Demon Slayer: Great Swordmaster System at the Start, My Master is Tsugikuni

All the swordsmanship and Breathing Techniques of Tsugikuni Yoriichi's life were condensed within this booklet.

This was a book capable of driving both humans and demons to madness.

"Have you finished reading?"

The voice returned to its calm tone as Yoriichi spoke unhurriedly.

"If you're done, I'll now demonstrate the Twelve Forms of swordsmanship within."

The Sun Breathing personally demonstrated by Tsugikuni Yoriichi himself!

Feeling his breath grow rapid, his blood flow seeming to quicken, the Scribe nodded.

The next moment, Tsugikuni Yoriichi drew his blade.

The sharp edge gleamed under the sunlight, radiating a cold, murderous stillness.

A black-and-crimson Sun Flame Blade, with a single character—'Annihilate'—carved at its base.

The heavens and earth seemed to lose their color as an indescribable aura erupted from Tsugikuni Yoriichi.

Forgetting the sweat beading on his forehead, the Scribe stared fixedly at Yoriichi, afraid of missing even the slightest detail.

Sun Breathing * First Form * Dance

Sun Breathing * Second Form * Azure Sky

Sun Breathing * Eleventh Form * Halo Dragon Dance

Sun Breathing * Twelfth Form * Flame Dance

Except for the yet-unfinished Thirteenth Form, every other form of Sun Breathing was flawlessly displayed by Tsugikuni Yoriichi.

Over and over, tirelessly, he executed the Sun Breathing.

From the sun rising high to its setting in the west, from morning dew to the embers of dusk.

By the time the Scribe came to his senses, Tsugikuni Yoriichi was already gone.

Only the traces left on the ground bore witness that Yoriichi had been there.

Sun Breathing was truly no mortal technique.

The Divine Sword Skill replayed in his mind again and again, and the Scribe left with a heart full of reverence.

After dinner, under the glow of lamplight, he opened the booklet.

Though he had already memorized Yoriichi's swordsmanship, without mastering the Breathing Technique, he could not use it perfectly.

To grow stronger, the Breathing Technique was the best shortcut!

On the first page of the Breathing Technique, the principle was clearly written.

The so-called Breathing Technique was to expand the lungs as much as possible, strengthening the heart and lungs, allowing the blood to obtain more oxygen in a short time.

Even beneath this single short sentence, Yoriichi's explanations were written.

It was clear just how much of his effort had been poured into this booklet.

Then, let's begin!

Taking a deep breath, the Scribe started learning according to the method in the booklet.

Breathe in~ breathe out, breathe in~ breathe out, breathe in~ breathe out

As time passed, the moon replaced the sun, hanging high in the sky.

Sunrise and sunset, the moon's appearance and disappearance.

Unknowingly, an entire day had passed.

Immersed in the Breathing Technique, the Scribe felt no passage of time at all.

Aside from the slow sound of breathing, the small room was nearly silent.

Sinking into the world of the Breathing Technique, a series of sounds rang out in the Scribe's mind.

Congratulations, host. You have acquired the skill: Basic-Level Sun Breathing (0/1000).

Affected by the host's own abilities, Sun Breathing techniques have been unlocked.

Skill acquired: Sun Breathing * First Form * Dance

Skill acquired: Sun Breathing * Second Form * Azure Sky

Skill acquired: Sun Breathing * Third Form * Crimson Sun Mirror

Skill acquired: Sun Breathing * Twelfth Form * Flame Dance

Sun Breathing * Thirteenth Form not unlocked.

Congratulations, host. By relying on your own ability to learn Sun Breathing, you have earned 4000 points.

Combined with the host's own abilities, Basic-Level Sun Breathing (0/1000) has been upgraded to Novice-Level Sun Breathing (4000/10000).

Unknowingly, the Scribe had already learned Sun Breathing.

Coupled with the system's reward, his Sun Breathing had even skipped past the Basic level, reaching the Novice level.

But that wasn't all. Immersed in the Breathing Technique, the Scribe was still growing stronger.

Time passed again, and the Scribe's body fell into sleep.

Even so, he continued to maintain the use of the Breathing Technique.

Air flowed through his nasal passages, and the muscles in his body began to move in a rhythmic motion.

His entire body was like a massive factory, starting to work in unison.

The swelling on his wrists and the bruises on his body began to slowly fade, and the soreness left behind by the battle started to recede.

Even those subtle aftereffects vanished under the influence of this Breathing Technique.

Being able to continue using the Breathing Technique even while asleep—this was unmistakably a higher level.

Total Concentration Breathing!

Influenced by the host's own abilities, the Breathing Technique advanced to Total Concentration Breathing.

Congratulations to the host for mastering Total Concentration Breathing through personal effort. You have been awarded 5,000 points.

Combined with the host's existing abilities, Novice-level Total Concentration * Sun Breathing (4000/10000) has advanced to Novice-level Total Concentration * Sun Breathing (9000/10000).

In just a few short days, the Scribe had learned Sun Breathing.

Not only that, but he had also successfully mastered Total Concentration Breathing!

After the starry sky hung high, a blazing sun appeared.

His eyelids twitched, and the Scribe slowly opened his eyes.

Chapter 5: Shocked Academy, Are You Even Human?

Rubbing his eyes, the Scribe saw that it was already daytime outside.

Was I just asleep?

Recalling what had happened, the Scribe realized he had unknowingly mastered Total Concentration Breathing.

Because it was mentioned in the little booklet Yoriichi had given him.

Those who mastered Total Concentration Breathing would subconsciously use the Breathing Technique even while sleeping.

It felt... truly different from before.

Though he had only just learned Sun Breathing, the Scribe's body had already undergone earth-shattering changes.

He was brimming with energy, as if he possessed boundless strength.

His muscles were firmer, his gaze sharper, and his breathing smoother and easier.

The Scribe had taken another solid step toward becoming the strongest in the world.

Walking to the training ground, he began his daily exercises.

Swinging his blade, punching sandbags, running, pushing boulders...

A few hours later, the Scribe had run through every single training item.

He simply clenched his fist and shook his head in slight disappointment.

With the rise in his own strength, these exercises could no longer provide him with higher-level benefits.

After spending so much time training, he hadn't felt even a trace of fatigue.

Just as he was pondering what method to use for training next, a scattered crowd in the distance caught his attention.

Following the direction of the crowd, he saw they were all gathering in a plaza.

That place... if I remember correctly?

Carrying his doubts, the Scribe stopped a girl who was heading toward the plaza.

The girl looked about ten years old, with faint freckles on her face and a ponytail on each side of her head.

As if she had just woken up, her eyes were still a bit dazed and unfocused.

"Miss, may I ask why everyone is gathering in that plaza?"

Already in a bad mood from being woken up, the girl's temper flared the moment someone stopped her.

Just as she was about to teach the guy who blocked her a lesson, she turned around and saw the smiling Scribe.

Handsome and polite, he instantly captured her attention, and her anger was thrown into the Atlantic Ocean.

Unlike his master, the Scribe was not a cold person.

In just a few words, he learned everything he wanted to know from the girl named Kaori.

Just as he had thought, the plaza was set aside specifically for explaining Breathing Techniques.

Normally, swordsmen who had studied Breathing Techniques for a few years would do the teaching.

But today, the plaza welcomed a Pillar of the Demon Slayer Corps.

The current Flame Pillar, Rengoku Kyojuro!

It was precisely because of the Flame Pillar's arrival that children like Kaori, who hadn't yet reached the required age, had the chance to be exposed to Breathing Techniques early.

You see, ordinary members had to reach at least twelve years old before they could even come into contact with a Breathing Technique.

The Flame Pillar himself was coming to teach Breathing Techniques? That didn't sound half bad.

It was a good chance to hear what others thought about Breathing Techniques—no harm in listening in.

Following the crowd, the Scribe walked into the plaza.

He found a secluded spot to sit down, then began observing his surroundings.

Standing right in the center of the plaza was a young man in his twenties.

He had long hair streaked with yellow and red, and beneath his sharp, sword-like brows were bright, spirited eyes.

The corners of his mouth were slightly raised, making it obvious at a glance that he was a passionate, fiery sort of person.

This was the current Flame Pillar, Rengoku Kyojuro!

After a brief look at the man's features, the Scribe couldn't help but marvel at the strength of the Rengoku family's genes.

Whether it was Kyojuro, or Rengoku Shinjuro and Rengoku KyoJuro from several hundred years later, or even Rengoku Senjuro, who had no talent for swordsmanship—

You couldn't say this family's faces were completely unrelated; you could only say they were exactly the same.

Seeing that the plaza was mostly full, Kyojuro cleared his throat and called out loudly.

"Everyone, thank you all for coming to my Breathing Technique lecture today."

"Without further ado, let's begin!"

"First, I'd like to ask you all: what exactly is the principle behind Breathing Techniques?"

Faced with the Flame Pillar's question, everyone present, without exception, began to think seriously.