Demon Slayer: My breathing technique went awry after Nezuko pushed me down.

Killing someone... no, killing a ghost, also requires resolve.

While Tanjiro was trying to calm himself down...

A strong, large hand silently pressed down on his shoulder.

Tanjiro was startled and stiffly turned his head, whereupon a fiery red tengu mask came into view.

"This alone won't kill him!"

Beneath the Tengu mask, a low yet reassuring voice formally bound this destined master and disciple together.

If the story proceeds as normal, Tanjiro should then face Urokodaki Sakonji's first demon-slaying test.

Then, everything will continue to proceed according to the original trajectory of this world.

but......

When Shirakawa Yu appeared on the steps, panting, everything... changed...

Nezuko, who had been obediently waiting in place, suddenly twitched her small nose twice.

Her pink eyes suddenly narrowed, turning into thin, cat-like slits.

An intensely rich fragrance, so strong that even her soul yearned for it, instantly overwhelmed her already dwindling rationality!

The next second, Nezuko's glistening saliva drew two translucent lines in the air, and she instantly vanished from her spot.

"What the hell—"

Before Bai Chuanyu could finish speaking, he was tackled to the ground.

A petite yet incredibly strong body straddled his waist, a pink kimono brushing against his cheek.

Beneath the tengu mask, Urokodaki's expression suddenly changed drastically.

"Oh no! He has rare blood!"

Without a second thought, he turned and chased after him.

But is it too late...?

Nezuko's completed downward nibble sent a chill down Urokodaki's spine.

This little ghost girl, who was so calm just moments ago, clearly couldn't resist the temptation of Shirakawa Yu's blood.

At this moment, she had already buried her head in Shirakawa Yu's neck.

There's no other way! It's bleeding!! It can't be left alive!!!

Just as Urokodaki drew the Nichirin short sword that he had always kept at his waist, preparing to finish off Nezuko.

Shirakawa Yu's delicate face emerged from in front of Nezuko.

The moment I saw this face.

Urokodaki's heart skipped a beat, as if struck by lightning, and he stood there stunned.

What kind of expression was that?

Enjoyment? Satisfaction? Relief?

You little rascal, are you being eaten by a ghost?! Why do you look like you're sneaking a midnight snack?

And where are your hands?

If a ghost pinches your shoulder, fine, but what's with you lifting up a female ghost's butt?!

Fortunately, the little ghost girl had a bamboo tube in her mouth. She was biting it and couldn't open her mouth properly; it looked more like she was rubbing against it.

No wonder...that kid had such a...subtle expression on his face.

Of course, these are not the fundamental reasons why Urokodaki stopped.

Even if you can't bite it, it's still a ghost.

The blush on Bai Chuanyu's face was what truly surprised him.

This fiery red color is not blood, at least not blood spilled outside.

It was a flush that radiated from within.

As the forewater column, Urokodaki possesses extremely keen senses.

He clearly "heard"—

dong dong!dong dong!dong dong!

Shirakawa Yu's heart was pounding like a drum.

The sound of blood rushing through the veins was loud and clear.

Along with this, body temperature also rises.

Even more noticeable is breathing.

The previously chaotic breathing, without anyone noticing, became deep, steady, rhythmic, and powerful.

With each inhale, the chest bulges noticeably.

With each exhale, a faint pinkish wisp of air escapes from between the mouth and nose?

Concentrate your breathing completely?!

At that moment, Urokodaki loosened his grip on the sword.

He recalled the stubborn yet unwilling look in Bai Chuanyu's eyes every time he practiced breathing techniques during those eight months.

This kid dreams of learning breathing techniques.

Now, the opportunity is right in front of us.

Do not disturb.

"Nezuko! Let him go!!!"

Tanjiro, belatedly realizing what was happening, finally reacted and rushed over with a scream.

But Urokodaki grabbed him, covered his mouth, and lifted him up.

"Ugh! Ugh!" Tanjiro's eyes widened, and he flailed his arms and legs.

"Don't make a sound." Urokodaki lowered his voice, his eyes fixed on the two people entangled on the ground. "Watch."

Tanjiro followed his gaze.

In the darkness, Shirakawa Yu lay on the grass, with Nezuko on top of him.

The boy closed his eyes, seemingly enjoying himself, but his breathing became deeper and more steady.

With each breath, the pink breath emanating from his mouth and nose became more and more pronounced, like the color of cherry blossoms in early spring, gently enveloping him and Nezuko.

“That is…” Tanjiro forgot to struggle.

Urokodaki didn't speak, his lips pressed into a straight line beneath the mask.

That pinkish airflow... was definitely not any of the five basic breathing techniques, and it was even different from any known derivative breathing techniques!

It's somewhat similar to the breathing technique of the current Love Pillar, Mitsuri Kanroji, but not exactly the same.

Urokodaki couldn't help but mutter, "This kid actually created his own unique breathing technique at the critical moment of life and death!?"

Watching Shirakawa Yu's breathing become increasingly steady.

Watching Nezuko inhale the pinkish aura, he gradually relaxed.

She even unconsciously started rubbing her cheek against his chin...

Urokodaki suddenly felt...

This troublesome little thing I picked up might actually be quite a monster.

Meanwhile, on the ground, in Bai Chuanyu's mind, a mechanical voice was frantically scrolling through the screen:

[Host has successfully mastered the breathing technique!]

[Conditions met!]

[System is in the process of self-adaptation—adaptation complete!]

[System activation in progress - Activation complete!]

Welcome to the Breath of Color Assist System!

Shirakawa Yu's tightly closed eyelids suddenly snapped open.

coming.

His cheat ability has finally... been activated! (≧?≦)?

Chapter 2 Tanjiro: You bastard, let go of my sister!

But this name... Breath of Color?

Shirakawa Yu was stunned.

Why does this name sound so unserious?

Just as improper as Nezuko's current pose!

Before he could think it through, the system prompted him to continue:

[The breath of color, the scent of a woman! Moved by emotion, controlled by desire.]

[Special characteristic: Extremely attractive to the opposite sex; with the opposite sex nearby, regardless of whether they are hostile or not, the power of the breathing technique is greatly enhanced.]

[Core Rule: Analyze the other person's constitution by using their 'top-tier, deeply penetrating' body odor.]

[Resolution levels are available in four options: 30%, 60%, 90%, and 100%!]

[Tier 1, First Experience of Love. Resolution reaches 30%, granting basic boost to abilities.]

[Close contact with women grants a comprehensive boost to physical attributes. (The stronger the target female character's overall strength, the higher the potential for this boost.)]

[Second tier, Love is everlasting. Resolution reaches 60%, gaining the ability of 'Total Concentration Breathing Technique - Constant'.]

[When within a certain range of a suitable female character (initial radius: five meters), the user will automatically enter a "Full Concentration Breathing - Normal" state, constantly strengthening their body without needing to actively maintain it.]