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

Perception is a mysterious thing; it's the body's feeling about its surroundings.

It can be visual, auditory, or tactile, etc.

As breathing techniques become more precise, the development of the body can reach an incredible level.

It allows for more precise control over one's body, and amplifies bodily awareness.

Of course, perception can also be a talent.

Tanjiro's sense of smell, Zenitsu's sense of hearing, Inosuke's sense of touch, Kanao's sense of sight, and Genya's sense of taste are all innate talents that cannot be trained later.

Therefore, in their respective fields of talent, Yuko could not compare with them.

However, after Tamayo's transformation, her perception improved significantly, regardless of the precision of her breathing techniques; it was as if her level of life had been elevated.

She became what Tamayo referred to as the second true 'demon' after Muzan.

The radiating senses seemed to form an unobservable circular aura that rippled outwards, quickly enveloping the Ubuyashiki residence.

It's no exaggeration to say that even as she lay in bed, the entire Ubuyashiki mansion was fully within her perception.

Even the Ubuyashiki couple whispering next door were no exception. Ikuko could pinpoint their location by sensing the airflow, and her powerful hearing allowed her to hear what they were saying…

Yu Zi blushed and quickly shifted her senses away, spreading them in other directions.

……

It was a good, quiet and peaceful night.

Yu Zi peacefully closed her eyes.

The steady breathing around her rose and fell, making Yuko feel that the children around her truly belonged to the human realm.

……

Yuko gripped the blanket tightly.

It's still a bit scary.

……

Suddenly, Yuko sat up abruptly.

Her movements did not wake the sleeping children. Gazing at the children still sound asleep, Yuko's figure disappeared from the room the next moment.

Outside, Yu Zi and her companions darted across the courtyard and arrived at the corner of the outer wall.

One after another, bizarre and ugly eyeball monsters were moving rapidly with their tentacle-like limbs, spreading out in all directions.

One of the groups headed towards the Ubuyashiki mansion.

Yuko hid in the shadows in the corner, silently watching this scene.

It was faster than she had imagined.

Last night, she had specifically observed the movements of these eyeball monsters, which were exploring in the opposite direction from the Ubuyashiki mansion.

Today, however, it appeared out of nowhere in the completely opposite direction.

These eyeball monsters move very fast and are excellent at concealing their presence; even the Pillars would have a hard time sensing them unless they saw them with their own eyes.

That means she has now undergone a super evolution, and in the past, it might not have been possible to detect her from such a distance.

After all, perception is something she's not very good at.

Seeing that the eyeball monster was about to squeeze into the Ubuyashiki mansion through the crack in the door, Ikuko hesitated for a moment, then slipped away.

In the infinite city.

"Lord Muzan, you've marked another residence," Nakime's calm voice rang out.

Following her gaze, Muzan saw a quiet mansion come into view.

With the help of Nakime's perspective, his senses were greatly weakened, making it impossible for him to effectively perceive the specific situation within the mansion.

But that's alright, these eyeball monsters will explore the entire mansion, not missing a single ant.

Having learned the approximate location of the Ubuyashiki mansion last night, Muzan was in a fairly good mood.

There are quite a few buildings around here; one of them might be the hiding place of the Ubuyashiki.

"Very good, continue exploring." Muzan gave the order in a very good mood, already intending to turn his gaze away.

Suddenly, as the eyeball monster walked down the corridor, rounded a corner, and prepared to explore the general situation inside the houses, a straight figure stood in the corridor.

Humanity?

This distance?

Muzan Kibutsuji's eyes narrowed slightly. Nakime's Blood Demon Art ability, while lacking in pure perception, should have been sufficient to not detect her even at a distance of just around a corner.

Is this method of concealing one's aura a Pillar's?

Nakime seemed to realize this as well, and paused in her piano playing. The eyeball monster moved upwards following the low-angle view.

Muzan's expression also became more focused.

who is it?

They actually have this ability.

The Ubuyashiki mansion has not yet been explored, which will inevitably arouse the other party's suspicion.

But as Nakime's perspective rapidly shifted upwards, Muzan's thoughts abruptly broke down.

The weather is great tonight, or rather, in this era before severe air pollution, the moonlight is as bright as day on a clear night.

The bright, cold moonlight poured down onto the eaves, and after passing over the shadows on the soles of the feet and legs, the figure dressed in simple black clothing came into Muzan's eyes.

The crimson hair contrasted sharply with the silvery moonlight. No need for excessive details, just the outline alone created a strong visual impact that shook the memories in Muzan's mind.

That monster...

Muzan Kibutsuji didn't even notice the voluptuous figure in front of him; the similar shape alone reminded him of painful memories.

It felt like a burning pain coming from all parts of my body.

Nakime shared the same feeling as him.

The more powerful a demon is, the more Muzan cells it has; it's practically impossible for a demon to become stronger solely by eating people.

Compared to cannibalism, Muzan's small act of kindness was enough to allow a weak demon to grow into one of the Twelve Demon Moons.

Simply put, it depends on luck.

Those who were lucky enough to be like Rui, the former Lower Moon Five, gained Muzan's favor simply because they had a similar experience to him.

Nakime was no exception; her unique Blood Demon Art made her Muzan's confidante.

This single technique, the Infinite Castle in Another Dimension, was enough to render a monster like Yoriichi powerless and enraged on the ground.

Having absorbed a large number of Muzan's cells, Nakime, upon seeing this scene, couldn't help but recall the image of that monster.

Unlike Muzan, who suffers from Yoriichi phobia, Nakime quickly calmed down.

Knowing full well that this was her boss's dark history, she decisively chose to ignore it and calmly reminded him, "Lord Muzan, we've found the target."

Nakime's calm voice brought Muzan back to his senses.

Kibutsuji Muzan's wine-red eyes shrank to the size of pinpoints as he gasped for breath, beads of cold sweat appearing on his forehead.

He clearly knew about the woman's existence and appearance all along, and his goal was even to devour her.

But suddenly, he couldn't help but think of that monster.

It's like watching a horror movie and being suddenly pressed against the face by a ghost when you're completely unprepared.

Even if you already knew it was a horror movie.

Fortunately, after Kokushibo became a demon, he didn't look like that monster at all, otherwise he might have had to consider changing partners.

Muzan's breathing gradually calmed down. He opened the front of his shirt, and for a moment just now, he was sweating.