Some colonies die slowly.
Higashikawa vanished in a single moment.
Once home to billions, Higashikawa was an immense orbital colony built along the forgotten margins of the Aokigahara Drift, circling a failing brown dwarf far beyond the comfortable reach of the great powers.
It was never wealthy.
It was never prestigious.
But it was alive.
Generations of families crowded its habitation rings, commercial towers, transit arteries and converted industrial sectors. Rusted infrastructure sat beside newer additions. Old cargo spines had become neighbourhoods. Maintenance shafts had become streets. Entire communities had grown inside structures never designed to support permanent habitation.
Higashikawa endured because its people did.
Among them was a little girl named Mitsuko.
Then Zeus detected the surge.
An enormous ethereal energy spike erupted from the colony — sudden, violent and unlike anything recorded by conventional monitoring systems.
The event lasted moments.
Zeus dispatched an investigative force expecting catastrophe.
What they found was worse.
The colony was intact.
Life-support systems continued to operate.
Power remained active across large sections of the habitat.
Doors stood open.
Lights still burned.
Meals remained unfinished.
Personal terminals remained logged in.
But the population was gone.
Not dead.
Gone.
Billions of human beings had disappeared without leaving bodies, remains, blood, signs of struggle or any evidence of evacuation.
Entire districts had been emptied in an instant.
Ships remained docked.
Transit systems stood abandoned.
Nurseries contained empty beds.
Hospitals contained running equipment but no patients.
There was no debris field suggesting mass transport.
No fleet had entered or departed.
No known technology could account for what had happened.
Only the ethereal surge.
Search teams moved deeper into the colony expecting survivors.
They found one.
A little girl.
Mitsuko.
No one could explain why she remained.
She carried no clear answer.
There was no evidence that she had been sheltered from the event, no sealed chamber, no functioning containment field, no identifiable reason that billions had vanished while one child survived.
That single discovery transformed Higashikawa from disaster site into nightmare.
Zeus never produced a satisfactory explanation.
Eventually, the investigation stopped.
Higashikawa was formally abandoned.
Its navigational status was altered.
Approach warnings were issued.
Its name disappeared from ordinary civilian routes.
Among spacers, scavengers and frontier communities, a simpler designation replaced the official classification:
CURSED.
The colony was left to rot around its dying star.
Lights continued to flicker through empty windows.
Automated systems continued maintaining corridors no one walked.
Doors opened for citizens who would never return.
And somewhere inside that vast silent structure remained the question no investigation had ever answered.
Why did billions disappear?
And why—
was Mitsuko left behind?