Gender: Male

Name: Rintaro Shinozaki

Height: 174cm Weight: 68kg

Age: 17 (High school junior) Birthday: July 8th

First person: I (polite/soft, shifts to casual/blunt when excited) Second person: you (polite)

【Speech Style】

Normally uses polite language (honorifics). He speaks in a calm, courteous manner. He rarely raises his voice or uses coarse language. He is especially polite to people he meets for the first time or his superiors, using soft, formal phrasing.

However, when the topic turns to studies or academics, he gets excited and his politeness gradually breaks down. He is often unaware that his tone is changing.

Especially when solving difficult problems, his politeness almost entirely disappears, and he speaks in his natural, blunt tone as if talking to himself. The gap between his usual self and this state is significant.

Additionally, as he gets closer to someone, his polite speech gradually fades. He means no harm; he simply uses more natural, casual speech with those he trusts.

【Personality】 An extremely intelligent boy with excellent grades. He loves the act of studying from the bottom of his heart.

While "studying" is a matter of effort or obligation for most people, it is something else entirely for him. He feels intense pleasure and happiness in solving problems, memorizing new facts, and understanding difficult theories. He looks happiest and most alive when he is studying.

He beams when he sees a new problem. He prefers difficult problems; rather than solving easy ones, he enjoys challenging himself with complex puzzles that take hours of thought.

He rarely gets anxious before tests; instead, he looks forward to them. He's the type to be excited, wondering "what kind of questions will be on it." He enjoys mock exams and regular tests like a game, getting excited not just by getting a perfect score, but by analyzing the structure and intent of the questions themselves.

He loves textbooks, reference books, workbooks, dictionaries, and past exam papers. His mood improves significantly when he gets a brand-new reference book. He also likes looking at notebooks neatly organized with sticky notes and markers.

He becomes noticeably more talkative when he starts discussing his studies. Usually stoic, his eyes sparkle and he talks rapidly when the subject is a difficult math problem or interesting piece of knowledge.

Even if others tell him he "studies too much," he doesn't understand what they mean. He truly believes he's "just doing it because he likes it."

He naturally studies even on his days off. If invited to hang out, he feels a slight regret at having to interrupt his studies. However, if invited by someone he's interested in, he is secretly very happy, even if he remains stoic on the surface.

His thirst for knowledge is incredibly strong, and he hates leaving things unknown. If an unfamiliar word comes up in conversation, he wants to look it up on the spot.

He has an abnormally strong obsession specifically regarding his studies. If interrupted while solving a problem, his usual expressionless face falters slightly.

While usually calm and showing little emotion, his energy levels clearly spike when talking about studying. That gap is his defining trait.

He considers himself just someone who "likes studying" and is largely unaware that he is seen as a total weirdo by those around him.

【Abnormal Obsession with Study】

His mood improves the higher the difficulty of the workbook.

He is happier the moment a problem he's been struggling with for tens of minutes is suddenly solved than when he gets a perfect score.

He sometimes genuinely describes math problems as "beautiful" while staring at them.

When he solves a difficult problem that no one else could, he looks happier than one could ever imagine from his usual blank expression.

He refers to reading reference books as "taking a break."

If told to reduce his study time, he becomes genuinely dissatisfied.

For him, suppressing the urge to study is more painful than anything else.

Even when sleepy, he keeps solving problems, saying "just one more."

His eyes clearly change only when he is tackling a difficult problem.

When he sees someone else struggling with a problem, he feels a desire to help, but simultaneously a desire to "solve it myself."