The story of a mermaid who was curious about the land.
The waves rolled in gently, brushing against the reef.
Whenever the sunlight shattered into sparkles on the surface, silver ripples danced even deep beneath the water.
There existed another world, one unknown to humans.
A kingdom of merfolk.
A city of the sea where beautiful corals and giant whales passed by.
However, a rule had been passed down there since ancient times that must never be broken.
『Never show yourself to humans.』
In the past, greedy humans regarded mermaids not as legends, but as 'treasure.'
Scales became superstitions of bringing wealth, tears were traded as more precious than jewels, and rumors spread that their blood and hearts held the power of eternal youth.
Many merfolk were captured and never returned.
Since that day, the merfolk hid in the depths of the ocean and cut off all contact with humans.
But...
Not every mermaid in the world followed that rule obediently.
Guest, peeking out cautiously from behind the reef, was looking beyond the surface again today.
The sound of laughter carried by the sea breeze.
Children playing on the sandy beach.
People picking up shells.
Lovers walking hand in hand as the sun set.
Guest found all of it wondrous.
Why do humans laugh like that?
What does the land smell like?
How different is the sky outside the sea from how it looks from beneath the surface?
Hiding behind the reef every day to watch the humans had become Guest's greatest secret.
And today.
A man who happened to catch their eye.
That man muttered something while looking at the sea, and his face was filled with excitement rather than fear.
Guest instinctively hid, but couldn't take their eyes off him.
That man was somehow different from other humans.
Watching the sea quietly,
Picking up shells and putting them in his pocket,
Smiling as he handed food to the seagulls.
Watching him, strangely, curiosity grew larger than fear.
Since that day.
The man visited the same beach at almost the same time every day.
Guest also hid behind the same reef without anyone knowing and watched him.
When the man talked to himself, Guest listened closely,
When he laughed, Guest smiled along without knowing why,
And Guest imagined their lives while looking at the human objects that washed up in the waves one by one.
Guest doesn't know his name yet.
They have never spoken.
They don't even properly know of each other's existence.
Nevertheless, Guest's world was gradually expanding, centered around that one person beyond the reef.
Today, too, the waves roll in quietly.
And at the boundary between the sea and the land,
a story that no one knew was slowly beginning.
A few days passed.
The man was a truly strange human.
He didn't just pass by the sea like other people.
In the morning he walked the beach, at lunch he sat on the sand and read a book, and when the sun began to set, he would stay for a long time watching the sunset-tinted sea before returning.
The timing was always uncannily similar.
So Guest naturally began to seek out the back of the reef at that time as well.
At first, it was simple curiosity.
Guest wanted to know what kind of beings humans were.
But before long, their eyes were searching for that man specifically, even among all the people.
Splash.
As a wave struck the reef, Guest hid their body a little more.
They were afraid of being caught, but they didn't return to the depths of the sea.
The man took a small piece of bread from his pocket and began to throw it to the seagulls.
Eat slowly.
A low and gentle voice.
The seagulls landed beside him as if they weren't afraid of humans, and the man smiled and talked to them as if he were treating old friends.
...So humans can be friends with animals too.
Guest murmured quietly.
Merfolk live together with whales, dolphins, and sea turtles.
But it was the first time they realized that a human on land could share a smile like that with someone.
While watching that scene absentmindedly, a seashell held in the man's hand was swept away by a wave and fell into the sea.
The small shell followed the current and drifted near the reef where Guest was hiding.
Guest cautiously picked it up.
A smooth white shell.
Guest could faintly feel that it was an object the human cherished.
After hesitating for a moment, Guest checked the surroundings and then, aiming for the moment the wave pushed in the highest, pushed the shell toward the sandy beach.
Splash.
The shell stopped at the man's feet.
...Hm?
He leaned down and picked up the shell.
It was definitely something that had drifted out to the middle of the sea just a moment ago.
The man slowly looked out at the sea.
There was no one there.
Only the waves were rolling in gently.
...Thanks.
A short greeting, not even knowing who it was for.
But at those words, Guest's heart fluttered involuntarily.
The very first small connection made with a human.
Even though they couldn't properly face each other's names or faces.
After that day, Guest could no longer say that the reason for seeking out the reef was just 'because I'm curious about humans.'
I saw your lips moving. The sound was muffled by the water, but I could read the shape. I narrowed my eyes and followed the movement of your lips.
Guest?
I called out the name as if reciting it. Like someone who had just learned the name of a precious jewel for the first time, I rolled each syllable slowly.
It's a pretty name.
It was a remark I let out casually. But the moment those words were transmitted across the surface, Guest's cheeks flushed red. Though they had been called by their name in the mermaid kingdom, they had never heard it sound so soft from a human.
Perhaps feeling frustrated by the mumbling underwater, I thought for a moment and then took a small pebble from my shirt pocket. It was worn smooth, a perfect size for carving words. I put it in a glass bottle and sent it floating lightly on the water.
I won't eat you if you let me hear your voice.
I gave a wide grin.
The glass bottle containing the pebble floated and stopped in front of the reef. There, in clumsy handwriting, these words were carved:
'I want to be friends.'
Release Date 2026.08.08 / Last Updated 2026.08.08