Aum noticed the change the next morning.
Not in the city.
Not in the bookstore.
In himself.
The realization arrived while he was arranging a newly delivered stack of travel literature near the front display window. One of the books slipped slightly out of alignment after a tourist picked it up and returned it carelessly. Aum adjusted it immediately, restoring the edge to its proper position against the others.
Then stopped.
Because Xu Chen would have fixed it differently.
The thought appeared with immediate, irritating clarity.
Xu Chen preferred symmetry by visual balance, not measurement. When arranging objects, he adjusted based on instinctive proportion rather than exact spacing. The left side of a display would always sit marginally lower than the right because his visual center compensated for human eye movement unconsciously.
Aum stared at the books for a second longer.
Then realigned them according to Xu Chen's preference instead.
His hand froze halfway through the motion.
The recognition followed instantly.
Adaptation-through-retention.
Again.
Aum stepped back from the shelf slowly.
The bookstore remained quiet around him. A pair of tourists near the history section whispered over postcards. Someone outside laughed loudly before the sound dissolved back into Renmin Road's steady morning rhythm.
None of it interrupted the thought.
His behavior was continuing to reorganize itself around a person no longer physically present.
That was not efficient.
On Brihyansh, prolonged attachment after separation usually weakened operational clarity. Emotional dependence was treated as a structural flaw if it began interfering with autonomous baseline function.
Yet over the past seven days, Xu Chen's absence had not reduced the behavioral imprint.
It had intensified it.
Aum looked down at his own hand still resting against the edge of the shelf.
Then quietly moved the books back to the exact alignment he personally preferred.
Three seconds later, he changed them again.
"Okay," Meera said slowly, setting her coffee down on the counter near the register. "Now you're scaring me a little."
Aum looked at her.
"You rearranged that display four times in under a minute."
"I rearranged it twice."
"That is not the important part of the sentence."
Meera studied him carefully over the rim of her sunglasses. She had arrived fifteen minutes earlier carrying iced coffee and unnecessary commentary, both of which she considered contributions to society.
Aum waited.
Meera narrowed her eyes slightly.
"You spoke to Xu Chen?"
"No."
"Did he speak to you?"
"No."
"Then why do you look like someone running advanced emotional diagnostics against his own will?"
Aum considered the phrasing.
"It is possible," he said finally, "that prolonged proximity to Xu Chen altered certain baseline behavioral structures more extensively than I calculated."
Meera stared at him.
Then pointed at him dramatically with the straw of her coffee.
"There. That. That is exactly what I mean." She leaned against the counter. "No normal person says things like that after missing someone."
Aum blinked once.
"I did not say I missed him."
Meera's expression became deeply unimpressed.
"Aum," she said patiently, "you reorganized books because they reminded you of him."
"That is observational carryover."
"That is yearning with extra syllables."
Aum went silent.
Meera watched him for another second before her expression softened slightly.
Not pity.
Something closer to fond exasperation.
"You know," she said, stirring her drink absentmindedly, "for someone from this world, your emotional processing is honestly very inefficient."
Aum tilted his head slightly.
"Clarify."
"You experience feelings first and identify them six business days later."
"That timeline is exaggerated."
"Not by much."
A tourist approached the counter before Aum could answer. Meera stepped aside while he handled the purchase with his usual smooth precision. The interaction lasted less than a minute.
The moment the customer left, Aum looked back at her.
"You are avoiding your actual reason for visiting."
Meera sighed dramatically.
"See? Terrifyingly observant."
"You arrived without books. Therefore your purpose was social."
"Xu Chen has ruined you," she muttered.
Aum did not respond to that.
Meera took another sip of coffee before speaking again.
"There's a festival starting soon. Sanyuejie."
Aum recognized the term immediately. "Third Month Fair."
"Good. At least one of us studies local culture voluntarily."
"You sent me six articles about it at two in the morning."
"That was research enthusiasm."
"That was digital harassment."
Meera laughed unexpectedly loudly at that.
Several people in the bookstore glanced over.
Aum waited for her to recover.
When she finally did, she shook her head. "You know what? Xu Chen was right."
Aum's attention sharpened instantly.
Meera noticed.
Of course she noticed.
"Oh, that's interesting," she said lightly.
"What did Xu Chen say?"
"Nothing important."
A Pause
"You are spending too much time around emotionally unavailable people."
Aum looked at her steadily.
Meera exhaled through her nose.
"He said you should experience it at least once before tourist season gets worse." She paused. "And before you disappear entirely into work and existential confusion."
Aum processed the sentence carefully.
"Xu Chen suggested this?"
"Yes."
The bookstore suddenly felt quieter than before.
Not externally.
Internally.
Aum lowered his gaze briefly toward the counter.
The strange pressure behind his sternum returned again—that same dense, unfamiliar sensation that appeared whenever Xu Chen entered his thoughts unexpectedly.
On Brihyansh, emotional responses were usually categorized through biological compatibility metrics and long-term social stability projections. Feelings that disrupted concentration without clear functional value were chemically regulated during adolescence to prevent irrational pair-bond dependency.
Earth had no such systems.
Which meant Xu Chen continued existing inside Aum's mind without moderation.
Irritatingly often.
Meera watched his expression carefully now.
Noticing.
Connecting.
"Aum," she said more gently this time, "did leaving actually make anything easier for you?"
The question remained between them.
Aum did not answer immediately.
Because the truthful answer had become increasingly inconvenient.
The separation had solved practical concerns.
He now earned independently.
Managed social interactions alone.
Understood transportation systems more efficiently.
Required less direct support.
Operationally, the decision had succeeded.
Emotionally—
Aum looked toward the bookstore window.
Morning light spilled across Renmin Road in fractured gold through the trees outside. Somewhere beyond the crowded streets and old stone buildings was Xu Chen's villa, existing with its cold precision exactly as it had before Aum arrived.
Except it wasn't exactly the same.
Neither was Xu Chen.
Neither was Aum.
"No," he said quietly at last.
Meera did not smile.
She only nodded once like someone hearing confirmation of something she already knew.
"Good," she said softly. "That means you're finally being honest."
Aum frowned slightly.
"I fail to understand why honesty here, appears to produce increased discomfort instead of reducing it."
Meera picked up her coffee again.
"Oh, that part never improves," she said. "Welcome to being normal."