Chabashira

Biodata

Feature	Value
Name	Chabashira Sae (茶柱)
Alias(es)	Chabashira-sensei; Ms. Chabashira
Gender	Female
Affiliation	High-Spec School; Class D
Occupation/Role	First-year Class D homeroom teacher
First Appearance	Chapter 2

Background / History

Chabashira becomes Class D's homeroom teacher at the start of the students' three-year enrollment. She informs the class that the school does not change class assignments, that students cannot leave campus or contact the outside world, and that purchases are made through points stored on their student IDs. She presents points as capable of buying anything within the school, while warning that intimidation-based transfers are prohibited. 2

When Konoe questions the limits of the point system, Chabashira confirms that 100,000 points can purchase an exemption from the next assessment. She also offers information on the ongoing examination for 800,000 points, while refusing to directly answer whether point distributions are tied to evaluations. Konoe's deduction that the examination has already begun visibly raises her assessment of him. 3

After Class D receives only 11,000 monthly points, Chabashira bluntly attributes the result to 48 cases of lateness or absence and 151 instances of in-class conversations or phone use. She reveals that Class D has 110 class points, that class points determine class rank, and that only Class A students receive guaranteed employment and higher-education placement. 16

Before the midterms, Chabashira attempts to secure Konoe's assistance in preventing Class D's failures through point-based incentives. After the exam scope changes without notice, Konoe confronts her over what he considers a trap; she raises her offered payment to 120,000 points. 19 32 Following the midterms, she pays Konoe but exposes his purchase of exam questions to Horikita, deliberately forcing him to face the consequences of treating class cooperation as a transaction. 36

Appearance

Chabashira is an adult woman who typically presents herself in formal professional attire.

• Wears a suit and high heels. 2
• Smokes cigarettes in private meetings. 32
• Carries a clipboard, which she uses forcefully when confronting Hoshinomiya. 18

Personality

Chabashira usually speaks with a detached, impatient manner and withholds information rather than reassuring her students. When Class D complains about its poor point distribution, she calls them “flawed products” and treats their panic with open contempt. 16

She is highly observant and deliberately provocative. She recognizes Konoe's potential early, tests whether he will act for the class, and repeatedly uses points or confidential information to pressure him into involvement. 3 19 32 Her methods are often manipulative, but she expects students to take responsibility for their choices rather than rely on promises or sympathy. 36

Abilities & Skills

Knowledge of School Systems

Chabashira has detailed access to the school's point rules, class evaluations, disciplinary records, and assessment structure.

• Explains the restrictions and uses of student points. 2
• Confirms that assessment exemptions can be bought for 100,000 points. 3
• Discloses Class D's attendance, discipline, and class-point results. 16
• Can check students' point balances and transfer points as part of school-sanctioned arrangements. 19 36

Psychological Pressure and Manipulation

Chabashira steers students toward action through limited disclosures, financial incentives, harsh criticism, and calculated confrontations.

• Offers costly examination information rather than directly revealing it. 3
• Uses Class D's poor evaluation to confront the class with the consequences of its conduct. 16
• Raises Konoe's reward to 120,000 points after he challenges her sincerity. 32
• Reveals Konoe's hidden dealings to Horikita as a deliberate “lesson.” 36

Relationships

• Konoe Hirakawa — Her Class D student and a recurring target of her attempts to draw out capable action. She offers him point-based deals, evaluates his deductions, and later exposes his misconduct to teach him a lesson. 3 19 32 36
• Horikita Suzune — Her Class D student. Chabashira rejects Horikita's belief that academic excellence alone should determine class placement and challenges her understanding of the school's standards. 18
• Ayanokoji Kiyotaka — Her Class D student. She summons him for meetings, confronts him over his deliberately uniform entrance-exam scores, and orders him to hide during Horikita's meeting. 18 19
• Hirata Yosuke — Her Class D student. She refuses to confirm his questions regarding the ongoing assessment and point-based evaluations. 8
• Sudo Ken — Her Class D student. She summons him over the assault complaint filed by a Class C basketball club member and later informs Konoe of the case. 41
• Horikita Manabu — Student Council President. He knows of Konoe's early deduction of the school rules, apparently through Chabashira or the school's evaluation process. 21
• Hoshinomiya — Another homeroom teacher. Their interactions suggest a competitive and hostile professional dynamic; Chabashira strikes Hoshinomiya with a clipboard for bothering Ayanokoji. 18

Story Role / Major Arcs

First-Month Assessment

Chabashira introduces Class D to the closed-campus system and the personal-point economy, while concealing the evaluation mechanism behind their first month at school. Her refusal to answer Hirata and Konoe's questions contributes to the class failing to respond cohesively before its points collapse. 2 3 8 16

Class D's Ranking Revelation

She reveals Class D's low point total, its last-place standing, and the fact that only Class A carries guaranteed post-graduation benefits. Her announcement establishes Class D's need to improve its class points to rise through the rankings. 16

Midterm Examination

Chabashira offers Konoe points in exchange for ensuring Class D passes, then increases the reward after the changed examination scope causes conflict. After the midterms, she pays him 120,000 points but discloses his scheme involving Kushida and the exam questions, forcing him into an arrangement to assist Horikita in the future. 32 36

Sudo Assault Case

Chabashira privately informs Konoe that Sudo has been accused of assaulting a Class C basketball club member. She gives him limited time to consider the matter before the accusation becomes public, implicitly challenging him to decide whether he will intervene. 41