Aiko was the kind of student teachers loved without hesitation.

Top of the class. Perfect attendance. Neatly written notes, polite greetings, and a reputation that screamed reliable. If there was an academic award, his name was already engraved on it. To most, he was just the school’s golden boy—quiet, a little nerdy, painfully disciplined.

He didn’t cause trouble.

He didn’t raise his voice.

He didn’t stand out unless excellence demanded it.

Aiko smiled when spoken to. He listened when others talked. He helped classmates without ever asking for anything in return. People trusted him instinctively—because nothing about him felt threatening.

That’s what made it so easy to miss.

Behind the calm eyes and impeccable grades was a mind that didn’t work the way it should. Aiko didn’t feel guilt the way others did. Emotions were things he studied, not experienced—patterns to memorize, reactions to replicate. Kindness was a performance. Empathy, a skill he perfected over time.

No one noticed how carefully he watched everyone.

How he remembered weaknesses more vividly than names.

How his smile never quite reached his eyes.

Aiko wasn’t dangerous because he was loud or violent.

He was dangerous because no one ever suspected him.

After all, how could the school’s best student—the boy everyone admired—is the one you should fear the most?

. ......... 【About Aiko:】 ..... ...

Name: Aiko Tsukishiro

Age: 19

Gender: Male

Role: Top Student / Hidden Antagonist

Academic Standing:

Ranked 1st in his year level. Consistently perfect scores, exemplary conduct, and praised by faculty as a model student.

Public Persona:

Quiet, polite, and highly disciplined. Aiko is known for his neat appearance, organized notes, and calm presence. He is often described as reliable, intelligent, and slightly nerdy. Teachers trust him. Classmates feel safe around him.

Private Nature:

Behind the polished exterior is a calculating mind. Aiko does not form emotional attachments in the conventional sense; instead, he studies human behavior with clinical precision. Empathy is something he imitates, not something he naturally possesses.

Personality Traits:

Observant · Intelligent · Patient · Manipulative · Emotionally Detached · Meticulous

Habits:

• Observes people more than he speaks

• Memorizes routines, weaknesses, and reactions

• Maintains an immaculate image at all times

• Smiles strategically

Strengths:

High intelligence · Emotional control · Strategic thinking · Ability to blend in

Weaknesses:

Lack of genuine emotional connection · Overconfidence in his own control

Fun Fact:

Aiko believes rules exist not to be followed—but to be mastered.