The rumor spread faster than Rei had predicted.
Not because it was shocking.
But because it was incomplete.
Incomplete information was the most fertile ground for speculation. Humans disliked uncertainty. When facts were missing, they filled the gaps with imagination, fear, or admiration.
By the time the afternoon classes ended the previous day, three different versions of the story were circulating through Class D.
In one version, Rei had scored near-perfect marks on every placement exam but had somehow been placed in Class D due to a disciplinary issue.
In another, she had intentionally sabotaged her own scores.
The third version—quietly whispered between students who enjoyed dramatic explanations—suggested that Rei was some kind of transfer student connected to the mysterious "White Room" rumors occasionally mentioned in online forums.
Rei had neither confirmed nor denied any of them.
Which meant the rumors continued growing.
Exactly as expected.
The next morning, the classroom atmosphere had changed.
Not dramatically.
But enough.
Students looked at Rei more often now. Conversations lowered slightly when she walked past. The uncertainty surrounding her had turned into something heavier.
Attention.
Attention was a currency.
Rei intended to spend it carefully.
She entered the classroom at the same precise time as always.
The moment she stepped inside, she felt the shift.
Three students near the back stopped talking.
Two others looked away quickly.
Horikita Suzune was already seated near the front, reading a book, but her eyes lifted briefly the moment Rei appeared.
Observation acknowledged observation.
Rei walked to her seat and placed her bag down.
Then she waited.
The pattern had already begun forming.
And it repeated exactly as predicted.
Thirty seconds later—
"Good morning."
Kei Karuizawa had arrived.
Her tone sounded casual.
But the way she stood beside Rei's desk made it clear that the greeting was not random.
Rei looked up.
"Good morning."
Kei leaned slightly against the desk beside her.
"You caused a lot of noise yesterday."
"I answered a question."
"That's not the same thing."
Kei crossed her arms.
"Everyone's talking about you now."
Rei closed her notebook slowly.
"That outcome was likely."
Kei blinked.
"You say things like you planned it."
Rei tilted her head.
"Would that bother you?"
Kei hesitated.
Then she smiled faintly.
"No."
That answer came too quickly.
Rei studied her expression.
Curiosity had grown stronger.
But something else had joined it now.
Excitement.
Kei enjoyed uncertainty.
That trait could be useful.
Or dangerous.
The first class began shortly afterward.
The teacher spoke about mathematics. Equations filled the board. Students copied formulas with varying degrees of enthusiasm.
Rei continued observing.
Class D's hierarchy had begun shifting slightly overnight.
The rumor had elevated her social presence without any direct action on her part.
That created an interesting phenomenon: students who had ignored her previously were now watching carefully, trying to determine how to behave around her.
When people did not understand someone's status, they instinctively searched for cues.
Confidence.
Competence.
Social reactions.
Rei offered none of them clearly.
Which meant the uncertainty continued growing.
Exactly as she wanted.
During the mid-morning break, the first new interaction occurred.
A tall boy from the back row approached her desk.
His name was Yamauchi.
Rei had already analyzed his behavior pattern.
Overconfident.
Attention-seeking.
Easily influenced by perceived status shifts.
He leaned against the desk with forced casualness.
"So," he said, "I heard you're some kind of genius."
Rei looked at him calmly.
"I doubt that description is accurate."
Yamauchi grinned.
"That sounds like something a genius would say."
Rei remained silent.
Silence had an interesting psychological effect during confrontations.
It forced the other person to continue speaking.
Yamauchi eventually did.
"So what were your test scores?"
Rei answered immediately.
"Private."
"Why?"
"Because I prefer it that way."
That response irritated him slightly.
Rei noticed the tension in his jaw.
"So you're hiding something."
"Everyone hides something," Rei replied.
Then she returned to her notebook.
Conversation finished.
Yamauchi remained standing there for several seconds before realizing the interaction had ended.
He left looking faintly annoyed.
Around the room, several students had been watching.
Another small ripple of curiosity moved through the class.
But the most important reaction came from Kei.
She walked over again once Yamauchi left.
"You do that on purpose."
Rei looked up.
"Do what?"
"You make people feel stupid without insulting them."
"That interpretation is subjective."
Kei laughed quietly.
"No, it's accurate."
She sat on the edge of the nearby desk.
"You're weird."
Rei considered that statement.
"Define weird."
"You don't care about what people think."
"That isn't entirely true."
Kei leaned forward slightly.
"Then what do you care about?"
Rei held her gaze for several seconds.
Then she answered honestly.
"Results."
Kei's expression changed.
That word had weight.
"Results from what?"
Rei paused.
Then she said something that made Kei's pulse quicken slightly.
"Experiments."
Across the classroom, Horikita had been listening.
Her book remained open.
But she had not turned a page for several minutes.
She was analyzing the situation carefully.
The problem with Rei was not intelligence.
Horikita had encountered intelligent students before.
The problem was intention.
Rei behaved like someone studying the class rather than participating in it.
Which meant she was either extremely arrogant—
Or extremely dangerous.
Horikita closed her book slowly.
For now, she decided to continue observing.
But eventually, she would need answers.
Lunch arrived.
The cafeteria buzzed with conversation and movement.
Students filled tables quickly.
Rei chose the same seat she had used the previous day.
Consistency created patterns.
Patterns created expectations.
And expectations were easy to manipulate.
Kei arrived soon afterward.
But this time she didn't come alone.
Two girls from her social group followed her.
They looked uncertain about approaching Rei, but Kei seemed unconcerned.
She sat down directly across from Rei again.
"You're becoming popular," Kei said.
Rei sipped her tea.
"Unlikely."
"You started a rumor war yesterday."
"That was not intentional."
Kei raised an eyebrow.
"I don't believe you."
Rei placed the cup down calmly.
"Belief is optional."
One of the girls beside Kei leaned forward cautiously.
"Can I ask something?"
"Yes."
"Are you really studying everyone here?"
The question carried genuine curiosity.
Rei answered without hesitation.
"Yes."
The table went silent.
Kei stared at her.
"You're serious."
"Yes."
"Why?"
Rei considered the best explanation.
Then she gave the simplest one.
"Because human behavior is predictable under pressure."
Kei felt a small shiver run down her spine.
"Pressure?"
Rei nodded slightly.
"Everyone reacts differently."
She looked directly at Kei.
"And those reactions reveal interesting things."
Kei held her gaze.
For a moment, neither spoke.
Then Kei smiled slowly.
"You know what?"
"What?"
"I think you're dangerous."
Rei tilted her head slightly.
"That possibility exists."
Instead of being disturbed by the answer—
Kei laughed.
And that reaction made Rei pause internally.
Because it was not the response she expected.
Most people distanced themselves when confronted with the idea of danger.
Kei moved closer.
Which meant Kei was not reacting like a normal subject.
That made the experiment more complicated.
But also more interesting.
Later that afternoon, as students packed their bags, Horikita finally approached Rei's desk.
The classroom quieted slightly.
Everyone noticed.
Horikita stood beside her with composed posture.
"We need to talk," Horikita said.
Rei looked up.
"About what?"
"You."
Rei closed her notebook.
"That is a broad topic."
Horikita's eyes sharpened slightly.
"You're influencing the class."
"That's a strong assumption."
"It's an observation."
The two girls held each other's gaze.
Neither moved.
Around them, students pretended not to listen.
But everyone was paying attention.
Finally, Horikita spoke again.
"You said yesterday that you control information."
"Yes."
"Why?"
Rei answered calmly.
"Because information controls people."
Horikita did not react immediately.
But internally, she reached a conclusion.
Rei was not simply another student.
She was someone who viewed the class as a system to manipulate.
Which meant one thing.
If left alone—
She would eventually control it.
Horikita turned away.
But as she walked back to her seat, she realized something unsettling.
For the first time since entering Advanced Nurturing High School—
She had met someone whose intentions she could not fully predict.
And that made the classroom far more dangerous than before.
Across the room, Kei watched Rei quietly.
Her expression was thoughtful.
Curious.
Excited.
And something else.
Something that had not existed before Rei arrived in Class D.
Interest that felt personal.
Rei noticed.
And for the first time since beginning the experiment—
She wondered what kind of reaction Kei would produce under real pressure.
The answer would come soon enough.
The experiment was only beginning.