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

Kokushibo never underestimated his younger sister; in fact, he would naturally feel a sense of shame when comparing them.

He was not only inferior to his younger brother Yoriichi, but also to Ikuko.

He had known this humiliating fact for hundreds of years.

His younger sister, who had only secretly practiced wielding a wooden sword in her room since childhood, was able to catch up with and surpass him in just a few years after joining the Demon Slayer Corps and undergoing systematic training.

Even in the realms of patterns and translucency, Yuko was one step ahead.

If Yoriichi's strength was such that he couldn't see his back from the very beginning, it was a strength that was difficult to catch up with even with all one's might.

Yuko's strength was such that Kokushibo could only watch helplessly as she gradually approached and surpassed his own power. No matter how far he advanced, Yuko's pace was always a step faster than his.

This feeling was gradually forgotten deep in my mind many years after Ikuko and Yoriichi died.

And now, that feeling is back.

Kokushibo spat out a mouthful of blood, and the piercing damage all over his body was slowly healing.

That Blood Demon Technique...

I haven't seen Yuko use it in previous battles.

Kokushibo was well aware of his sister's unconventional behavior and suspected she was deliberately holding back, intending to sabotage him at a crucial moment.

In fact...

Although he viewed his sister in a rather dark light, his general direction was still correct.

After Yuko evolved her Blood Demon Art, she did consider saving it for a crucial moment, especially when facing her own older brother.

Given that Muzan can only use the tactic of stalling, it would be best to reserve this ability for his older brother.

But Yuko didn't expect Muzan to be so unreasonable, bringing Kokushibo along to his meeting with his best friend.

Now that the Demon King and Upper Moon One are right in front of her, if Yuko still has any thoughts of shady Shibo, she might just be in for a disaster.

Moreover, it was a complete disaster; there was no need for a fight, Muzan could simply declare victory.

Yuko's attacks hadn't stopped yet; she had to take advantage of the fact that Muzan hadn't reacted yet to eliminate the opportunity for them to join forces.

With her Blood Demon Art now having a restraining effect on regeneration that is no less than that caused by the Crimson Blade and sunlight.

If the injuries are severe enough, even Muzan would have difficulty recovering immediately.

Yoriichi has already proven this point through his actions.

Even Muzan couldn't avoid the advantage of the Crimson Blade's restraint.

Yuko swung her sword, and the white Nichirin Blade seemed to ignite in mid-air, instantly turning the blade into a layer of scorching red light.

Without any mercy, he slashed at Kokushibo's neck.

She wasn't sure if Kokushibo had overcome his neck weakness, but if Upper Moon Three could do it, there was no reason why the First Moon couldn't.

But in any case, beheading remains the most effective method.

Kokushibo's injuries had not yet healed, and the regeneration was much stronger than he had imagined. Faced with Yuko's attack, he did not hesitate to temporarily avoid the attack.

However, Yu Zi did not intend to let him off so easily. A trickle of blood oozed from Yu Zi's palm and flowed towards the blade with the momentum of her swing. When it touched the scorching red blade, the blood disintegrated into droplets, making a hissing sound as if evaporating, and rolled down the tip of the blade into the air.

Crimson drops of blood floated before Kokushibo's eyes.

Kokushibo instinctively sensed danger from the drop of blood.

The blood droplets suddenly exploded in front of Kokushibo, and blood lines as straight as iron wires splattered out at an extremely fast speed.

That kind of tactic again!

Kokushimona's eyes, which were gradually recovering, saw the path of the blood lines and tried his best to dodge.

But because of the close proximity, he could only protect vital parts like his neck and head, and his body was once again pierced and torn to shreds.

Muzan was almost caught in the crossfire, but he retreated to a safe position and frowned.

What a useless fellow, to be compressed like this. Is it because he still has some human emotions left in his heart and can't bear to do it?

Or……

Muzan turned his gaze back to Yuko.

Their figures gradually overlapped and intertwined, the clanging of weapons and the sparks from the clashing of iron blades flashing in the darkness.

Something is wrong...

A hint of hesitation flickered in Wu Can's crimson eyes.

This woman... there's something wrong with her aura.

It was only then that Muzan truly noticed Ikuko's condition.

It wasn't like that monster; it possessed an aura that was restrained, like that of an ordinary person.

It doesn't have the same powerful aura as Kokushibo.

The aura emanating from him gave Muzan a strange feeling that he couldn't quite describe.

But soon, Muzan's eyes, which were filled with doubt, suddenly narrowed and trembled slightly.

It's a difference in the level of life!

That woman...

It wasn't just that it overcame the sunlight, but that it evolved to be like him... no, even more perfect... overcame the sunlight...

Just as that woman said, she was the truly perfect ultimate being.

Muzan gritted his teeth, and his facial expression visibly contorted into a ferocious grimace.

What a joke.

He felt that such a thing should not be allowed to happen.

Suddenly, just as his face contorted in rage and his mind went blank, a blade radiating intense heat came into view.

This was followed by a sarcastic remark.

"What are you angry about all by yourself?"

what?

What is Kokushibo up to?!

Muzan's pupils contracted slightly, and he subconsciously swung his hand forward.

A sharp, fleshy whip lashed out with a sonic boom, aimed straight at Yuko's head. There was no doubt that if this strike hit, Yuko's head would explode on the spot.

Yuko ducked to avoid it, a bead of cold sweat sliding down her forehead.

It’s really fast.

He was far more powerful than Muzan, whom he faced in that dream-like nightmare.

Although she had expected it, it was only when she actually faced this monster that Yuuko truly understood what Yoriichi meant when he said that even a slight scratch could be fatal.

This speed is completely beyond what humans can withstand.

Her physical abilities were completely outmatched by this monster; the difference in their physiques was not even comparable.

If it were just a matter of reaction, it would be very difficult for humans to avoid an attack at this speed.

Fortunately, the opening of the transparent field is very effective in countering this kind of direct attack.

The moment Muzan raised his hand, Yuko noticed the movement of his muscles through her clear vision.

The blade struck Muzan's shoulder, severing his arm in one stroke.

Muzan's pupils trembled violently as a thought began to frantically grow in his mind, something he hadn't experienced in centuries.

This woman...

Could it be that they deliberately lured him out?

From the very beginning, the plan was to lure him out by using his long-cherished dream of overcoming the sunlight.

In an instant, Muzan felt a chilling coldness penetrate his very bones.