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

"Huh? They're all still alive?" The demon slowly approached. "And completely unharmed."

"I will definitely become stronger after eating you all."

"Be careful not to break your teeth." Yu Zi spat out a mouthful of blood and gripped her katana tightly.

Yan Sheng suppressed the blood and froth rising from his throat and tried to get up, leaning on his knife.

The demon licked its lips: "It's decided. I'm going to start eating you from your legs, so you'll experience firsthand the reality of being eaten."

Yuko felt a bit disgusted and said with disdain, "Foot fetish? Are you a pervert?"

Yuko tried her best to regulate her emotions and alleviate the fear in her heart.

She thought that as a transmigrator, she wouldn't be afraid of such a creature that she had seen countless times in anime, but when that ugly humanoid form was actually displayed in front of her, Yuko felt uncomfortable and fearful from the bottom of her heart.

The demon's forehead veins bulged; he didn't quite understand, but he was enraged.

When the evil spirit attacked with inhuman speed, Yuko had only one thought in her mind.

Hey!

If I had known she would insist on switching places in mid-air, I would have let Iwakatsu take the lead.

Suddenly, a gentle breeze seemed to blow away the dark clouds and ruffle a strand of Yuko's hair.

Under the full moon, a crimson figure descended from the sky.

Holding a blade that gleamed brightly under the full moon, he entered their eyes with a godlike presence.

The demon's head had long since vanished without a trace, and its body, lying before the two, was rapidly disintegrating.

No one saw his movements clearly.

More than a decade later, Yoriichi Tsugikuni reappeared before the two.

Yuko breathed a sigh of relief and waved happily at him: "Yoichi~ Long time no see."

Despite not having met for ten years, the three of them look almost identical.

Especially the twins, Iwakatsu and Yoriichi, are indistinguishable except for the freckles on their faces.

Iwakatsu's face had a gentler and calmer look, just like Yoriichi's.

Adding a touch of charm and gentleness to Yoriichi's face creates Ikuko's face.

The only significant difference between the three is their height.

Yuko, who is only 1.7 meters tall, is nearly 20 centimeters shorter than her two older brothers, Iwakatsu, who is 1.9 meters tall.

Even Yuko's height is quite tall by today's standards, not to mention the Tsugikuni brothers, who are like little giants standing in a crowd.

Yuan Yi smiled slightly and knelt down in front of her brother, Yan Sheng.

"I'm sorry, elder brother, I'm late."

Yoriichi felt apologetic for not being able to save his brother's men.

Yan Sheng simply leaned against the tree trunk and watched his younger brother quietly. The flame of jealousy that he had almost forgotten deep in his heart rekindled in his pupils.

Years later, the gap between them has widened even further.

While he was basking in the glory of becoming a samurai, Yoriichi was already capable of easily severing the heads of demons.

Through Yorimitsu's words, they learned the truth that evil spirits exist in this world.

Both of them sustained injuries of varying degrees.

After giving them a quick first aid, Yoriichi took them to the Demon Slayer Corps' residence for treatment.

Throughout the entire process, Iwakatsu rarely spoke, while Ikuko occasionally interacted with Yoriichi.

Yu Zi remarked with admiration, "Your communication skills have improved significantly compared to before."

Yoriichi smiled gently: "Yuko, you haven't changed at all. You're still as lively as ever."

Yu Zi patted his shoulder: "I'll take that as a compliment."

Yoriichi took the two to the Demon Slayer Corps for resettlement. At this time, the Demon Slayer Corps was not as secretive as it would be in later years.

Lying in the hospital bed, Yuko began to have wild thoughts.

If nothing unexpected happens, the plot should now be aligned.

She didn't watch much Demon Slayer, just finished the first season, plus some other popular content she occasionally came across online.

In reality, my understanding of the overall plot of Demon Slayer is fragmented and pieced together.

It's the kind of situation where if you join a Demon Slayer discussion group, you'll be questioned and kicked out within three to five sentences.

However, barring any unforeseen circumstances, Kokushiro will soon join the Demon Slayer Corps and will be too busy with family matters, so she can take the opportunity to join the Demon Slayer Corps as well.

Then he learned the Sun and Moon Breathing Technique from the two older brothers, and from then on, he reached the pinnacle of life and became Muzan's new father.

Think a little excited.

As for what will happen to the successor state after losing its head...

Yuko could only say that she was barely able to take care of herself and had no time to worry about anything else.

After Akeno passed away and Yoriichi left, that home no longer brought her much warmth.

Sure enough, after recovering from his injuries, Kokushima told Yoriichi about his desire to join the Demon Slayer Corps.

Taking this opportunity, Yuko raised her hand and seconded, "I also want to join the Demon Slayer Corps."

Iwakatsu glanced at her indifferently, making Yuko feel uneasy.

If Kokushi disagrees, then wouldn't Yoriichi, his younger brother, have to listen to him?

Fortunately, he eventually looked away and didn't say anything more.

Yu Zi breathed a sigh of relief; finally, she wouldn't have to get married.

Yoriichi was unaware of the family's situation and simply took it as support from his older brother and younger sister.

He then became the recommender for the two to join the Demon Slayer Corps.

From then on, Yuko's life, which she had experienced for sixteen years since her transmigration, finally got on the right track.

It was only after joining the Demon Slayer Corps that Iwakatsu learned about his younger brother's strength from others.

Before Yoriichi arrived, the Demon Slayer Corps swordsmen relied entirely on their swordsmanship with Nichirin Blades to fight demons, resulting in an alarmingly high mortality rate.

After Yoriichi arrived, he not only created the initial breathing technique—Sun Breathing.

Furthermore, because others could not control it, he used this as a basis to teach everyone to create breathing techniques suitable for them, namely the five major breathing techniques of rock, lightning, wind, water, and fire.

It increased the efficiency of killing demons and greatly reduced the casualty rate of the Demon Slayer Corps.

It can be said that Yoriichi's arrival paved the way for the future of the Demon Slayer Corps.

Yoriichi was never stingy with his teachings on breathing techniques.

As the older brother and younger sister, they received his personal guidance.

The two men stood in an open space, holding practice swords, their eyes closed.

"Sigh~"

A faint orange-red breath escaped from Yan Sheng's lips.

Suddenly, his calm expression froze, his lungs felt unbearably hot, and he coughed repeatedly.

He is unable to use the Breath of the Sun.

On the other side, Yuko endured the burning sensation in her lungs and forced herself to practice Sun Breathing.

Just as Yoriichi was about to interrupt her after seeing the condition of her lungs, Ikuko suddenly opened her eyes.

"I learned!"

Yan Sheng, who had just been overwhelmed with disappointment, felt as if he had fallen into an ice cave. He quickly turned his head to look.

"..."

Fresh blood was seen oozing from Yu Zi's mouth and nose.

Seeing her two older brothers looking at her, Yuko winked at them playfully, just about to perform a Sun Breathing: First Form: Waltz on them, and then... mistakenly thinking that enduring the burning sensation was enough, Yuko's vision went black.

In a physical sense, both eyes go black.

After a long while, Yu Zi, who had finished the rescue, sighed: "I thought I had learned it."

Yan Sheng: "..."

Yoriichi maintained a calm smile throughout: "It's okay, finding the breathing method that suits you best is the most important thing."

"Sun Breathing is not necessarily more powerful than other breathing techniques."

Yuko smiled outwardly, but inwardly she was cursing.

You are a liar!

She had read the story; Tanjiro almost killed a Lower Moon using Hinokami Kagura!

The days passed by as I learned the breathing techniques.

Iwakatsu lacked the ability to use the Breath of the Sun, but he was not lacking in talent.

He quickly created his own breathing technique based on the Sun Breathing, which was later known as the Beginning Breathing Technique – the Moon Breathing.

"Um...brother, could you teach me?" Yu Zi forced a smile, her voice sweet, and asked him with a stiff upper lip.

Yan Sheng's lips curled slightly: "Why is it the right way to address me now?"

Yu Zi was speechless, and her sweet voice instantly snapped back: "Fine, don't teach me then!"

She created her own Star Breathing technique!

Ever since Kokushi created Moon Breathing, not only has she jokingly said she wants to create Star Breathing, but even the bystanders in the Demon Slayer Corps have been making similar comments.

"Yuko, when are you going to create Star Breathing?"

Yuko always replied like this.

"Just today!"

However, her understanding of breathing techniques was far from sufficient; just learning them exhausted her brain, let alone creating one herself.

Otherwise, she wouldn't have shamelessly come to Iwakatsu to learn Moon Breathing.