Demon Slayer: The Journey That Began When I Became Yoriichi's Sister

Chapter 406 Muzan Loses His Weakness



Chapter 406 Muzan Loses His Weakness

Muzan didn't lose interest because of Yuko's indifference; he really wanted to see the woman's regretful expression.

"I was able to overcome the sun because of... you~"

Yuko bit her lip lightly. To be honest, she felt the same way herself, even without Muzan's explanation.

There's no reason needed; you can overcome the sunlight simply through willpower.

That's a different concept from opening up the markings and the transparent realm.

Just as it's difficult for someone to solve a math problem they don't know how to do when they're angry, it's like expecting your condition to gradually improve without taking medicine.

If the inability to face the sun is considered an illness, then the blue spider lily is the cure for this illness. Without the blue spider lily as a cure, the probability of recovering from this illness through one's own willpower is almost zero.

This is still a conservative estimate; in fact, the possibility is practically zero.

Yuko realized that it might be because of some of her mistakes that Muzan was able to overcome sunlight, but she had long forgotten the sword she left behind in the sword-forging village.

She even wondered if Muzan had absorbed too much of her blood, which was why she was in this situation.

But Muzan's next words completely shattered her idea.

"Do you remember? The demon blade you lost in the Infinity Castle in the village of swordsmiths?" Muzan was pleased to see Yuuko's regretful expression and revealed the reason without any attempt to hide it.

As expected, Yuko's eyes narrowed sharply.

When Muzan mentioned it, she remembered that when Kokushibo dragged her into the Infinity Castle, her demon blade, made of flesh and bone, did indeed fall into the Infinity Castle.

That demon blade was made from the humerus, radius, and ulna of her arm—that is, the size of an entire arm.

Perhaps the quantity was too small, or perhaps she simply couldn't recall it at the time, which is why Yuko only remembered it now when Muzan brought it up.

It was only the size of an arm... No, before that, Muzan probably hadn't been able to overcome the sunlight, otherwise his actions would have been too strange, and that look of fear didn't seem like an act.

There's no reason to put on airs like that.

Regardless, his own arm played a decisive role, giving Muzan the possibility of evolving again and ultimately helping him overcome sunlight.

"Do you understand now? It's all your fault~" Muzan coldly pointed a finger at Yuuko, "If it weren't for you, I might have been wiped out."

Before Ikuko could respond, Tanjiro angrily retorted, "No! It's not Ikuko's fault!"

Yuko did not respond to them.

Seeing this, Muzan narrowed his eyes slightly.

The next moment, his figure appeared in front of Yuko, his long, tentacle-like whips resembling open flower buds, about to envelop Yuko.

He hadn't forgotten who was the most delicious person here.

Tanjiro's expression changed, and cold sweat broke out on his back. In that instant, he rushed out, trying to stop Muzan's actions.

Muzan paused, not because of Tanjiro, but because...

Yuko leaned back, placed her Nichirin Blade in front of her abdomen, and pierced straight through Muzan's body.

But the crimson blade was no longer able to exert any further restraint on Muzan.

Yuko raised her head, her golden eyes meeting Muzan's crimson eyes: "If you think I'm some kind of idiot who can be easily defeated, you're underestimating me."

"Is that so? But what can you do now?" Muzan's crimson eyes were calm as he reached out and grabbed the blade of the Nichirin Blade, wrestling with Yuuko to slowly pull the Nichirin Blade out of his body.

It seems he still has the upper hand in terms of remaining physical strength.

After all, he had at least had a hearty meal late at night.

Muzan wanted to continue pursuing Yuko, but was attacked from behind by Tanjiro and Zenitsu, forcing him to part ways.

It's such an eyesore.

"Insects should make a proper exit." Muzan turned around with a cold look in his eyes, and several fleshy whips slashed horizontally towards the two of them.

Tanjiro and Zenitsu jumped up and slid in to avoid the attack of the flesh whip, and then slashed at Muzan in unison.

Muzan frowned, and the fleshy whip he had been wielding suddenly changed direction, attacking the two of them from behind.

Tanjiro and Zenitsu didn't even turn around; the approaching flesh whip behind them was slashed down by two sharp blades.

Giyu Tomioka and Muichiro Tokito appeared and attacked Muzan right behind them.

Muzan was about to retreat when Ikuko blocked his position from behind once again.

There was no way to retreat, either forward or backward.

but……

A fierce white light suddenly appeared from the huge teeth on Muzan's body.

That shockwave!

These words came to everyone's mind, and they all stopped moving forward, protecting themselves as they retreated.

Only Yuuko did not retreat, and her Nichirin Blade pierced through Muzan's head once again.

The Nichirin Blade pierced through Muzan's forehead, but his expression remained unchanged: "Useless."

After a buzzing sound, a transparent shockwave once again emanated from Muzan, pushing everything around it outwards.

The crystal beneath Yuko's feet cracked, but she managed to withstand the attack thanks to the strength of her physical body, though blood oozed from her face.

She didn't stop what she was doing. In the blink of an eye, a series of sharp and fluid sword movements were completed, severing all of Muzan's vital organs, from head to lower body, including his five brains and seven hearts.

Yuko stared intently for a long time before retreating without hesitation.

Yuko frowned as she watched Muzan's external injuries rapidly heal.

It really didn't work.

Yuko had anticipated this, but she was unwilling to give up the opportunity and wanted to give it a try.

The five brains and seven hearts, which were originally considered weaknesses, are no longer weaknesses.

No, that shouldn't really be considered a weakness. To be precise, the five brains and seven hearts were created by Muzan to protect the weakness of his neck.

As long as Muzan's five brains and seven hearts are not severed by the Nichirin Blade, he can move around quickly even after his neck is cut off.

After all, attacking one weakness is not as difficult as attacking twelve weaknesses at the same time.

Now, these five brains and seven hearts have lost their reason for existence as a protective structure.

Under the watchful eyes of Yuuko and Tanjiro's penetrating vision, Muzan's shattered brain and heart did not regenerate. Instead, they transformed into flesh and blood and merged into his body, leaving only his brain and heart intact.

The weakness has disappeared.

"I told you, I am already the perfect ultimate life form. Everything you have done is in vain." Muzan spread his arms, exposing his chest, as if indicating that he wanted to stab him there.

Muzan, who could regenerate with just a few cells left, couldn't imagine how he could be destroyed.


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