Could it be that you're embarrassed?

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

Just haphazardly mixing breathing techniques like this, he really had to wonder if the Demon Slayer Corps would question their life choices when they looked at the training manual Yuko left behind.

Compared to the physical demands of Sun Breathing, Snow Breathing incorporated almost all existing breathing techniques.

This inevitably led to one outcome: practitioners of the breathing technique would be unable to perfectly master all the forms.

If you couldn't adapt to Lightning Breathing, you couldn't master the seventh form; if you couldn't adapt to Sun Breathing, you couldn't master the ninth form.

Not to mention that Snow Breathing itself was born from Wind and Water Breathing, so with these conditions stacked layer upon layer, it was almost impossible for anyone to master it.

In the following days, the siblings practiced their swordsmanship in the mountains outside the city whenever they had free time.

Under Yoriichi's guidance, Yuko's progress was incredibly rapid.

Even Yoriichi began to marvel at Yuko's talent.

He secretly thought, This talent might have already surpassed Older Brother's.

This applied to both her talent in breathing techniques and her talent as a swordswoman.

After all, Yuko hadn't systematically studied swordsmanship before the age of eighteen.

When they were previously in the Demon Slayer Corps, Yoriichi was often away on missions and had others to teach, so he hadn't focused much on Yuko.

Now, he had ample time to teach Yuko.

Furthermore, becoming a demon had incidentally solved Yuko's only weakness.

That is, the weakness of being female.

In terms of combat power, females were naturally inferior to males.

But Yuko could now easily manifest a Scarlet Blade using her demonic powers.

Although, looking at the Scarlet Blade in her hand, she herself was more frightened.

Undeniably, she had indeed become stronger.

The battles between the two in the mountains began to be noticed by passing travelers.

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

This was because some people saw a silver full moon falling from the sky, and others saw a blazing flame shining.

Naturally, no one believed it at first, but there were always those who dug deeper. When someone with ulterior motives went to investigate in the mountains outside the city, they discovered the dense, non-human combat traces in the dense forest and were so terrified they fell ill.

The mountains outside the city gradually became regarded as a forbidden zone, and people dared not enter or leave easily.

As the stories became more and more exaggerated, Yuko and her brother also became much more restrained.

In fact, from Yuko's current observations, the strength of this world, if placed in a novel from her previous life, would at most be considered a high-martial world.

Even someone as strong as Yoriichi could actually be killed by a child wielding a sword if he didn't move.

His physical fitness was inferior to hers, which was now comparable to steel.

Whether it was physical fitness or the power of her sword techniques, it was clearly her who was stronger now.

Yet, Yoriichi could always counter and defeat her with his extreme speed.

The speed at which Yoriichi completed the twelve forms of Sun Breathing in an instant was something even Yuko couldn't see clearly now, so it was no wonder Muzan questioned his life.

It was as if it perfectly embodied the saying: "In the world of martial arts, speed is invincible."

After finishing their swordsmanship training, the siblings lay in the quiet, dense forest. The sounds of insects and beasts had been absent for a long time.

Summer arrived, and Yuko said, "Older Brother, I want to visit Tanjiki's family recently."

"Mm," Yoriichi replied, pausing for a moment before softly agreeing.

"Older Brother should come too."

"..."

Yuko sat up and looked at him with a half-smile. "Older Brother, you don't mean you're too embarrassed to go again because the last time you left, things were too formal, right?"

He had given her earrings and performed sword forms.

Yoriichi: "..."

Seeing Yoriichi's continued silence, Yuko raised her eyes and mused, "If you don't go, then what if I lose control..."

"...I'll go."

Yuko smiled slightly. She wondered how he liked this open ploy!

Although Yoriichi believed in Yuko, demons were unreasonable and inhuman beings.

He wouldn't doubt it if one day Yuko truly couldn't control her desires; it wouldn't be Yuko's fault.

Humans indeed possessed willpower that could surpass limits, but some things couldn't be overcome by willpower alone.

Tanjiki's family was overjoyed to see Mr. Yoriichi and Miss Yuko again.

Moreover, Mr. Yoriichi's emotional burden seemed to have lifted, and he smiled more often.

Tanjiki was happy about this for a long time.

The last time Yuko visited Tanjiki's home, she had guessed that the Blue Spider Lily bloomed in the summer.

This time, she had indeed found it.

On an August night, Yuko stared at Uta's grave for the entire night but didn't see any flowers.

During the day, she had Yoriichi go to keep watch.

Although he didn't understand Yuko's intentions, he faithfully stayed until two in the afternoon, during the hottest part of the day, and discovered the flowers suddenly blooming.

"Ah~"

When Yoriichi picked the spider lily and brought it to Yuko, he wondered what she intended to do, only to see Yuko open her mouth wide and directly eat the blue flower raw.

Tanjiki's family: "..."

Yoriichi: "..."

Licking her lips, Yuko commented, "It's not tasty."

!!!

No kidding! It wasn't even cooked!

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. Perhaps it's something that can allow demons to overcome sunlight."

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

Yuko sat inside and, in front of everyone, extended her finger towards the light.

Sizzle...

Yuko retracted her finger without changing her expression, her flesh quickly regenerating.

Yuko pondered, "It should be correct. Perhaps a certain amount of change is needed."

Tamiko looked at Yuko's finger, which had returned to normal in the blink of an eye, with surprise. She hesitated for a moment and said, "I think I sometimes see that flower behind the house."

"Mm, it's behind the house. This flower should only bloom in the summer."

"It seems so. We even ate it as a wild vegetable before," Tamiko recalled.

Tanjiki's expression changed, and he said earnestly, "If it can truly allow the Demon King to overcome sunlight, then could it be used as bait to lure her out?"

Yuko and Yoriichi shook their heads in unison.

Yuko said helplessly, "That guy is very cautious, especially when Yoriichi might still be alive. He would absolutely not show himself in person."

"Instead, it might alert the enemy."

Tamiko suddenly stood up and picked up a hoe.

Everyone looked at her in confusion.

"If we destroy that flower, then we won't have to worry about demons finding it, right?"

"This way, he will never be able to overcome the sun."

You're too smart.

Yuko thought to herself for a moment, then quickly stopped her, "Wait, Tamiko."

If you do that, Muzan might truly become unbeatable.

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

Who knows, maybe she'll team up with Tanjiro for a brother-sister tag-team beatdown of Muzan in the finale.