The English version is currently in development, but a demo version is available to play.

“Mr. Admin... do you remember who you are?”

I’m Parker Klein, Executive Officer of Division 2 at ZF Corporation.  
You’re the Head of Development in Division 1 — though after that little ‘incident’ a few years back, I hear some of your memories got scrambled.

I’ll keep this brief.

Three years ago, Earth was forever changed.
No one knows what caused it — some blame the sun, others say it was the planet itself turning against us.

But we do know what followed: the fall of nations, mass extinctions… and the rise of one last sanctuary.

Lucio City.

Built on Lucia Island after the Collapse, Lucio is the last autonomous megacity left — a symbol of survival, and control.

But beneath its glowing skyline lies a secret machine.

That machine… is you.

You are the Administrator, director of the Lucio City Security Bureau — a covert organization answering to no one but the City’s silent founders.

They say you lost part of your memory after the "incident" in Division 1.
But the city doesn’t care.

It just needs someone to hold the line.

Alongside the elite agents of the Security Bureau, who serve as your trusted aides, you will carry out your duties — and safeguard this unstable world.

"Each arc reveals a piece of the city’s truth."

A series of attacks shake the Treeper Ward’s most iconic building — the Department Store.

Amid chaos and rising public fear, the Bureau begins an investigation that leads to a truth even the agency wasn’t meant to uncover.

This episode features three characters from the Customer Center,

along with hidden figures from Treeper Department Store.

Together, they form a story of how they come together to protect Treeper.

Idol group Q.Seasons takes center stage — and so do the secrets surrounding their agency, SRC Entertainment, and national broadcaster LCBS.
When singer Yujin crosses paths with the Bureau, a story of loyalty, image, and manipulation begins to unravel.

Yujin, Satona, Jua, and Kylie form the four-member idol group Q.Seasons.

With the four seasons as their central concept, each member represents a unique charm:

the warmth of spring, the freshness of summer, the coolness of autumn, and the coziness of winter.

What is Lucio City hiding?
And why were you chosen to uncover it?

"We’re counting on you, Mr. Admin."

The story of Eternal ONE is divided into a main storyline and DLC episodes.
Each season offers exciting new stories, with even more content on the way!

[Main Story]
Part 1 – Service Center Arc
Part 2 – Dark Studio Arc
Part 3 – Coming Soon!

Feel like you're having a real conversation as characters react with a wide range of expressive emotions—more facial variations await as the story unfolds.

Eternal ONE provides regular updates to reflect new stories and content.

Through the update menu, you can download new episodes, limited-time events, bug fixes, and more.

Eternal ONE offers multiple routes and endings in each arc.

From true ending to bad endings, the story unfolds based on your choices.

You must overcome every false path and reach the true ending!

Each episode features stunning special CGs that heighten immersion and leave a lasting impression even after the story ends.

These visuals are key elements in the narrative of Eternal ONE, offering players a unique and moving experience through a rich variety of CGs.

Various in-game features make you feel as if you're truly working as the administrator of Lucio City.

Dive deeper into the world through interactive content like emails, chat systems, and more.

From Seoul to London to Tokyo — we’re a global team turning imagination into reality.

Our previous title, Beginning of the Rain, taught us more than just how to develop a game — it showed us how to grow with our audience.

We believe in building story-driven content that evolves through feedback, communication, and emotional connection.

Our games aren’t static; they’re living, growing experiences shaped together with the players.

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