped his hands, looking at Muzan writhing on the ground and twitching. Chuckling, he grabbed Nakime and left.
As for what happened to Muzan afterward, Kaito didn't care. He would certainly be in agony for a long time.
And as for whether he would hide again, there was no need to worry.
Kaito had already placed a mark on him. Later, he could give the Demon Slayer Corps an item to track this mark, allowing them to find him anytime.
"Alright, now it's your turn."
Knowing Nakime would die if exposed to sunlight, Kaito wrapped her in rock and placed her outside the town.
Now, he would test the waters with a B-Class Plunder Card.
"Oh? Can't plunder?"
Following the method to plunder Nakime's Blood Demon Art, he received feedback that it couldn't be done. Helpless, Kaito took out an A-Class Plunder Card.
"Well, it seems Nakime's Blood Demon Art is A-Class. Maybe even close to S-Class."
The A-Class Ability Plunder Card activated. After Nakime's Blood Demon Art was completely stripped away, the Plunder Card returned to Kaito's hand.
"Done!"
"Hehehe, time to go back~"