Demon Slayer: Starting with the Great Swordmaster System, My Master Tsugikuni

Who was Tsugikuni Iwashiro waiting for? Could it be Master Yoriichi?

In Scribe's mind, Yoriichi was likely the only person worth Iwashiro going to such lengths to wait for.

But as time passed, Scribe abandoned that thought.

A far more terrifying possibility emerged in his mind.

Tsugikuni Iwashiro was waiting for Kibutsuji Muzan!

Just as Scribe pondered whether he should act and drive away Iwashiro or Kibutsuji Muzan, a scream rang out from the brothel in the distance.

Immediately afterward, a figure flew out from one of the upper floors and crashed straight into the ground.

With a dull impact, a huge pit appeared in the ground.

Under the moonlight, Scribe clearly saw the corpse whose chest had been split open.

It was the man who had been with Muzan earlier!

The corpse that had fallen from the upper floor was quickly discovered. The humans near the brothel cried out in alarm, their faces filled with terror.

At the same time, a figure leaped from the floor where the body had fallen and landed directly on the rooftop.

Kibutsuji Muzan.

Muzan had now returned to his male appearance. He wore loose black silk garments, his hair falling slightly past his ears and fluttering in the night wind.

In his left hand, he held a bloody heart.

After wolfing down the heart in a few bites, Muzan wiped the blood from the corner of his mouth.

The heart of a wealthy human merchant was truly disgusting.

I had him search for something for so long without any results, and he still dared to lay his hands on me.

The crimson blood mingling with his pale face made his expression look all the more ferocious and terrifying.

You waited all this time just to find me, didn't you?

After wiping his hands clean with a handkerchief, Muzan called out to Iwashiro in the distance.

Now, we can have a proper talk.

The night wind swept by, carrying the bloodstained handkerchief into the distance.

With a single leap, Iwashiro landed on the other side of the roof.

Beside them, Scribe lowered his breathing as much as possible and silently listened to their conversation.

After a while, he finally understood why Tsugikuni Iwashiro and Muzan had both appeared in this place.

After leaving the Demon Slayer Corps, Tsugikuni Iwashiro had wandered about out of boredom for a time.

That continued until more than ten days ago.

He had originally intended to resupply at a village, but there he discovered the corpses of the entire village, along with dozens of Demon Slayer Corps Swordsmen.

There, he had also sensed an unfamiliar yet extraordinarily powerful aura.

Out of curiosity, he began tracking that aura.

Before this, Iwashiro had encountered all sorts of situations.

Powerful demons tried to devour him, only to be slain.

Roving bandits tried to rob him, only to lose their heads.

Famous samurai blocked his path, only to be defeated.

In the end, he arrived in this town and quietly waited for the owner of that aura to appear.

And now, Kibutsuji Muzan had finally appeared before him.

I originally thought you were like those little brats who use Breathing, but it seems you truly are different.

Those little toys I left behind could not affect you in the slightest.

Clapping his hands, Muzan did not hesitate to praise Iwashiro.

In his centuries of life, this was the first time he had encountered a human with such talent.

So what? My life is already running out. In this lifetime, I have no hope of reaching the pinnacle of swordsmanship.

After hearing Iwashiro's complaint about his dwindling lifespan, Muzan suddenly curled his lips into a smile.

He extended a hand, his words brimming with temptation.

Then why not become a demon?

A look of shock appeared on Tsugikuni Iwashiro's face, as though Muzan's idea had startled him.

As long as you become a demon, you can possess endless years.

You seek the ultimate sword techniques, while I want to see what happens when a swordsman who uses Breathing becomes a demon.

You are different from other swordsmen. You have the right to choose.

After hearing Muzan's words, Tsugikuni Iwashiro began to tremble slightly.

Just as he had said, once he chose to become a demon, he would never have to worry about his lifespan again.

By then, he would have ample time to hone his swordsmanship, ample time to surpass Yoriichi!

In an instant, an emotion called desire surged from the depths of Iwashiro's heart and coursed through his entire body.

If he made the right choice, he could fulfill his long-cherished wish.

Well?

Watching Iwashiro silently, Muzan waited for him to make his choice.

In the end, his desire to surpass Yoriichi overcame everything else.

Dropping to one knee, Iwashiro paid Muzan the respects of a retainer greeting his lord.

You made the right choice.

Walking up to Iwashiro, Muzan slowly sliced open his palm.

Drink this blood. As long as you survive it, you can become a powerful demon!

Without the slightest hesitation, Iwashiro drained the blood pooled in his palms in one gulp.

The next moment, Tsugikuni Iwashiro's transformation into a demon began.

Kokushibo Is Born, Their Whereabouts Exposed

"Gahhh!"

Clutching his chest, Tsugikuni Iwashiro let out a roar.

Veins bulged across his forehead, face, and body.

It was as though insects were wriggling through his blood vessels, making them twitch faintly.

His body curled into a ball, and sweat had already soaked the rooftop beneath him.

The stronger a human was, the longer it took for them to transform into a demon.

With a casual strike, Muzan shattered the roof beneath Iwashiro. He seemed to care greatly about Iwashiro's transformation.

I wonder how long yours will take.

After settling Tsugikuni Iwashiro in place, Muzan leapt down to the ground.

Just as the humans below stood frozen in confusion, panicking over why someone had jumped down from midair, Muzan made his move.

Swish! Swish! Swish!

At a speed too fast for the naked eye to see, Muzan slashed several humans across the neck and held out one hand.

You have five seconds to run.

As soon as he spoke, his thumb folded into his palm.

The humans whose necks had been cut collapsed to the ground, their bodies trembling uncontrollably.

The nails on their hands and feet began to lengthen, and their pupils turned blood-red.

Their violent trembling ceased. Fangs protruded from their mouths, and strands of saliva dribbled from the corners of their lips.

They rose from the ground again and turned their gazes toward the people around them.

With a roar, the former humans who had been transformed into demons launched themselves at the surrounding people, tearing and biting into them.

At that moment, the humans who had still been somewhat confused finally understood what was happening.

Crying out in terror, they fled toward the outskirts of town.

Raising his index finger to his lips, Muzan made a shushing gesture.

Let this town become a gift for the demon about to be born.

Taking it all in, Scribe's right hand tightened around his sword hilt until his knuckles turned pale.

The reason he did not act was not because he feared Muzan, nor for any other reason.

It was because he was waiting.

Waiting for an opportunity to kill the demonized Tsugikuni Iwashiro.

Certainly, if he acted now, he could save a few people, a dozen people, perhaps even dozens of people.

But so what? Over the next several centuries, countless humans would die at the hands of demons.

If he could eliminate Tsugikuni Iwashiro here, then he would truly be removing a future threat.

Gritting his teeth, Scribe chose to continue enduring.

After killing several people and creating a few more demons, Muzan returned here.

It was obvious that he was eagerly anticipating Tsugikuni Iwashiro's transformation.

So much so that Muzan was willing to guard him personally and remain by his side the entire time.

Soon, three days passed.

When night fell, Muzan, who had been sitting atop a building, suddenly stood up.

A demon that took three days to complete its transformation... truly something to look forward to.

The moment he finished speaking, a terrifying aura shot into the sky.

Cold desolation, death, terror, chaos.

Amid faint sounds of slashing, a shadow slowly emerged from the building.

The instant he stepped out, fine cracks suddenly spread across the walls.

Crack, crack.

The towering building had been sliced into countless equal-sized pieces.

Beneath the moonlight, the fully transformed demon Tsugikuni Iwashiro revealed his appearance.

He still wore his black hair in a high ponytail, and the Demon Slayer Marks on his left forehead and from his right chin down to his neck had remained.

The only difference was the six eyes on his face!

Their sockets were crimson, their irises yellow, with fine lines etched across them.

Looking at Tsugikuni Iwashiro before him, Muzan smiled and said.