The change is subtle at first.
So subtle that Ha Jun almost believes it is his imagination. He still wakes up. Still showers. Still leaves the house on time. Still smiles when spoken to. Still nods politely and answers questions with the right amount of warmth.
But something underneath him has shifted.
His smile does not come as easily anymore.
It lingers a second too long before forming, like his face has to search for it. Sometimes it arrives late. Sometimes it fades too quickly. Sometimes it never quite reaches his eyes.
His friends are the first to notice.
Not because they are especially perceptive, but because they are used to him being present in a very specific way. Ha Jun has always been the calm one. The listener. The boy who laughs softly at the right moments and never demands attention. The one who reassures others without ever asking to be reassured.
Now he listens, but his gaze drifts.
He laughs, but the sound feels hollow.
He responds, but sometimes too slowly.
"Are you tired?" one of them asks during lunch.
"I am fine," Ha Jun answers automatically.
But his voice lacks conviction.
He pushes food around his tray more than he eats it. His appetite comes and goes without warning. One bite feels like too much. The next moment he realizes he has barely touched anything.
Someone jokes about exams. Another complains about assignments. Ha Jun nods along, but the words wash over him without landing. His thoughts are somewhere else, heavy and unfocused, circling the memory of cold tiles and shaking hands and his sister holding him like he was made of glass.
At school, the teachers notice next.
They do not know his story. They only see patterns.
They see a student who used to sit upright now leaning heavily against his desk. They see dark shadows under his eyes that no amount of rest seems to erase. They hear his answers grow shorter. Less confident. Still correct, but spoken as if they cost him something.
One teacher pauses mid lecture and studies him for a moment longer than necessary.
"Ha Jun," she says gently, "are you sleeping well?"
A few heads turn.
He straightens immediately. "Yes."
The word feels too sharp in his mouth.
She nods but her eyes linger, concerned. "If you need anything, come see me."
He bows his head politely, gratitude and shame mixing uncomfortably in his chest.
By the end of the day, his body feels heavy. Not physically ill, just worn thin. Like his bones are tired of holding him upright.
He walks slower than usual.
He forgets to check his phone.
He almost misses Ji Hye standing near the gate.
She sees him before he sees her.
She always does.
Her eyes narrow slightly as she watches him approach. She notices the way his shoulders are tense. The way his steps lack rhythm. The way his expression shifts when he finally spots her, surprise flickering before a carefully constructed smile settles into place.
"Hi," he says.
"Hi," she replies.
They walk together in silence for a few moments.
Ji Hye does not fill it immediately. She has learned that silence speaks louder with him.
"You look tired," she says eventually.
He exhales softly. "Everyone keeps saying that."
"Because it is true."
He smiles faintly. "I am okay."
She stops walking.
He stops too, turning toward her in confusion.
She looks at him closely now. Not accusing. Not impatient. Just deeply attentive.
"You say that like it is a habit," she says. "Not like it is the truth."
Something flickers in his eyes. A flash of vulnerability. It disappears quickly, replaced by the familiar calm expression.
"I do not want you to worry," he says.
Ji Hye steps closer.
"I am already worried," she answers quietly. "Not because you are broken. But because you are tired and still pretending you are not."
He swallows.
For a moment, the mask slips.
Just a crack.
His shoulders sag slightly. His eyes lose focus. His breath stutters almost imperceptibly.
"I am trying," he whispers.
"I know," she says gently. "But trying does not mean doing it alone."
He looks at her then. Really looks. There is no judgment in her eyes. No fear. Only care. Steady and unwavering.
The mask wobbles.
He steadies it again, instinctively.
"I just need time," he says.
She nods, though worry still shadows her gaze. "Then I will give you time. But I am watching, Ha Jun. I will notice if you start disappearing."
Her words settle heavily in his chest.
They resume walking.
Around them, the world continues. Cars pass. People laugh. Life moves forward with careless momentum.
Ha Jun walks beside her, smiling softly when she speaks, responding when she asks questions. From the outside, he still looks like himself.
But inside, something is changing.
The mask he built over years of silence is starting to feel too heavy to wear all the time.
And cracks, once they begin, rarely stay small.