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

Nothing that happened in the blood-red realm could escape Yuko's senses, including the swordsman stepping onto the battlefield with the potion.

Yuuko was very familiar with that medicine; it was the same human-transforming drug she had injected into Nezuko before.

Because Muzan had been injected with a drug that turned him into a human before, Yuuko easily guessed Tamayo's plan.

In that case, she would have to ensure that Muzan wouldn't have any extra energy to break down the toxins.

"Is it that woman Tamayo's poison again?" Muzan, surrounded by blood, also heard Tanjiro's words, which made him grit his teeth and feel angry at Ikuko's words.

It's really a waste of money.

Unexpectedly, this woman was so cautious. Even after he had shown such weakness, she didn't have the urge to step forward.

Not only did he fail to find an opportunity to devour the woman, his situation became increasingly precarious.

Muzan began to believe in this woman; she truly could go for hundreds of years without eating flesh and blood, and he also believed that this woman was different from 'demons'.

She truly has the ability to overcome her inner desires.

Muzan did not stop suppressing his regenerative abilities just because Ikuko was cautious.

Isn't there still a little devil here?

Judging from what she just said, this woman probably intends to restrain him from the side and leave the task of injecting the poison to this brat.

If we could eat the flesh and blood of this brat, it would be a decent supplement.

The swordsman of the Sun Breathing technique, he hasn't tasted it yet.

Time passed by, and the sun shone even brighter, hanging high in the sky.

Muzan had long since lost the means to resist, and exhausted, he had been beaten to the ground by the repeated attacks.

His back was covered with numerous wounds, the blood blurring the extent of his injuries.

Only the flesh on his back could be faintly seen slowly wriggling, seemingly showing signs of healing.

For a human, this healing speed would be nothing short of miraculous, but for a demon known for its regenerative abilities, it is nothing short of stagnation.

If even such a minor injury cannot be healed immediately, one can imagine Muzan's current physical condition.

Yuko wiped the cold sweat from her forehead. Her strength was almost completely depleted. Muzan's condition couldn't be better than hers; they were probably about the same.

Yuko stared at Muzan's motionless figure and called out, "Tanjiro."

"Understood." After receiving Yuko's order, Tanjiro, who had been waiting for a long time, took the medicine and went up.

Yuko added a word of caution: "Be careful."

"Hmm." Tanjiro nodded solemnly, his clear vision appearing before him. He would immediately retreat if Muzan made the slightest move.

Tanjiro cautiously walked toward Muzan, who was lying in a pool of blood.

Yuko waved her hand, and a surge of blood appeared, as if countless hands were wrapping around Muzan's body and pressing him down.

Muzan: "..."

He's had enough!

That damn woman!

Tanjiro approached Muzan, took out a potion, and prepared to inject him in the back.

He watched Muzan's movements with suspicion, but his clear vision revealed nothing unusual.

Just as Tanjiro bent down, Muzan's back muscles suddenly changed, and a long slit suddenly appeared on his bloodied back, running from the back of his neck to his lumbar spine.

The moment the gap opened, it was immediately filled with a dense array of teeth, making Tanjiro's back tingle with dread.

It wasn't just a simple split in the back; as the giant mouth opened, the collarbone on the back seemed to detach from the body, dragging all the flesh and blood out, attempting to swallow Tanjiro whole.

Yuko's Blood Demon Art, which she used to restrict his movements, was easily broken through, clearly indicating that this attack was something Muzan had prepared meticulously for a long time.

Upon noticing the unusual appearance on Muzan's back, Tanjiro quickly retreated.

Muzan's entire body was pulled upright, and the gaping maw on his back resembled a giant scallop, about to devour its prey.

Tanjiro stopped himself from retreating and threw the potion in his hand into the gaping maw.

The three vials flew into Muzan's body. Before Tanjiro could show a joyful expression, a giant claw emerged from his enormous mouth and pulled the vials out. The giant claw seemed to be tightening its grip.

Tanjiro's pupils trembled.

Oh no! The medicine is going to be ruined!

He messed up!

Just as he instinctively tried to rush forward and use his body to block the giant claw's teeth, a gust of wind came from behind.

With one hand on Tanjiro, Yuko kicked the giant claw away, sending it and the shattered medicine flying.

Yuko turned around again, and with her Nichirin Blade held in reverse, she stabbed it into both sides of Muzan's scallop shell from the side, preventing him from opening his mouth.

Muzan tried to struggle, but Yuko kicked him directly, slamming him back to the ground.

They stomped on him firmly, and the blade of the Shura Blade pierced through Muzan's back, pinning him to the ground.

Yuko gripped the hilt of her sword, channeling all her strength to pin Muzan to the ground, and coldly said, "Muzan, this is where you will die."

She was quite certain that Muzan's struggle just now was his last.

The human-transforming drug successfully entered Muzan's body. At first, Muzan was somewhat panicked, thinking it was some kind of vicious poison, but after contact, he quickly understood what it was.

He had previously broken down this toxin, and given some time, he could quickly break it down completely.

Muzan struggled to get up, but his ugly posture could not extinguish his desire to survive.

but……

but……

I'm running out of energy...

Muzan, immersed in blood, stared blankly ahead.

So that's what those two women were planning.

By depleting his physical strength, he loses his ability to break down toxins.

He was forced to revert to human form, a transformation he could not resist.

In this way, even a ghost that has overcome sunlight will be destroyed.

As he realized the drug was taking effect in his body, and that he had completely lost the strength to break it down, tears slowly streamed down Muzan's face.

I'm so unwilling... so incredibly unwilling... He had already overcome the sunlight, so why was he still killed...?

Why is the world always so unfair to him?

He was predicted to die young from birth, but all he wanted was to live in this world.

Only Muzan himself knew the extent of his resentment.

Even if Yuko found out, she wouldn't show him any pity.

They only have themselves to blame.

Under the influence of the indigestible drug, the human-transforming drug ignored Muzan's will and forcibly turned his body back into a human.

This process was slow, so slow that Muzan could clearly feel his own pain.

"Ah~" A heart-wrenching pain instantly spread throughout her body.

It's not just the scars caused by Yuko, but also the damage the deformity inflicted on the body.

There couldn't possibly be such a deformed monster in this world.

The pain was even greater than Muzan's greatest fears, the cinnabar blade and the sun.