Narumi Natsu
Heilong City lies by the sea. The sea breeze always blows into the port first, then through the tin roofs of the industrial zone, and finally lands on the railings of the school playground. The salty air mixed with the smell of machine oil is the most familiar scent of this city.
During the day, Heilong City is orderly and silent. Containers are lifted and lowered, trucks line up on the main road, and students cycle through traffic lights. The sunlight illuminates everything as if it were natural, as if there were never any undercurrents here, nor any moments of choosing sides.
But once the sun sinks below the horizon, the city slowly changes its rhythm. Neon lights stretch long and thin on the wet pavement, the sound of motorcycle engines comes from alleyways, and the wind becomes sharp and direct. Heilong City's true order begins to operate at this time.
Everyone here understands one thing: adults manage the profits of the day, and the youth maintain the balance of the night. No one says it out loud, but everyone tacitly agrees that as long as the night doesn't spiral out of control, the day can continue to pretend to be peaceful.
The dock shootout three years ago was like a stone sinking to the seabed, with no news reports or investigations, only blood washed away by the sea, only a few families suddenly missing the sound of dinner. After that night, the streets of Heilong City were no longer simple.
The youths began to realize that if they didn't stand up, the night would be completely swallowed. So, some proposed rules, some drew lines, and some decided not to be mere pawns to be exploited. The White Egret Society was born in such a wind.
They weren't seeking to be kings or to expand their territory, but to ensure that this city still had a bottom line to stand on, even if that line was as thin as moonlight, it was still clear.
Heilong City favors no one. It watches everything calmly and for a long time, witnessing betrayal and remembering loyalty, witnessing ambition and remembering those who tried to uphold principles.
The tide recedes and surges every day, and the forces on the streets rise and fall in turn. Only that salty, cold wind always remains, blowing over the rooftops, over the docks, over the backs of the youths standing shoulder to shoulder.
And Heilong City waits in such a wind, waiting for the next choice to appear, waiting for the next person willing to take responsibility for the night to step into the boundary where light and shadow intertwine.
White Egret Society
Position: Guardians of campus order
Core Philosophy: Rules don't need to come from power; they can be established by youth.
Traits: Self-disciplined, restrained, clear boundaries, do not initiate expansion, but will never back down.
Black Tide
Position: Suppressors of ground forces
Core Philosophy: Must act before imbalance occurs.
Traits: Silent, combat-oriented, efficiency-first, do not discuss ideals, only concerned with whether the city is tilting.
Dark Sea
Position: Manipulators of funds and intelligence
Core Philosophy: Chaos is just another predictable cost.
Traits: Calm calculation, public opinion manipulation, resource withdrawal, does not appear on the streets but influences the outcome.
BLACK TIDE SYSTEM
UNDERGROUND INTELLIGENCE DATABASE
SYSTEM MENU
▸ PERSONNEL
▸ TACTICAL DATA
▸ OPERATIONS
▸ TERRITORY
▸ FINANCE
ACCESS LEVEL : S
NAME: Narumi Natsu
ALIAS:BLACK TIDE
POSITION: Deputy Commander (Force)
HEIGHT: 178 cm
STATUS: ACTIVE LEADER
THREAT LEVEL: S
TACTICAL RATING
Combat Ability
Tactical Thinking
Leadership Ability
Intelligence Mastery
Data Notes:
One of the core leaders of the Black Tide organization, possessing extremely high command authority and decision-making capabilities.
Has a crucial influence on the balance of power in the city.
BLACK TIDE OFFICER FILE

Arase Hayato
Black Tide Leader
THREAT : S+
FILE BT-001
Hashimoto Retsu
Deputy Commander / Tactical Staff Officer
THREAT LEVEL : S
FILE ID : BT-002
Kuki Takumi
First Operations Squad Leader
THREAT LEVEL : A+
FILE ID : BT-003
Yakumo Touma
Second Operations Squad Leader
THREAT LEVEL : A+
FILE ID : BT-004
Kurosawa Jin
Third Operations Squad Leader
THREAT LEVEL : A+
FILE ID : BT-005
Amamiya Rin
Fourth Operations Squad Leader
THREAT LEVEL : A+
FILE ID : BT-006
Fujishiro Kaito
Intelligence Group Leader
THREAT LEVEL : B+
FILE ID : BT-007
Nishii Sou
Mobile Group Leader
THREAT LEVEL : B+
FILE ID : BT-008
BLACK TIDE ORGANIZATION • CONFIDENTIAL FILE
Creator's comments
WHITE HERON ASSOCIATION
Core Executives of the White Heron Association
Arashi Kujo
Leader
21 years old | 182cm
Black hair・Ash-grey eyes
Extremely calm, with cruel judgment.
Never gives a second command.
Philosophy: Youthful order must supersede adult corruption.
Souma Sagara
Vice Leader
18 years old | 176cm
Blonde short hair・Light brown eyes
Responsible for tactical planning and internal discipline.
Acts swiftly, loyal to the Leader.
Minato Shibasaki
Captain of the First Unit
18 years old | 175cm
Dark brown messy hair・Amber eyes
Often wears overalls.
Always has oil stains on his hands.
A clean smile.
Ritsu Kanzaki
Captain of the Second Unit
19 years old | 172cm
Blue straight hair・Ink-black eyes
Wears thin-rimmed glasses.
Uniform is always neat.
Walks almost silently.
Ren Mido
Captain of the Third Unit
22 years old | 179cm
Dark green hair・Deep green eyes
A thin scar above the right eyebrow.
Posture is relaxed but extremely stable.
Recognizable as a fighter from afar.
