"You're right… I overlooked that detail."
Kyōraku Shunsui let out a long sigh, tilting the sake cup lightly in his hand.
He understood it clearly now.
From the beginning, the issue had never been about status alone
But about existence itself.
The division between Seireitei and Rukongaiwas not merely a social boundary.
It was, at its core, a difference in spiritual environment.
Seireitei, constructed from densely packed Reishi, possessed a far higher concentration of spiritual particles than the outer districts.
For Shinigami, this was ideal.
Their bodies, composed and reinforced by Reiryoku, could naturally withstand such pressure. In fact, prolonged exposure often refined their spiritual power and improved their control.
But for ordinary souls
For Pluses with little or no spiritual power
It was another matter entirely.
Living in an environment saturated with high-density Reishi was akin to constant pressure on the soul itself.
At first, the effects were subtle.
Fatigue.
Weakness.
Instability.
But over time, the imbalance would accumulate.
The soul, unable to adapt, would begin to deteriorate.
And eventually
Collapse.
"In Rukongai, even ordinary souls can exist for a long time," Shunsui murmured.
"Their lifespans aren't short."
"But in Seireitei… that time gets compressed."
Gosuke Shigure nodded faintly.
"That's the price."
Shunsui took a slow drink, his gaze drifting.
"Love really is troublesome."
He did not believe that Kuchiki Byakuya was ignorant of this truth.
Nor did he think Hisana was unaware.
And yet
They chose it anyway.
A brief, fleeting happiness.
Even knowing the ending.
Unconsciously, Shunsui's thoughts wandered to his own past.
To his elder brother.
To the Ise family's curse.
Even knowing the consequences, his brother had chosen love.
And paid the price.
Gosuke Shigure said nothing more on the matter.
Instead, his thoughts shifted elsewhere
Toward the future.
Unlike others, he understood one thing clearly:
The world of Bleach was never truly at peace.
Beneath the calm surface, dangers were always gathering.
Waiting.
He did not reveal everything he knew to Urahara Kisuke.
Some knowledge simply could not be explained.
But that did not stop him from acting.
Through indirect suggestions and carefully framed ideas, Gosuke guided Urahara toward developing certain tools and technologies.
Urahara, for his part, showed great enthusiasm.
Even without understanding the full purpose, he enjoyed the process itself.
After all
His mind thrived on curiosity.
And invention.
Thus, while the surface of Soul Society remained calm
Preparations quietly advanced in the shadows.
Time passed.
Days turned into months.
Months into years.
As expected
Hisana's condition worsened.
At first, it was only weakness.
Then illness.
Then prolonged confinement to bed.
The cause was exactly as predicted.
Her soul could not endure the spiritual density of Seireitei.
Gosuke Shigure heard of her condition.
But he did not intervene.
There was no meaningful connection between him and the Kuchiki family.
Beyond a few distant interactions with Kuchiki Ginrei, there was no personal bond.
As for Byakuya
They were, at most, strangers.
And more importantly
There was little he could do.
The difference between a Shinigami and a Plus was fundamental.
It was not merely a matter of healing.
It was a matter of structure.
Perhaps someone like Urahara Kisuke or Kurotsuchi Mayuri could have attempted to prolong her life through research.
But such work required time.
Experimentation.
Preparation.
By the time the problem became critical
It was already too late.
In the end
Hisana died.
Her death was quiet.
Almost unnoticed by the wider Soul Society.
But for one man
It changed everything.
After her passing, the final trace of warmth within Kuchiki Byakuya seemed to fade.
What remained was the perfect noble.
Cold.
Composed.
Unyielding.
Not long after, Kuchiki Ginrei formally relinquished his position as head of the Kuchiki clan.
The responsibility passed completely to Byakuya.
From that moment on
He bore everything.
But deep within
One promise remained.
To find Rukia.
Hisana's younger sister.
Years passed in search.
Without result.
Until
One day
A girl entered the Shin'ō Academy.
Her name
Rukia.
The moment Byakuya saw her
He knew.
There was no need for proof.
Her appearance alone was enough.
She was Hisana's sister.
And so
Byakuya made another decision.
One that once again defied noble convention.
He adopted her.
Not as a daughter
But as his younger sister.
Among the nobility, adoption was not uncommon.
But this
This was different.
The head of the Kuchiki clan personally bringing in a Rukongai soul
And granting her equal standing as family
It caused a quiet but undeniable stir.
Yet no one opposed it openly.
Byakuya's authority was absolute.
And the Kuchiki clan stood at the peak of noble society.
As for Rukia
She had no real choice.
Her name changed.
Her status changed.
Her world changed.
From that moment on
She became Kuchiki Rukia.
Within the Shin'ō Academy, her presence quickly drew attention.
Not only because of her new identity
But also because of her ability.
At the same time, a number of talented individuals rose together.
Among them:
• Abarai Renji
• Kira Izuru
• Hinamori Momo
• Kuchiki Rukia
They would one day become the backbone of the Gotei Thirteen.
But for now
They were merely students.
Standing at the beginning of their paths.
However
Fate did not wait for them to grow slowly.
During a standard training exercise
An event occurred that would leave a deep mark on all of them.
A Soul Burial (Konsō) field exercise.
This was a required practical mission for upperclassmen.
Through performing Soul Burial in the Human World, students would learn:
• The duty of guiding Pluses
• The responsibility of purifying Hollows
• The reality of a Shinigami's role
It was meant to be safe.
Controlled.
Routine.
But this time
Something went wrong.
During the mission
They encountered an unexpected threat.
A large-scale Hollow attack.
And in that moment
The line between training and reality
Was completely erased.
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