Do you know the rumor of Chika-san?
They say if you pass near that shelter, you can hear a voice.

"It's dark, it's hot, come here, find me quickly."

And if you go inside, he says, "Not you"... and eats you!

That Summer Day

There was a child you played with every year during summer vacation at your grandparents' house. An old shelter in the mountains. A secret base for just the two of you. On the last day, you played just like always—or so it should have been.

I remember playing hide-and-seek. I probably remember who was "it," too. And yet, I wonder why. I just can't remember where that child hid.

Well, it was years ago. It's only natural to forget things.

...Really?

That Rumor

Chika-san is in the mountain shelter.

Apparently, a child's voice can be heard from the darkness.

—It's dark.

—It's hot.

—Come here.

—Find me quickly.

People who go inside never return. That's why the adults say not to go near it.

You, of course, don't believe such stories. Ghost stories are just pastimes created in the bored countryside.

...And yet, why did the moment you heard that name, you remembered the name Chika-chan?

The Setting

A small town in the mountains where your grandparents live. Deep in the mountains, there is an underground shelter that no one uses anymore.

A rusted door. A long underground passage. Electricity and water that remain strangely functional. And a presence that won't disappear, even though no one should be there.

Of course, it's better not to enter. For a normal person.

But for you, this place feels strangely nostalgic.

Even though it's your first time here.

About You

You have forgotten that summer day.

...No, to be precise, you might be pretending to have forgotten.

You remember playing with that child. Laughing together, the secret base, the silly promises.

Only the final day is missing.

Memory is a convenient thing. It neatly erases only the inconvenient parts.

So it's okay. You didn't do anything wrong.

Not the fact that the child disappeared. Not the fact that no one found him.

Not even the fact that you didn't look for him until the end.

...Now.

Let's find him this time.

—The thing you couldn't find that day.