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

It was only after Yuko perfectly demonstrated all the sword forms of Snow Breathing that Yoriichi truly understood the difficulty of mastering Snow Breathing.

He really wondered if the Demon Slayer Corps would question their existence when they looked at the training manual left by Yuuko, given how they had mixed up the breathing techniques in such a haphazard way.

Compared to the physical requirements of Sun Breathing, Snow Breathing encompasses almost all existing breathing techniques.

This inevitably leads to the result that practitioners of breathing techniques cannot perfectly master all forms.

If you can't adapt to Thunder Breathing, you can't master the Seventh Form; if you can't adapt to Sun Breathing, you can't master the Ninth Form.

Not to mention that Snow Breathing itself originated from the Feng Shui Breathing Method, with these conditions layered upon each other, making it almost impossible for anyone to master.

……

In the days that followed, the brother and sister would practice swordsmanship in the mountains outside the city whenever they had free time.

Under Yoriichi's guidance, Ikuko made rapid progress.

Even Yoriichi began to marvel at Ikuko's talent.

He thought to himself, "This talent may have already surpassed that of my elder brother."

Whether it's a talent for breathing techniques or a talent as a swordsman.

It's important to know that Yuko had never systematically studied swordsmanship before she turned eighteen.

When he was with the Demon Slayer Corps, Yoriichi was often away from home and had other people to teach, so he didn't put much effort into Yuuko.

Now, he has plenty of time to teach Yuko.

Moreover, becoming a demon also conveniently solved Yuuko's only weakness.

That is, the weaknesses of being a woman.

In terms of combat effectiveness, women are naturally inferior to men.

But now Yuko can even easily wield the Crimson Blade with the power of her demonic transformation.

Although she looked at the crimson blade in her hand, she was even more afraid.

There's no denying that she has indeed become stronger.

The fight between the two in the mountains began to attract the attention of passersby.

During that time, rumors even circulated in the city that the God of Fire and the God of the Moon were fighting in the mountains outside the city.

Because some people saw the silvery full moon fall from the sky, and others saw blazing flames.

At first, naturally no one believed it, but some people kept digging deeper. When those who were interested came to the mountains outside the city to investigate, they discovered dense, inhuman battle traces in the forest, and they were so frightened that they fell ill.

The mountains outside the city were gradually regarded as a forbidden zone by the people, who dared not venture out easily.

As the story became increasingly outrageous, Yuko and her companion became much more restrained.

In fact, based on Yu Zi's current observations, this world's strength, at best, would be considered a high-level martial arts world in the novels of her previous life.

Even someone as strong as Yoriichi could be killed by a child with a knife if he didn't move.

Her physical condition is not as good as her current strength, which is comparable to steel.

Whether it's physical attributes or the power of her sword techniques, she is clearly stronger now.

But Yoriichi always manages to counter and defeat her with his extreme speed.

Yoriichi's speed in completing all twelve forms of Sun Breathing in that instant was so fast that even Yuuko couldn't see it clearly now, which explains why Muzan is questioning his existence.

It seems to confirm the saying that speed is the only way to break through all martial arts.

……

After finishing their sword practice, the brother and sister lay in the quiet, dense forest, where the insects and wild animals had been nowhere to be seen for a long time.

With summer approaching, Yuko said, "Brother, I'd like to visit Tanjiro's family soon."

"Hmm." Yoriichi paused for a moment, then responded softly.

"Brother, you should go too."

"..."

Yu Zi sat up and looked at him with a half-smile: "Brother, could it be that the last time you left, the ceremony was too formal and you were too embarrassed to go again?"

They're giving away earrings and sword-wielding props.

Yoriichi: "..."

Seeing that Yoriichi remained silent, Yuko raised her eyes and pondered, "If you don't go, what if I lose control..."

"……go."

Yu Zi smiled slightly, and said, "I'll ask you what you think of this open scheme!"

Although Yoriichi believed in Ikuko, demons are unreasonable and inhuman creatures.

He wouldn't doubt that if Yu Zi really lost control of her desires one day, it wouldn't be Yu Zi's fault.

Humans do possess a will that transcends limits, but there are some things that willpower alone cannot achieve.

……

The Tanjiro family was overjoyed to see Mr. Yoriichi and Ms. Ikuko again.

Moreover, it seems that Mr. Yoriichi's inner knot has been untied, and he smiles more often.

Tanji was happy about this for a long time.

During her last visit to Tanji's house, Ikuko guessed that the blue spider lily blooms in the summer.

This time, we found it.

On an August night, Yuko stared at Shi's grave all night but didn't see a single flower.

During the day, she would have Yoriichi keep watch.

Although he didn't understand Yuko's meaning, he obediently waited until 2 p.m., when the day was at its hottest, and discovered the flower that had suddenly bloomed.

"Ah~"

When Yoriichi picked the spider lily and brought it to Yuuko, he was wondering what she was going to do when he saw Yuuko open her blood-red mouth and eat the blue flower raw.

Tanji’s family: “…”

Yoriichi: "..."

Licking her lips, Yuko commented, "It doesn't taste good."

!!!

Nonsense! They weren't even cooked through!

Everyone's pupils dilated in shock.

Yoriichi frowned slightly: "Then, what exactly is it?"

Yuko said seriously, "Muzan seems to have been searching for this all along. Maybe it's something that can help demons overcome sunlight."

Yoriichi's eyes narrowed slightly. "Overcome...sunlight?"

Yuko sat inside the house and stretched out her finger toward the light in front of everyone.

zizi...

Yu Zi withdrew her finger without changing her expression, and the flesh and blood quickly regenerated.

Yu Zi pondered, "It shouldn't be wrong, but perhaps a certain amount of quantitative change is needed."

Zhu Mizi looked at Yu Zi's fingers, which had returned to normal in the blink of an eye, with surprise, and hesitated for a moment before saying, "That flower, I think I sometimes see it behind the house."

"Yes, it's behind the house. These flowers should only bloom in the summer."

"That seems to be the case. We even ate it as a wild vegetable before," Zhu Mizi recalled.

Tanji's expression changed, and he said seriously, "If it can really help the Demon King overcome sunlight, then can it be used as bait to lure her out?"

Yuko and Yuan both shook their heads.

Yuko said helplessly, "That guy is very cautious, especially when Yoriichi might still be alive. He would never show himself in person."

"On the contrary, it might alert the enemy."

Zhu Mizi suddenly stood up and picked up a hoe from the side.

Everyone looked at him in confusion.

"If we destroy that flower, we won't have to worry about the evil spirit finding us, right?"

"In that case, he will never be able to overcome the sunlight."

You're so smart.

Yuko mentally complained for a moment, then quickly stopped him: "Wait for Zhu Mizi."

If you do that, then Muzan might really be unable to be defeated.

Nezuko is the protagonist's younger sister! Besides Tamayo, she's the only demon who broke free from Muzan's control.

Who knows, in the finale, she might team up with Tanjiro and his sister to fight Muzan together.