One-way traffic

For a moment, my consciousness was completely immersed in the world formed by this spirit.

Before him stood a black-haired girl dressed in clothing resembling a kimono.

Completely unknown, someone I've never met before.

A girl I've never seen anywhere else could possibly appear in Hatsune Miku's heart under these circumstances.

…but.

For some reason, Hatsune Miku did not become wary of her appearance.

It's as if that's how it should be.

"I was hoping for the person who was by your side, but it seems that's not going to work either... huh."

"What...are you talking about?"

Unable to understand what the other person was saying, all that could be seen was that the girl shook her head, and then looked at Hatsune Miku with unwavering determination.

"...I've been watching you all along."

"Eh?"

“I have already sensed your entire journey with that person so far, through the contract you left behind a hundred years ago.”

A hundred years ago... a contract?!

What was she saying?

"Ugh——!"

But at that very moment, Hatsune Miku suddenly felt a severe headache.

She clutched her head; the excruciating headache made it difficult for her to breathe.

"My head hurts so much...! What... what's going on?!"

“…Miss Hatsune.”

The black-haired girl took a deep breath.

"My name is Phantom Princess."

“In a generation nearly a hundred years ago, you made a pact with me at that time, asking me to return this power to you in the present.”

"Power...? What...are you referring to?"

Hatsune Miku is becoming increasingly confused by what she's saying.

However, the girl no longer hesitated.

She raised her hand, and then...

A faint pink glow condensed in her hand.

"…cherry?"

It's a cherry blossom.

However, it has a completely different appearance from the cherry blossoms we usually see in real life.

The cherry blossoms gathered in the girl's hands and gradually formed into a tangible object.

Knife.

It was a weapon that was clearly a Japanese sword. The long sword was sheathed in a scabbard that was as brown as cherry blossom wood. The girl held it in her hand and handed it to herself.

"Now that things have come to this, I think it's time to return it to you no matter what."

"..."

Hatsune Miku was quite surprised by all of this.

A sudden, inexplicable headache; a girl who suddenly appeared in his consciousness; and—

This long sword of unknown origin.

What exactly happened? Why would she say something like "myself from over a hundred years ago"? What's the deal with this knife? And who... is this girl?

“I know you are very confused about the current situation, and even hostile towards me.”

She looked at Hatsune Miku very seriously.

"But now... there's no time left. I'm willing to give up my right to be born into this generation, but! No matter what, you have to survive!"

"If those two enemies are left unchecked, everything will be destroyed... including everything you love!"

This sentence seemed to resonate with Hatsune Miku.

"Please! If you can grasp this knife, you can regain the power that was originally in your soul... Even if you can't win, you must live!"

Unsure of where the motivation came from, Hatsune Miku channeled her thoughts into force and grasped the knife offered to her.

If we fail, everything will be destroyed, including the people we love and the life we ​​cherish.

Family, comrades, people around me, and all those I love.

All of this will vanish into nothingness.

Can she really allow that kind of thing to happen?

"...No way."

She gritted her teeth.

A sharp, swift aura, like the wind, instantly burst forth from the scabbard in her hand.

"We can't give up like this!!!"

In an instant.

The pitch-black space of consciousness was instantly covered by countless beautiful flowers.

Cherry blossom petals, like rain, enveloped the entire world.

"...That will do."

The girl who calls herself "Phantom Princess" stares directly at Hatsune Miku, who floats amidst flowers in the space where black and cherry blossoms meet.

Her body then transformed into one of countless flower petals.

"Presumably, your memories of your past life will be restored after this battle."

"When that time comes, please bring the person beside you and return to our era to end everything."

The body of the Phantom Princess completely dissipated into the endless cherry blossoms.

But a final sentence was still left in the air.

"I will be waiting for you a hundred years ago."

"The embodiment of 'Senbonzakura,' Hatsune Miku."

————————————————————————————————————

Then, an incredible interlude was inserted into the battle.

Hatsune Miku should have been lying on the ground, unable to muster even the slightest bit of strength.

His entire body was covered by an aura of endless power.

"oh--?!"

Those who managed to fend off the two figures, one in black and one in red, became increasingly interested.

The black-clad figure suddenly revealed an unusual look in its eyes.

He moved with a speed that surpassed even light, breaking through all the defenses and arriving in front of Hatsune Miku in one breath.

but.

Despite being faster than the speed of light, it still couldn't catch up with the power surging from within the girl's body.

That transcends the concept of miracles.

boom--! ! !

The imaginary shadow, which could even cross the intersection of infinity and infinity, instantly overlapped with Hatsune Miku's body.

To return to oneness with her soul.

The girl opened her eyes.

Her pink eyes fixed on the enemy attacking her, and in an instant, she blew him away.

Boom————

The violent power transformed into a strong gust of wind, not only blowing away the super-powerful black ace in one breath, but also making it difficult for the red figure with its fortress-like heavy body to withstand it.

The red Joker tried its best to stay in place, but even with its thick armor, it was visibly retreating backward.

"This is…?"

Izayoi Sakamaki, Virgil, Dante.

The three stared blankly at the figure that was slowly floating into the air.

She is like a goddess.

Her signature azure twin tails remained unchanged, but—her clothes had changed.

Purple? Dark? Or perhaps floral?

In any case, the clothes, which were extremely close to flowers, clung to the girl's body, transforming her into a posture resembling a military uniform.

It looked like a Japanese military uniform from the Taisho era, a hundred years ago.

Long sleeves extended from the sides of both hands, while a military cap was worn on the top of the head.

Even her lower body was transformed into long boots and light purple stockings.

She slowly opened her eyes, revealing pale pink pupils that perfectly matched her aura.

A power and aura far surpassing previous levels burst forth from the deepest part of Hatsune Miku's soul in one breath.

It's just the sheer intensity of the aura.

It was already so powerful that everyone present had to take notice.

"Wow, that's amazing! Hatsune Miku, you've evolved to this extent!"

"That human... no, there was a completely different aura emanating from her...?"

"She's really not to be underestimated. This little girl looks so frail, yet she can wield such incredible strength?"

The black ace and the red joker rallied and directed their powers toward Hatsune Miku.

The girl realized this in an instant.

The Japanese sword that had been there before floated in front of her and she grabbed it in her hand.

This was leaked from inside the company.

It is a sharp longsword wrapped in cherry blossom petals.

"Senbonzakura... Let this filthy world be purified again."

Then, the girl raised the longsword named "Senbonzakura" and slashed it directly at the world before her.

Light is like that.

The immense pressure, which was originally beyond the level of a black hole, was directly sliced ​​open by a single sword strike.

boom! ! !

Hatsune Miku took a step forward and instantly arrived between the two bodies.

The black ace and the red joker were both a beat slower than her.

However, the Black Ace then moved even faster.

He raised his massive red sword, while the red ghost card clenched his right fist.

"This is bad, now is not the time to watch the show!"

Virgil and Dante immediately snapped out of their daze and swiftly charged toward the enemy.

Izayoi Sakamaki narrowed her eyes, stepped back, and clenched her right hand.