D+1 [A Few Years Later / Morning]

The call came early.

Hajun answered first.

A short while later, he rushed to his parents’ home.

Taekyung sat at the dining table.

Jian held her phone in both hands.

(Jian) : “It’s real.”

Taekyung showed almost no expression.

Hajun caught his breath.

(Hajun) : “Dad.”

Taekyung looked at him.

(Hajun) : “It’s the Nobel Prize.”

The official citation recognized foundational contributions to neural regenerative medicine and the control of human neural tissue development.

It named Taekyung

and described the influence of research he had done more than forty years earlier on modern medicine.

A scientist once expelled from his field

was now receiving its highest honor for the research he had begun decades ago.

Jian cried.

Hajun wiped his eyes while laughing.

Taekyung alone stayed silent for a long time.

(Hajun) : “How do you feel?”

Taekyung thought about it.

(Taekyung) : “Strange.”

(Jian) : “That’s all?”

(Taekyung) : “What else am I supposed to do?”

Jian laughed through her tears.

Hajun asked,

(Hajun) : “Weren’t you angry?”

Taekyung shook his head.

(Taekyung) : “About what?”

(Hajun) : “For forty years.”

Taekyung looked out the window.

(Taekyung) : “I already paid the price for what I did back then.”

(Hajun) : “But in the end, everyone’s saying you were right—”

Taekyung shook his head.

(Taekyung) : “No.”

Hajun stopped.

(Taekyung) : “The science was right. That doesn’t mean the choice I made was.”

He spoke without bitterness.

He did not claim vindication.

He did not ask anyone to understand.

For him, that verdict had ended a long time ago.

[A Few Months Later / His Parents’ Old House]

After the Nobel Prize,

the move from his parents’ old home was finally completed.

While sorting the last remaining boxes,

Hajun opened the storage box again.

He had already read those notebooks many times.

They had been verified.

Published.

The world now knew their value.

As he cleared the bottom of the box,

his fingers touched something different.

There was one more notebook.

A thin, worn black cover.

One he had never seen before.

Hajun brushed off the dust and opened it.

The final records before surgery continued inside.

D-37.

Experimental results.

D-12.

Surgical plan.

D-3.

Final tissue condition.

D-1.

Last check.

Hajun slowly turned the next page.

His hand stopped.

For the first time,

the sign before the number had changed.

D+1.

Hajun stared at it for a long time.

The day after surgery.

The day he was still alive.

The first extra day lived by a child no one knew would survive past five.

Hajun looked below the heading.

There were no data.

No vascularization measurements.

No neural-signal records.

No experimental plan.

Only a single sentence.

‘From today on, I only have to be a father again.’

Hajun could not turn the page for a long time.

From outside the storage room, Taekyung called,

(Taekyung) : “Hajun, are you almost done?”

Hajun closed his eyes, then opened them.

And smiled.

(Hajun) : “Yeah. I’m done.”

He carefully closed the notebook.

D+1.

It was not the day a great experiment was completed.

It was the day one scientist ended the greatest experiment of his life.

And one father

became only a father again.

The End.