Its mysterious town is located on a hill.

At the very top of that hill,
there is a small beautiful orange mailbox like a morning glow, or like a sunset,
like when a light is flickering.

The people who live in the town know that those mailboxes are different from ordinary mailboxes.

In fact, the letter you posted in that mailbox will be returned to you a year later.

The residents of that town
write letters to themselves a year from now and deposit them in that mailbox several times a year.

On an ordinary day,
To my future self,
”How are you doing?" or
"Have your dreams come true?" or like
At the beginning or end of the year,
"You worked hard all year," or
"Good job!" to future self at the end of the year.

Sometimes, people write a letter and send it the day after a heartbreak or
the day after a project they worked hard on ends with great success.

There is another thing that everyone who lives in that town knows.

That is, when writing such a letter and,
A year later, when the letter arrived,
for some reason they feel very happy.

Perhaps, when we write letters imagining the future,
we hope that the future will be better than the present,
that it will be peaceful, and that it will be filled with happiness.
Maybe that's why we feel happiness.

No one knows what the future holds.

Then, for now, let's fill them with as much hope and happiness as we can.

Writing a letter to your future self is
filling the future with hope and happiness.
Maybe everyone in town knows it, somewhat subconsciously.

The post boxes to which such letters can be posted are called