The P.S.A. headquarters was quieter than usual.

An official announcement had been sent to all employees:

«“Due to recent circumstances, all employees will be granted one week of leave.”»

Most of the employees didn't know the real reason behind it.

But Sako didn't care much.

All he needed was some peace.

---

He left the organization’s headquarters and headed home.

Along the way, rain began to fall.

Sako stopped for a moment beneath a nearby awning.

The smell of rain...

Something so simple, yet it brought back an old memory.

A memory of his mother.

He had been only five years old.

He was sitting beside her in the kitchen while she placed toast on the table.

“Sako, don't eat so fast.”

The little boy smiled.

“I’m hungry.”

His mother laughed.

“I know.”

Then she placed a small cup in front of him.

“When you grow up, you’ll make breakfast for me.”

Little Sako nodded enthusiastically.

“I promise.”

Then—

The scene changed.

The sound of brakes.

A scream.

A blinding white light.

Then darkness.

Sako suddenly opened his eyes.

He was standing in the street.

He didn't know why he had stopped.

But he felt a strange heaviness in his chest.

“...Mom.”

The word was rarely spoken by him.

He continued walking.

---

Several hours later...

Sako was sitting on an old bench inside a small park.

There was almost no one around.

He closed his eyes.

And suddenly...

Another image appeared in his mind.

This time, it wasn't his mother.

It was him...

A small child running through a green field.

Beside him was a little girl.

She was laughing while holding a small ball in her hands.

“Sako! Hurry!”

The little boy ran after her.

“Wait!”

The girl laughed.

“If you catch me, I’ll give you something!”

Sako stopped.

“What?”

The girl pulled a small flower from behind her back.

“This.”

Sako looked at it in confusion.

“Why?”

She smiled.

“Because you always look sad.”

The boy fell silent.

Then he took the flower.

“Thank you.”

The girl laughed softly.

“Don’t forget me when you grow up.”

---

Sako opened his eyes.

He was breathing slowly.

The memory disappeared.

But one thing remained.

The girl's face...

It was unclear.

Her name...

It felt so close to his memory.

Yet no matter how hard he tried, he couldn't remember it.

He placed a hand on his head.

“Who was she...?”

At that moment, a drop of rain fell onto his hand.

Sako looked up at the sky.

Then he noticed something strange.

On his wrist...

A small mark had appeared.

A circle with a number in the center:

0

Sako froze.

The mark disappeared after a few seconds.

But he couldn't shake the feeling that something was wrong.

---

That evening, he returned home.

He turned on the television and placed a cup of coffee in front of him.

But this time...

He couldn't focus on the news.

Three things occupied his mind:

Subject 0.

His regeneration.

And the girl he had forgotten.

He slowly lifted his cup.

Then whispered to himself:

“...What happened to me when I was a child?”

Outside his window...

Someone was standing on the opposite side of the street.

Watching his house in silence.

And in their hand...

Was an old photograph.

A photograph of two children.

Sako...

And the little girl.