Class D

Biodata

Background / History

Class D begins the school year as a 40-student class regarded by the school as consisting of “flaws” or defective students. Chihaya Rei deliberately manipulates his admission scores to be placed there, viewing its many notable students as ideal targets for his Torture God-Person System. The classroom has five columns and eight rows; Rei sits in the middle of the last row, near Ayanokoji Kiyotaka and Horikita Suzune. 1

During the first-day introductions, existing tensions become visible. Yamauchi Haruki is exposed for exaggerating his baseball accomplishments, while Ken Sudo disrupts the class by kicking his desk and insulting Hirata Yousuke. Rei publicly rebukes both students, prompting other classmates to criticize Sudo as well. 2

The class is initially given 100,000 personal points per student and assumes the allowance is unconditional. Many students spend heavily on entertainment and luxury goods, while Rei cautions Sakura Airi against careless spending. 3 8

Rei learns the school’s hidden behavioral assessment and the relationship between conduct and class points, but deliberately sells this information to Classes A, B, and C rather than informing his own class. As Class D discovers that discipline is leniently enforced, many students become habitually late, use phones during lessons, sleep, play games, eat, and otherwise ignore class rules. 9 11 17

On May 1, Class D receives 0 class points and no personal-point distribution. The school cites 98 instances of tardiness, early departures, or absences and 407 instances of mobile-phone use in class, among other violations. The other first-year classes stand at 980, 880, and 770 class points respectively. 18

The revelation throws the class into disorder, particularly after Chabashira Sae announces that students who fail even one midterm subject will be expelled. Arguments erupt over responsibility for the point loss, but Rei forces the groups to confront their shared responsibility; the students ultimately apologize and Hirata and Kushida begin organizing study sessions. 19 20

Sakayanagi Arisu later provides midterm answers to Kushida Kikyo, ensuring that Class D avoids expulsion. The class interprets this assistance as being connected to Rei, and the study sessions are cancelled. 37 40

Despite avoiding expulsions, Class D earns only 100 class points after the midterms and remains far behind the other classes. 45

Class Points

Membership and Internal Dynamics

Prominent Students

• Chihaya Rei — A Class D student who becomes highly influential despite withholding crucial school information from the class; classmates later remain loyal when Ryuen attempts to turn them against him. 17 21 54
• Horikita Suzune — A diligent student angered by Class D’s collapse to zero points; she wishes to lead the class toward Class A. 18 21
• Ayanokoji Kiyotaka — A quiet student identified by Rei as one of the few classmates not responsible for the first-month behavioral deductions. 20
• Hirata Yousuke — A conciliatory mediator who attempts to maintain peace and organizes study sessions for struggling students. 19 20
• Kushida Kikyo — A popular mediator who helps reconcile the class and participates in organizing study sessions; she receives Sakayanagi’s exam answers. 20 37
• Sakura Airi — A timid student who follows Rei’s advice to conserve points and later supplies photographic evidence concerning the Class B–Class C conflict. 8 18 61
• Ken Sudo — An aggressive student whose early conduct contributes to the class’s poor atmosphere; he later separates from Yamauchi and joins study sessions. 2 60
• Ike Koji and Yamauchi Haruki — Heavy spenders and frequent classroom-rule violators whose behavior becomes a focal point of the blame following the point collapse. 8 18 19
• Yukimura Teruhiko — A rule-abiding student who resents being collectively punished for the misconduct of others. 19
• Koenji Rokusuke — An eccentric and self-assured student who refuses to be intimidated when Ryuen confronts Class D. 1 52

Factions and Conflicts

• Ike–Yamauchi–Sudo clique — Ike, Yamauchi, and Sudo initially form a close group and live in adjacent dorm rooms. Their relationship later fractures after Sudo recognizes Yamauchi’s true nature. 8 60
• Girls versus Ike and Yamauchi — The class-point crisis exposes resentment over the boys’ conduct, including comments about female classmates’ appearances and figures. 19
• Rei’s influence — Although he does not act for Class D’s advancement, Rei can impose order during disputes and is considered popular enough that he expects accusations against him to fail. 20 21

Story Role / Major Arcs

First-Month Behavioral Assessment

Class D’s students mistake the school’s initial point distribution for a guaranteed allowance. Rei knowingly allows the class’s misconduct to continue while selling the relevant rules to rival classes. The result is an unprecedented collapse to zero class points. 11 17 18

Midterm Expulsion Crisis

After learning that seven students risk expulsion for failing the midterms, Class D descends into blame and panic. Rei’s intervention ends a near-physical confrontation, while Hirata and Kushida establish study sessions. Sakayanagi’s later delivery of exam answers prevents any Class D expulsions. 19 20 37

Ryuen’s Investigation

Ryuen Kakeru suspects that Class D may be connected to the anonymous information seller and visits the classroom while searching for the culprit. Class D collectively rebukes him, and Ryuen notes Rei as a continuing suspect. 52

Class B–Class C Incident

When Class C frames Class B student Shibata So for assault, Rei uses Sakura Airi’s eyewitness testimony and photographs to investigate. This places Class D indirectly in the conflict between Ryuen and Class B. 60 61 62

Trivia

• Class D’s zero-point result is described as the lowest class-point record in the school’s history. 18
• The other three first-year classes receive unusually high first-month totals because Rei sold them information about the school’s rules. 18
• Rei describes zero as the limit of class points, “not the limit for Class D.” 18