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

"Miss Yuko, thank you for your guidance." On the training ground, several Demon Slayer Corps swordsmen who had been taught by Yuko bowed in gratitude.

Yu Zi said gently, "This is all thanks to your own hard work."

"Please keep up this enthusiasm, and believe that one day this effort will be rewarded."

Everyone stared in a daze: "Miss Yuko..."

How gentle, Ms. Yuko.

"Let's continue training using the same method as before." Yu Zi glanced around the training ground, bowed slightly to everyone, and left.

"I hope Miss Yuko isn't injured."

"With Yuko's strength, she would definitely have become a Pillar if she hadn't been injured."

"Of course! Miss Yuko is the younger sister of those two gentlemen!"

"Miss Yuko's Snow Breathing is a powerful breathing technique that is comparable to the original breathing technique. To this day, she is the only one in the Demon Slayer Corps who has mastered it."

Everyone watched the departing figure with longing, until someone blurted out a sentence.

"Miss Yuko is so gentle, I really want to marry her."

His words instantly angered the others.

"You damn Matsuda! Don't you even take a piss and look at yourself in the mirror? The only one worthy of Miss Yuko is me!"

"Huh? Yamamoto, you can die too! Don't even think about defiling my gentle Miss Yuko!"

Yuko, who had already left, obviously didn't hear the commotion, otherwise she might have made a comment.

Who spread such an exaggerated rumor?!

They even started breathing side by side!

It's a case of praising someone to death! Absolutely a case of praising someone to death!

After instructing everyone, Yuko returned to her room to retrieve the prepared tea set and headed straight for the back mountain.

Swoosh~

Before even reaching the summit, Yuko heard an astonishing sound coming from above.

Iwakatsu was wielding a Nichirin Blade, practicing the sword form of Moon Breathing, but judging from his frenzied aura, his mind was far from peaceful.

Yuko sat down at the stone table and waited quietly.

About twenty minutes later, Yan Sheng finally stopped, panting heavily.

Yuko called out, "Brother."

Iwakatsu sheathed his Nichirin Blade and walked straight toward her.

Yu Zi poured a cup of tea: "Brother, please."

Yan Sheng picked up the teacup, tilted his head back and drank it all in one gulp without any manners, then slammed the teacup heavily onto the table.

This was something Iwakatsu, who usually paid great attention to etiquette, had never done before.

Yuko's eyes flickered slightly as she noticed the veins on Iwakatsu's hand, which was gripping the teacup, becoming increasingly prominent. She calmly asked, "Is my brother troubled by the mark?"

She knew; she always had.

She is an adult who has lived two lives. Influenced by Akeno when she was young, Yuko once regarded herself as a real child and acted coquettishly in her mother's arms.

But after Zhu Nai's death, she returned to being an adult.

With the delicate emotions of an adult, she knew very well what kind of person Yan Sheng was.

Upon hearing Yuko's words, Iwakatsu gripped his teacup even tighter, and his breathing became slightly disordered.

Before Iwakatsu could speak, Yuko continued, "Brother is unwilling, isn't he? Because there's no time left to catch up with Yoriichi."

"..." Yan Sheng instinctively stopped breathing.

Yuko always manages to see through his heart without him even realizing it.

Sometimes, he felt that Ikuko was more difficult to deal with than Yoriichi.

When communicating with Yuko, Iwakatsu never liked to speak, because he seemed to have no secrets from her.

Noticing Iwakatsu's shock, Ikuko sighed from the bottom of her heart.

She raised her head slightly, her wine-red eyes looking tenderly at Yan Sheng.

“Brother, you don’t need to prove anything to anyone. I have always been proud of you.”

"Whether it's my older brother or Yoriichi, they are both unique in my eyes."

Yan Sheng was shaken, his eyelids lowered, his eyes trembling.

He knew it all along.

No matter how hard I try, I can never catch up with Yoriichi.

He was just unwilling to accept it...

Yuko pressed her advantage: "Brother..."

She paused, a tickling sensation in her throat triggered a series of uncontrollable coughs.

"Cough cough."

The cough aggravated her lungs, and the excruciating pain caused Yuko to cover her mouth and bend over in agony.

Iwakatsu reached out a hand to help her up, "Yuko!"

Yu Zi wiped her mouth, looked up and forced a smile, saying, "It's nothing serious."

Yan Sheng was silent for a moment: "Take your hand out."

Knowing she couldn't hide it from him, Yu Zi sighed and opened her palm, revealing a patch of cherry-red blood.

When did it get worse?

About a month ago.

"What did the doctor say?"

"Assuming no strenuous exercise, he should have about three more years to live."

Yuko said optimistically, "It's about the same time as the scars, so it can be said to have no impact on me at all."

Iwakatsu remained silent; his all-knowing understanding of the world allowed him to clearly assess Ikuko's physical condition.

However, Yuko strongly objected to the brothers' spying on her, saying it was invading a girl's privacy, and said a series of things that he couldn't quite understand.

They said things like posting on Xiaohongshu (Little Red Book) and cyberbullying him on Weibo.

Now it seems she was just hiding her injuries.

"Stop talking, I'll take you to see a doctor."

"No need, my body..."

Before Yu Zi could finish speaking, her older brother forcibly carried her down the mountain.

Yu Zi paused for a moment, then a smile curved her lips.

That's good... Brother...

……

There is no doubt that Kokushiro was turned into a demon by Muzan himself.

As for when and where, she didn't know.

When Yuko was initially worried, she secretly followed Iwakatsu out several times.

It was only later, when his physical strength began to wane, that he gave up the idea of ​​following Yan Sheng.

It should be fine, right?

Given Iwakatsu's strength, even if he encountered Muzan, escaping shouldn't be difficult.

……

While on a mission, Iwakatsu encountered the progenitor of demons—Kibutsuji Muzan—for the first time.

At this moment, Yan Sheng still faced the Ghost King with his sword drawn, until the Ghost King spoke.

"Why not just become a ghost?"

"As long as you become a ghost, you can have infinite years."

"You want to pursue higher sword skills, while I want to try turning a swordsman who knows breathing techniques into a demon."

"How about it? You're different from other swordsmen; you have a choice."

Yan Sheng's breath hitched, and his expression became somewhat moved.

Despite Yuko's repeated attempts to comfort him, and despite some changes in his own heart.

But what people think is hard to sway with just a few words.

Those who have been bent over by reality and abandoned their dreams are not necessarily unwilling to achieve them.

Once a possible opportunity arises, they will grasp it tightly, like a drowning person clutching at the last straw.

Muzan's voice almost instantly awakened Iwakatsu's dream of surpassing Yoriichi.

Yes.

If he could become a demon, and if he could have an infinite lifespan, then he would have time to keep training and would definitely be able to surpass Yoriichi.

The only cost is not being able to sunbathe.

With the opportunity to realize his dream within reach, Yan Sheng's breathing became heavier.

Almost as soon as his Adam's apple bobbed slightly, Yu Zi's gentle face appeared before him, and her soft voice followed.

'Brother, you don't need to prove anything to anyone. I've always been proud of you.'

'Whether it's my older brother or Yoriichi, they are both unique in my eyes.'

Yan Sheng subconsciously tightened his grip on the hilt of his knife.

Muzan frowned as he looked at him.

That's a real shame; it seems we'll have to find someone else.

Just as the atmosphere became tense, Yan Sheng's fingers, which were tightly gripping the hilt of his sword, relaxed slightly, and he suddenly spoke: "If you become a demon, can your illnesses also be cured?"

Muzan paused for a moment, then a wicked smile curled at the corner of his mouth.

"Isn't that a matter of course?"

"If you become a demon, you can easily heal any kind of injury."