Class D

Biodata

Feature	Details
Name	Class D
Alias(es)	D班; First-year Class D
Affiliation	Advanced Nurturing High School
Occupation/Role	First-year class; initially the school's lowest-ranked class
Status	Active
First Appearance	Chapter 1 1

Personality

Class D begins as a fragmented, undisciplined group whose members prioritize personal comfort and spending over collective consequences. Lateness, sleeping in class, phone use, noise, and other violations reduce its monthly personal-point distribution to zero. 1 7 8

The zero-point penalty forces the class to confront shared responsibility. Its members remain prone to arguments, fear, selfishness, and provocation, but increasingly learn to report their limits, accept assigned roles, and account for how their actions affect everyone else. 8 29 41 42

By the Uninhabited Island Special Exam, Class D has become capable of functioning through distributed responsibility rather than relying solely on Gu Heng. Its cohesion remains imperfect, but its members can maintain discipline, coordinate logistics, and resist Class C's attempts to destabilize them. 38 41 80

Following the Identity Grouping Exam's unresolved -50 class-point settlement, Class D becomes particularly cautious about the distinction between official facts, private results, public annotations, and speculation. Rather than identify a culprit through incomplete evidence, it preserves individual privacy and limits its collective statements to verifiable records. 104 105 106 115

During Sports Festival preparations, the class increasingly treats willingness, personal confirmation, handovers, and responsibility boundaries as necessary conditions for participation. It resists pressure to fill blank positions, expose internal records, or allow other classes to define its preparations through public speculation. 117 119 120 132 135

Organization and Leadership

Position	Holder(s)	Responsibilities
Visible leader / class representative	Suzune Horikita	Represents Class D publicly, enforces discipline, issues visible decisions, and confirms public exam actions. 21 72 74
Strategist / final-stage leader	Gu Heng	Develops rules, allocates resources, organizes assignments, manages cross-class information, and assumes the hidden final-stage leader role during the island exam. 21 71 72
Coordinator / mediator	Yosuke Hirata	Maintains communication, mediates disputes, tracks classmates' conditions, and coordinates assignments. 6 21 38
Discipline and records	Horikita and Yukimura Teruhiko	Horikita records violations and supervises movement; Yukimura maintains operational data, including supplies, timing, and performance records. 9 38 71
Front-line and perimeter support	Ken Sudo and other assigned students	Handles decoys, outer-perimeter tasks, transport, rescues, and physically demanding duties. 34 38 44
Sports Festival event confirmation	Horikita	Confirms Class D's external position and event-related responsibilities without treating incomplete preparation data as final participation. 115 120 133
Sports Festival training coordination	Sudo and Hirata	Sudo organizes confirmed physical-training arrangements and refuses to assign unconfirmed positions; Hirata collects voluntary events, training times, substitute willingness, and handovers. 119 120 121
Archive and information boundaries	Horikita, Gu Heng, and Yukimura	Separates official settlements, internal records, personal results, public statements, and school-page materials; preserves sources and permissions without converting hypotheses into facts. 104 105 109 115 137

Strategies and Capabilities

Collective Discipline System

Following the zero-point penalty, Class D establishes classroom discipline as its first formal rule. Horikita records violations, Hirata coordinates implementation, and Gu Heng keeps track of students most likely to create future problems. 8 9

• Uses consequences and records rather than vague appeals to goodwill.
• Treats individual misconduct as a class-wide liability.
• Relies on Hirata and Kushida's social influence to make rules more acceptable to the wider class. 8

Academic Recovery

Gu Heng divides the class into academic tracks based on ability before a school-wide assessment. The system focuses on reducing preventable losses rather than promising an immediate rise in rank. 17 19

• Basic-question completion rate improves.
• Blank-answer rate decreases.
• The gap between Class D and higher-ranked classes narrows, though Class D remains last in the public academic ranking. 19
• The class adopts Horikita's principle that students should rely on the method rather than Gu Heng's authority. 19

Information Control and Misdirection

Class D selectively shares public information while using coordinated half-truths to shape other classes' assumptions about its leadership and preparation. 26 27

• Gives Class C consistent descriptions of Horikita as the visible leader, Hirata as coordinator, Sudo as front-line strength, and Gu Heng as an internal planner. 26 27
• Distinguishes between hostile reconnaissance and potentially useful exchanges with Class B. 26
• Alters patrol orders, route sheets, substitute chains, and public-facing arrangements in response to Class C interference. 52 59 60 70
• Limits the scope of deception: false information is intended to reveal an opponent's observation priorities, not guarantee that they will be fooled. 26
• Separates its public representative from its final-stage leader during the island finale, preventing a correct guess about Gu Heng from automatically invalidating Horikita's public role or the class's operational records. 71 72 80

Distributed Island Operations

During the Uninhabited Island Special Exam, Class D divides tasks among multiple members instead of placing every decision on one person. 34 38 41

• Uses Sudo and Ike as a decoy team while the main force reaches a designated zone by a shaded route, securing the first round against Class C. 34
• Sends rescue teams for missing classmates rather than abandoning them before the confirmation window closes. 43 44
• Conducts staggered transfers to a new base and withdraws groups to protect its location when Class C approaches the old camp. 46 47
• Splits water-gathering teams between a dangerous nearby source and a safer distant source. 48
• Delegates field decisions to Hirata, Horikita, Sudo, Yukimura, and others, making the class harder to disrupt by isolating Gu Heng. 38
• Uses separate records for public representation, supplies, withdrawals, and final-stage leadership so that the loss of one field does not erase the class's other confirmed actions. 71 72 80

Record Boundaries and Evidence Control

After the Identity Grouping Exam, Class D formalizes a distinction between official settlement data, voluntarily disclosed personal information, public annotations, and unverified interpretations. 104 105 106

• Records the -50 class-point deduction as an official fact while refusing to treat private result pages or differing notification times as proof of an individual submitter. 105
• Preserves page versions, timestamps, access permissions, and failed annotation requests in restricted records. 104 106
• Does not use Kushida's screenshot or other incomplete materials as testimony when they cannot establish responsibility. 105
• Separates Class D's response channel from official school settlement fields and records its authorized account, representative, and archiving operator. 109
• Keeps withdrawn permissions and personal choices on record without continuing to use them for public verification. 109

Sports Festival Preparation Framework

For the Sports Festival, Class D builds a consent-based preparation system before the school releases complete event, scoring, and grouping rules. 115 117 120

• Uses separate registration fields for voluntary events, available training times, and willingness to act as a substitute. 117 120
• Requires personal confirmation before assigning responsibility changes or treating a student as a replacement. 120
• Records repeatability, personal confirmation, and handover impact rather than reducing preparation to the best individual result. 124
• Limits public information to Class D's confirmed position and preparation scope while retaining detailed training and personal records internally. 121 133 135
• Refuses to let Class C's whiteboards, option boards, or spectators' judgments become part of its own records. 128 132
• Preserves pre-notice preparation records after the formal project module appears, but does not automatically apply them to the school's newly released project. 136 137

Story Role and Major Arcs

Point Collapse and Reform

Class D receives 100,000 personal points per student upon entering the school and initially treats the allowance as unrestricted wealth. Gu Heng recognizes the distribution as a test, while most classmates spend recklessly and ignore school discipline. 1 2

At the start of the following month, the class receives zero additional points. Chabashira explains that personal-point distribution reflects overall class evaluation, forcing Class D to recognize that it has been placed in Class D because of its own behavior rather than bad luck. 7 8

The class responds by accepting its first survival framework: discipline tracking, mediation, internal records, and clearer responsibility for recurring problems. 8 9

Academic Assessment

Facing an academic assessment, Class D organizes students by ability and creates targeted study tracks. The resulting scores do not remove the class from last place, but demonstrate measurable improvement and establish that coordinated methods can reduce losses. 17 19

Uninhabited Island Special Exam

Class D chooses a three-part leadership structure before the island exam: Horikita as its public face, Gu Heng as planner and resource manager, and Hirata as the bridge to classmates who might resist direct control. 20 21

The class survives the first phase without falling to last place, then adapts to dynamic zone evaluation, supply pressure, missing personnel, altered route sheets, hostile rumors, and Class C's repeated provocations. 40 43 52 56 59 60

For the final phase, Horikita is publicly registered as Class D's representative while Gu Heng is secretly submitted as its final-stage leader. Class C correctly identifies Gu Heng, but cannot invalidate Class D's separate public representation, supply records, or withdrawal records. 72 74 80

Class D finishes the Uninhabited Island Special Exam in second place. 80

Cruise Ship: Identity Grouping Exam

After the island exam, Class D enters the cruise ship's “Identity Grouping” Special Exam, in which mixed-class Zodiac Groups must identify a hidden VIP while balancing personal rewards against class-point penalties. 81

Gu Heng, Sakura Airi, and Yukimura are assigned to Rabbit Group alongside members of Classes A, B, and C. Class D's approach is to report facts without speculative conclusions and avoid being manipulated into costly guesses. 81 82 83

The exam ultimately ends with a -50 class-point settlement for Class D due to at least one incorrect submission. The available settlement information does not identify the submitter, the submitted answer, or the reasons behind the attempt. 105

Rather than compel members to reveal their private result pages, Class D confirms only the class-wide deduction and establishes a record boundary between official settlement, individual choices, and public annotations. 104 105 109 115

Sports Festival Preparation

After the Identity Grouping Exam is archived, Class D begins preparing for the Sports Festival before the full event list and scoring system are released. Horikita, Sudo, and Hirata divide event confirmation, training coordination, and external communication, while Gu Heng focuses on making the preparation forms and records functional rather than taking direct control of every event. 115 120

Class D registers five total participants or preparation positions, retains unnamed substitute slots, and declines to restore a withdrawn position merely to improve its public total. 119

Class C repeatedly attempts to pressure the class through public whiteboards, copied terminology, and spectator-facing option boards. Class D responds by maintaining clear boundaries between public status, internal preparation records, personal confirmations, and official school results. 121 126 128 132 135

When the school releases the formal project module, Class D preserves its prior preparation records but opens and evaluates the official source separately, refusing to let old observations or external speculation substitute for formal rules. 136 137

Documented Results

Assessment	Result	Notes
Monthly personal-point evaluation	0 additional points	Class-wide misconduct and poor discipline reduce the class's points to zero. 7 8
Academic assessment	Remains last	Basic-question completion improves, blank answers decrease, and the score gap to higher classes narrows. 19
Uninhabited Island Special Exam, first phase	Avoids last place	Class D maintains a viable ranking through assigned roles and coordinated field operations. 40
Uninhabited Island Special Exam, final phase	Second place	Class C correctly guesses Gu Heng as final-stage leader, but Class D's valid public and operational records preserve its final result. 80
Identity Grouping Special Exam	-50 class-point deduction	An incorrect submission causes a class-level deduction, but the settlement does not establish the submitter, answer, or individual responsibility. 105
Sports Festival preliminary registration	Total registration of 5	Class D confirms voluntary participation and retains anonymous substitute positions rather than filling every opening. 119

Relationships

• Gu Heng — Class D's principal problem identifier and strategist; develops rules, risk assessments, resource plans, cross-class responses, and later record-management boundaries without treating his judgments as collective facts. 8 21 42 104 137
• Suzune Horikita — Public representative and visible leader; works with Gu Heng while retaining independent authority over public decisions, discipline, settlement responses, and Sports Festival event confirmation. 21 72 74 105 120
• Yosuke Hirata — Mediator and coordinator; helps keep the class stable, but gradually learns to delegate rather than personally carry every burden. He also manages voluntary participation, training availability, and handovers during Sports Festival preparations. 6 38 50 117 120
• Kiyotaka Ayanokoji — Observant Class D member and temporary ally; provides reminders and field support without seeking the visible center of the class. He also helps identify procedural weaknesses in Class D's new responsibility forms. 42 44 72 105 120
• Ken Sudo — Front-line asset whose growing self-control becomes a visible sign of the class's reform. During Sports Festival preparations, he serves as a temporary coordinator for confirmed training tasks while insisting that unconfirmed blanks not be assigned to him or others by default. 34 38 49 117 120
• Yukimura Teruhiko — Class D's principal data and archive keeper; maintains supplies, timings, operational records, restricted backups, and separate documentation for school settlements, personal disclosures, and public statements. 29 71 104 106 115
• Kikyo Kushida — Socially influential collector of class concerns and information. Class D uses her ability to collect voluntary public-cooperation and preparation information, but increasingly restricts her access to sensitive channels and requires her to respect defined boundaries. 8 30 72 115 128
• Sae Chabashira — Homeroom teacher whose explanation of the point system forces Class D to begin acting as a class. She later provides school notices that require the class to prepare while formal Sports Festival rules remain incomplete. 7 8 120
• Class C — Primary rival during the island exam; uses reconnaissance, false rumors, route interference, and leader guesses to expose Class D's internal structure. During Sports Festival preparations, it continues applying pressure through public whiteboards, copied phrases, and spectator speculation. 26 56 60 80 126 132
• Class B — Situational trading partner; Class D attempts to preserve a workable relationship by offering verifiable exchanges rather than treating every class as an enemy. After the Identity Grouping Exam, Class B conditions renewed exchanges on Class D clearly separating class facts, personal choices, and public entries. 26 56 57 109 137
• Class A — External observer and negotiator; Sakayanagi and Hashimoto assess Class D's value through its handling of information and public representation. Class A remains a source of potentially useful but priced intelligence. 70 74 77