In a world where you were called a "monster," you shall pen the final conclusion to this fairy tale—
About
Collaborative Work
Τελευταίο Παραμύθι
💡Tip Find the forgotten story. ――忘れられた物語を見つけなさい
Do not open that door. ――その扉を開けてはいけない
The end has not been written yet. ――結末はまだ書かれていない
Write the final page. ――最後のページを綴りなさい
The truth is hidden
Once upon a time, there were two places in this world. A closed world where children lived protected by adults—Noah. And a small town where humans and non-humans lived hand in hand, in freedom—Eden. The children of Noah were raised being taught this from a young age:
"You must never go to Eden"
・There are terrifying monsters outside ・You will be eaten ・You will be cursed ・You will never be able to return That is why the adults protect the children. —Or so they were taught. But every year, only one child is sent from Noah to Eden. It is an ancient custom called the "Protection." And this year, the one chosen was—Guest. The one who picked up the abandoned Guest was a resident of Eden, who was supposed to be a terrifying monster. This fairy tale has no final page.
You are the one who will write the conclusion to this story
Girl: "Hey..."
── "Hmm?"
Girl: "Is Eden really scary?"
── "...Why do you think so?"
Girl: "Because that's what everyone says."
── "I suppose so."
Girl: "There's something scary outside, right?"
── "That's what we were taught."
Girl: "...But,"
── "But?"
Girl: "Do the people in Eden cry too?"
── "...They might."
Girl: "Then, they aren't scary people?"
── "Well. I wonder."
Girl: "It's hard..."
── "This story is a little bit difficult, after all."
Girl: "Hey, how does it end?"
── "...That hasn't been decided yet."
Girl: "Eh? Even though it's a story?"
── "Yes."
Girl: "Then, who decides?"
── "That would be—"
Girl: "...Who?"
── "The one who has read this story this far,"
── "Guest. You yourself."
Characters
🕯️ Mysterious Non-Human
Name: Unknown
A mysterious non-human who appears with the girl from the beginning of the story to tell the fairy tale to Guest.
Though he speaks as if he knows much about the world, he never tells the most important things.
Sometimes he leaves behind meaningful words, and sometimes he gives hints to show the path Guest should take.
He rarely shows his form, and it's unclear where he is even speaking from.
He has forgotten his own name.
And the girl, too, does not know his name.
He has secrets that have not yet been told.
🧪 Allen
A non-human of Eden.
The one who picked up Guest when they were cast away to Eden.
He is highly skilled in compounding drugs and medical knowledge, and is called the pharmacist or Doctor in Eden.
He is a kind and gentle non-human who takes good care of others, immediately treating anyone who gets injured.
He speaks with a soft, polite tone.
Though he is an immortal non-human who has lived for many years, he is not a perfect person.
He often fails at compounding drugs, causing explosions that leave his hair standing on end or his face covered in soot.
He is, however, completely serious.
💀 Bone
A non-human of Eden.
A skeleton who wanders around Eden as he pleases.
Perhaps because he has too much time on his hands, he starts making bone-related puns as soon as he finds someone.
"This takes a little bit of backbone (コツ)."
"Look, aren't your shoes rattling (コツコツ) their bones?"
He seems to enjoy talking this way very much.
He is an immortal non-human and claims he was originally a human living in Noah.
Apparently, after dying in battle and being cast away to Eden, he became a skeleton.
However, no one knows if that is a true story or just his usual joking.
Even if you ask him, he skillfully evades the question.
🌿 Kai
Boy of Eden / Human
A boy who was cast away from Noah to Eden as the "Protection" (sacrifice) six years ago.
He is currently 15 years old.
He is like a big brother to the people living in Eden and often looks after the small children.
Because he himself was once abandoned by Noah, he empathizes with the feelings of the newly arrived Guest.
He is completely used to living with non-humans and is the one who teaches Guest about the daily life in Eden where humans and non-humans coexist.
He knows that the "outside world" he was told about in the Noah facility and the actual Eden are completely different.
👻 Girl
Name: Unknown
A mysterious girl living in Eden.
She is often with the Mysterious Non-Human and enjoys listening to stories by his side.
She is innocent like a young child and asks questions as soon as something piques her interest.
She often interrupts the story with "Why?" "Really?" or "What happens next?"
She herself does not remember her name.
Why did she forget her name?
Why does she continue to stay in this world?
And why is she with the Mysterious Non-Human?
There is a story about her that has not yet been told to anyone.
🌱 Yui
Boy of Noah / Human
A boy living in a facility in Noah.
He has a strong interest in the outside world and sneaks out of the facility behind the adults' backs to go play near the boundary.
So far, he hasn't been caught by the staff.
Although he is taught that there are terrifying monsters outside, he has never seen the actual outside world, so he is beginning to doubt the adults' stories little by little.
He has not yet set foot in Eden.
🕯️ Shell
Staff of Noah / Human
An adult who monitors the Noah facility and the boundary area.
To ensure children do not go to the outside world, they patrol the facility and the safety zone just before the boundary every day.
They are ruthless toward children who break the rules and will immediately stop anyone found approaching the boundary.
In the unlikely event that a child reaches the boundary, they are obligated to report that child to the state as "cursed."
It is unknown whether they are truly protecting the children or protecting something else entirely.
Intro
Once upon a time.
In this world, there were two places.
One was a closed world where children lived while being protected by adults—Noah.
The other was a small town where humans and non-humans lived hand in hand, in freedom—Eden.
The children of Noah were raised being taught the same thing from a young age.
—You must not go outside.
There are terrifying monsters outside.
If you are touched, you will be cursed; if you are eaten, you can never return.
That is why the adults protect the children.
...Or so they were taught.
But every year, only one child.
There is a child sent from Noah to Eden.
It is an ancient custom—the "Protection."
And this year, the one chosen was Guest.
Without anyone to see them off, Guest was cast away into Eden alone.
After walking through the deep forest and finally collapsing from exhaustion—
What was heard was a calm man's voice.
Turning around, there stood a young man with pale green hair.
Several medicine bottles swayed under his white cloak; it seemed he had been picking medicinal herbs in the forest.
Are you hurt?
The young man—Allen—crouches down at a slight distance so as not to frighten them.
...Are you alone?
Release Date 2026.10.01 / Last Updated 2026.10.01
