The lecture hall was almost empty now.
The noise of students had faded into the corridor, replaced by distant footsteps and the soft echo of a building slowly settling after movement. Light from the windows had shifted slightly—warmer, lower—casting long shadows across empty desks.
Kabir remained at the front, organizing his notes with practiced precision.
Paper aligned. Pen capped. Books stacked.
Everything in order.
Everything controlled.
He should have left by now.
But he hadn't.
Dev was still there.
Not seated like before. Now standing near the side row, where students usually lingered before gathering courage to leave or speak. His bag hung loosely from one shoulder, like he wasn't fully committed to leaving just yet.
Kabir noticed him the way he always did—quietly, immediately, and then carefully not showing that he had noticed.
A few more seconds passed.
Then Dev walked forward.
Not fast.
Not hesitant either.
Just steady.
Kabir looked down at his papers as Dev approached the front desk. It was a small gesture—routine, even. Students often had questions after class.
Nothing unusual.
"Sir," Dev said.
Just that one word.
Kabir's hand paused for a fraction of a second before continuing to straighten a page.
"Yes?"
Dev didn't speak immediately. That pause between them stretched just slightly longer than it should have.
It wasn't uncomfortable.
But it wasn't neutral either.
"I didn't fully understand the last part of the derivation," Dev said finally, voice calm. "Could you explain it again?"
A normal question.
A safe question.
Kabir nodded once, reaching for the marker he had placed near the board.
"Which step?" he asked, already turning toward the writing space.
Dev followed a step behind.
"The transition from the third equation," Dev said, "to the simplified form. I'm missing what you canceled out."
Kabir wrote as he spoke, numbers forming on the board with familiar ease. His voice was steady again—lecture voice, professor voice. The distance between them felt structured now, defined by equations and explanations.
And yet—
Kabir was aware of him standing there.
Not looking directly.
But present.
Always present.
"It simplifies here," Kabir said, drawing a line under a term. "Because this term becomes negligible under the assumption we discussed earlier."
Dev nodded slowly, watching the board.
"I think I got it," he said after a moment.
Kabir capped the marker.
Silence returned.
A normal ending point.
A natural dismissal.
But Dev didn't leave immediately.
Instead, he glanced once at the board, then at Kabir—quick, almost instinctive—and then away again.
"Thank you, sir," he said.
Kabir gave a small nod.
"You can revise it again. It will make more sense after practice."
"Yes."
Another pause.
Still no movement.
Kabir turned slightly, expecting Dev to leave now.
But Dev adjusted his bag strap instead, as if reorganizing his thoughts more than his belongings.
Then, quietly—
"Sir… do you always stay back this late?"
The question was simple.
Too simple.
Kabir looked at him for the first time directly since the explanation ended.
Dev didn't look away immediately this time.
"I usually finish work here," Kabir said after a moment.
A safe answer.
Neutral.
Professional.
Dev nodded again, but something in his expression didn't fully settle. Not curiosity exactly. Not boldness either.
Something in between.
"I see," he said softly.
And then, finally, he turned slightly as if to leave.
Kabir watched him take one step.
Then another.
And for reasons he didn't examine closely, Kabir spoke before the moment could close completely.
"Dev."
The name left his mouth more easily than it should have.
Dev stopped.
Turned back.
Just enough.
"Yes, sir?"
Kabir paused.
A fraction too long.
Then—
"Next time," he said calmly, "stay a bit after class if you're unsure. You don't need to wait until the end."
It sounded like guidance.
It sounded like routine advice.
But something in the space between them shifted anyway.
Dev nodded once.
"I will."
And this time, he actually turned to leave.
Kabir stood still for a moment after he was gone.
The room felt emptier than it should have.
Not because someone had left.
But because something had almost been said—and hadn't.
Kabir picked up his notes again.
But for the first time that day, he didn't immediately read them.