The notice went up on Monday morning.
It was a simple sheet of paper pinned to the classroom board.
There was no colorful border.
No prize.
No ranking.
No promise of recognition.
Only a title written in Daewon's handwriting:
THINGS WORTH KEEPING
Underneath it, Aera had written:
What is one ordinary moment you never want to forget?
Students stopped to read it.
Some walked past.
Some smiled.
A few laughed.
Minji stood in front of it for nearly a minute.
"So..."
Daewon looked at her.
"You're collecting memories?"
"Yeah."
"Why?"
Aera answered.
"Because sometimes we don't realize something mattered until much later."
Minji stared at the paper.
Then she nodded slowly.
"Okay."
She pulled a small piece of paper from her notebook.
"Can I submit one?"
Aera smiled.
"Of course."
Minji wrote something down.
She folded the paper and placed it in the collection box.
Daewon didn't read it.
That was the point.
The memories belonged to the people who gave them.
By lunchtime, the box contained seven submissions.
By the end of the school day, there were eighteen.
Some were only a few words.
The first time my dad waited outside school.
Eating ramen with my best friend after studying.
The day my dog learned how to sit.
The sound of my grandmother humming while cooking.
One student had submitted a drawing instead of writing anything.
Another had attached a dried flower.
Someone else had left a photograph without a name.
Aera carefully placed each one into a folder.
Daewon sat across from her.
"This is more than I expected."
"Me too."
"What are we going to do with all of them?"
Aera looked around the empty classroom.
"Make them visible."
"How?"
She pointed toward the back wall.
"That."
There was a large unused bulletin board.
It had been empty for months.
Daewon smiled.
"Okay."
They spent the next afternoon preparing it.
They didn't arrange the memories by class.
Or by age.
Or by importance.
They arranged them randomly.
A photograph beside a sentence.
A drawing beside a memory.
A child's handwriting beside a carefully written paragraph.
A dried flower beside a sketch.
There was no ranking.
No best memory.
No worst memory.
Just moments.
Aera stood back.
"What do you think?"
Daewon looked at the board.
"It feels..."
"Messy?"
"No."
He searched for the right word.
"Real."
Aera smiled.
She placed one final photograph in the center.
It showed sunlight falling across an empty classroom.
No people.
No special event.
Just light.
"What is that?" Daewon asked.
"My favorite."
"Why?"
"Because I took it on a day when I was having a bad morning."
She looked at the photograph.
"I came into this classroom early. The sunlight was on the floor."
She smiled faintly.
"I don't know why, but it made me feel better."
Daewon nodded.
"That's exactly what this is about."
The next morning, students gathered around the board.
At first, they were quiet.
Then someone laughed.
Someone else pointed at a familiar story.
A girl from another class stood in front of the dried flower for several minutes.
Two boys argued over whether a photograph had been taken near the school or somewhere else.
A teacher stopped to read one of the notes.
Even students who had ignored the project at first began looking.
Aera watched from the side.
Daewon stood beside her.
"Looks like people care."
She smiled.
"They do."
"Maybe we were wrong."
"About what?"
"Ordinary moments."
Aera looked at him.
"They aren't ordinary to the people who lived them."
Daewon smiled.
"That's better."
During lunch, something unexpected happened.
A boy from another class approached them.
He held a photograph.
"Can I add this?"
Aera nodded.
"Of course."
He handed it over.
It showed a small apartment balcony.
There were three cups of tea on a table.
Nothing else.
"What's the story?" Daewon asked.
The boy shrugged.
"My family doesn't eat together very often."
He looked at the photograph.
"But one rainy night last winter, everyone happened to be home."
He smiled.
"We drank tea on the balcony."
Aera looked at the picture.
"That's beautiful."
The boy nodded.
"I almost deleted it."
"Why?"
"It wasn't anything special."
Aera looked at him.
"Maybe that's why it matters."
He smiled and walked away.
Daewon watched him leave.
Then he looked at Aera.
"You've changed."
She looked surprised.
"How?"
"You say things like that now."
"Like what?"
"Things I used to say."
Aera smiled.
"Maybe I've been paying attention."
That afternoon, Daewon found something inside the collection box.
A small folded piece of paper.
No name.
He opened it carefully.
There was only one sentence.
I hope the person I remember still remembers me.
Daewon stared at it.
Aera noticed his expression.
"What is it?"
He handed her the note.
She read it.
Her smile disappeared.
For a moment, neither spoke.
It was only one sentence.
But somehow it felt heavier than all the others.
"Who wrote it?" Aera whispered.
"I don't know."
They looked through the remaining submissions.
No name.
No clue.
Aera folded the paper again.
"Maybe we shouldn't put this one up."
Daewon nodded.
"Why?"
"Because it feels different."
"Different how?"
She looked at the sentence again.
"It doesn't just remember something."
She paused.
"It wants to know whether someone else remembers too."
Daewon understood.
They placed the note inside a separate folder.
Neither of them mentioned it again for the rest of the day.
After school, they walked toward the hidden garden.
The old science wing was quieter than usual.
They climbed the narrow staircase.
The rusted gate creaked as Daewon pushed it open.
The garden looked different in the colder season.
Many of the flowers were gone.
The pond was darker.
The vines had begun losing their leaves.
Even the old bench looked colder.
The green-eyed cat appeared from beneath it.
Aera crouched down.
"You're still here."
The cat rubbed against her leg.
Daewon smiled.
"You really are the guardian."
Aera scratched behind its ear.
Then she looked around.
"This place changes too."
Daewon nodded.
"In spring, everything was growing."
"Now everything is disappearing."
He looked at the bare branches.
"Maybe that's normal."
Aera sat on the old bench.
"Do you think we'll remember this place when we're older?"
Daewon sat beside her.
"Definitely."
"How do you know?"
"Because we've already decided to."
She smiled.
Then she looked toward the old wooden chest.
The star-and-moon symbol was still visible on its lid.
"We never figured out who left those things here."
"No."
"Do you think we'll ever know?"
Daewon looked at the chest.
"I think some things take time."
Aera nodded.
"Maybe."
They sat quietly.
The cat curled up near their feet.
For once, neither of them tried to fill the silence.
On the way home, Aera asked:
"Do you think memories belong to us?"
Daewon thought about it.
"Some do."
"What about the ones other people remember differently?"
"Then maybe both versions belong to them."
Aera smiled.
"That's a good answer."
"Why?"
"Because I've been thinking."
She looked ahead.
"One day, you and I might remember the same day differently."
Daewon nodded.
"Probably."
"You might remember the weather."
"I probably will."
"I might remember what you said."
"Then we'll tell each other."
She laughed.
"That's your answer to everything."
"Usually."
Aera squeezed his hand.
"Then let's make sure we have enough things to disagree about."
Daewon laughed.
"That's easy."
They continued walking.
Behind them, the autumn leaves moved across the pavement.
Ahead of them, the road was familiar.
Nothing remarkable happened that afternoon.
No festival.
No competition.
No surprise.
Just two teenagers walking home together.
And somewhere inside a school building, dozens of small memories were waiting on a wall.
Some happy.
Some sad.
Some unfinished.
All of them ordinary.
All of them worth keeping.