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

After the formal Sports Festival modules are released, Class D further develops this caution into a procedural culture. It distinguishes school-recognized groupings from internal actions, personal applications, resource use, public status, and class preparations, even when preserving those distinctions delays its work. 139 144 153 156 163

The class increasingly accepts that a member's refusal, postponement, or incomplete action is not automatically disloyalty. It records individual limits and consequences without converting them into a collective guarantee, and will accept disadvantages in event allocation or exchange negotiations rather than expose a member's private information or force participation. 166 171 185

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
Formal-module confirmation	Horikita, Hirata, individual students, and the third-row registrant	Horikita confirms public status and scope, Hirata files scoring sources and individual confirmations, each student confirms their own field, and the third-row registrant verifies grouping sources. 139 140
Personal-resource and preparation sequencing	Gu Heng, Hirata, Horikita, and Sudo	Separates personal applications from locked Class Preparations, records consent and resource occupation, protects original preparation order, and keeps substitute coordination suspended unless new consent is obtained. 153 156 157 161
Event-exchange procedure	Horikita, Gu Heng, Hirata, Sudo, and the participating student	Defines the participant, event, terms, invalidation conditions, and responsible parties for exchanges while preventing personal names, training records, or weaknesses from becoming class-wide bargaining material. 170 171 185

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
• Uses public Sports Festival status sheets to disclose verifiable scope and progress without disclosing private identities, timings, personal results, or internal conditions. 156 161 163
• Treats other classes' interpretation of a public status as their own judgment rather than an obligation for Class D to explain or correct private details. 162 163

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
• Treats formal Sports Festival modules as authoritative sources while preserving earlier preparations as historical records rather than automatically converting them into official positions. 136 137 139
• Keeps school results, public class status, internal actions, personal applications, and resource records in separate fields with defined sources and scopes. 144 153 159

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
• Reads scoring and grouping modules by source before entering conclusions; the public sheet records status and scope rather than unconfirmed rankings, event results, or individual groupings. 138 139 140
• Defines internal actions within an individual's confirmed scope as distinct from official grouping, which remains subject to the school page. 144 150
• Allows personal application sections to reopen separately while keeping substitute coordination suspended and preventing one applicant's history, timing, or consent from being transferred to another. 151 153 156
• Processes personal applications before vacant resource slots, requiring a complete source, the applicant's selected time, and an acknowledged cost before scheduling internal verification. 154 159
• Preserves the original order of locked Class Preparations when personal resource use occupies the available recording capacity, accepting a one-slot delay rather than reassigning work without authorization. 157 161 163
• Requires renewed individual consent for every new application, verification slot, substitute arrangement, or continuation; released resources do not automatically create an executor or restore class coordination. 159 161 166
• Uses backup routes and locations only through separate source verification, recognizing that registration alone does not establish possession or eligibility. 166 167 168

Event Exchange and Refusal Protocol

As official Sports Festival lineup and exchange procedures develop, Class D treats every proposed event trade as an individually accountable agreement rather than a blanket class commitment. 170 171

• Separates the target, event, participant, terms, and responsibility for each potential exchange. 170
• Requires the participating student to review and accept the terms personally; their stance does not automatically bind Class D as a whole. 171
• Rejects terms that demand the disclosure of a student's name, training record, handoff weakness, or an ally's confidential source. 171 185
• Uses invalidation clauses and defined risk allocation to prevent an exchange from forcing responsibility onto an uninvolved classmate. 171
• Records refusals and physical limits without treating them as disloyalty or allowing a willing student to assume unlimited obligations. 185
• Accepts empty positions, imperfect redistributions, and projected scoring losses when the alternative would violate consent, privacy, or source-protection boundaries. 171 185

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

Class D subsequently reads the scoring module without declaring a class score or ranking, then opens the formal grouping portal while requiring every student to confirm their own field before it updates any public table. Internal preparation actions remain distinct from official grouping. 138 139 140 144

Formal Grouping and Resource Conflict

As individual Sports Festival applications begin interacting with Class D's limited internal verification capacity, the class allows its personal application sections to operate separately but keeps substitute coordination suspended. It refuses to treat either a reopened personal section or an empty resource slot as full class recovery. 150 151 153 156

Only one personal application can use the current verification resource at a time. Class D records completed reviews, postponed applications, released resources, and continued actions separately, while preserving the original order of its locked Class Preparations. This costs the class parallel processing capacity and leaves its second Class Preparation item waiting. 154 157 159 161

Class C and Class B respond to Class D's public status differently: Class C completes its own locked preparations before returning to observation, while Class B retains public observation but refuses to execute on speculation. Class D does not regard either class's missed opportunity or delayed comparison as its own result. 156 162 163

When the Preliminary Grouping deadline is advanced, Sudo submits a Backup Route after the original backup location has already been registered by Class C. Class D verifies a Second Backup Location separately while the first-row applicant must personally decide whether to close her resource-occupying application. 166 167

The applicant ultimately ends her application and releases the resource, allowing Sudo to review the Second Backup Location. Class D then faces the need to submit an executable preliminary lineup while some personal confirmations remain incomplete. 168

Sports Festival Exchanges and Refusals

Once event exchanges become possible, Class D refuses to adopt a single class-wide position. An unnamed student personally agrees to surrender a Relay reserve position in exchange for a Class B long-distance reserve, but rejects terms that would restrict Class D's future Relay exchanges beyond the current Public Window. 171

The revised exchange is finalized with an invalidation clause: Class D gains the long-distance reserve, gives up its Relay reserve, and temporarily cannot propose a similar second Relay exchange to Class B. The agreement leaves Class D with an empty Relay position, which Class C recognizes as a potential weakness. 171

Class D later refuses Class C's proposed Strength Event exchange because it would require revealing the confidential source of information provided by Ichinose. It redistributes the event among three students with individually recorded limits instead of pressuring Sudo or another student to accept physically unsustainable duties. 185

The refusal protects Class B's information boundary but leaves a visible Strength Event gap. Horikita frames this as an acceptable and manageable loss rather than concealing it or sacrificing a classmate, while Ryuuen shifts toward exploiting the burdens Class D's members have chosen to bear. 185

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
Sports Festival scoring module	Source read; no score or ranking publicly declared by Class D	Class D records only the module's reading status and waits for official grouping before making any public conclusion. 138
Formal grouping portal	Individual confirmation process initiated	Class D confirms the portal and source, but requires students to verify their own fields before public-table updates. 139 140
Sports Festival event-position exchange with Class B	Long-distance reserve received; Relay reserve relinquished	A participating student accepts the revised, time-limited agreement after an invalidation clause is added; the trade leaves an empty Relay position. 171
Proposed Strength Event exchange with Class C	Refused	Class D refuses to disclose Ichinose's information source and instead redistributes responsibilities among three students, retaining a Strength Event gap. 185

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 He later serves as the class's principal procedural boundary-setter, separating personal applications, internal resources, class preparations, public status, and school authority even when that sacrifices efficiency. 154 159 161 163 166
• 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 During the formal-module process, she protects the public boundary, confirms scope without assuming personal responsibility for another student's result, and publicly defines Class D's acceptable losses when exchanges fail. 144 163 166 185
• 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 He later records the separate sources, consent, timing, completion, and continuation conditions of personal applications so that no student's decision is inherited by another. 153 159 161 167
• 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 He continues to test Gu Heng's willingness to accept inefficiency for consent and record integrity, while recognizing that Class D's public wording cannot reveal private responsibility. 159 161 163 166
• 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 He later learns that empty resources and event gaps cannot be filled without renewed consent, independently pursues a Second Backup Location, and accepts physical limits rather than claiming unlimited responsibility for Class D. 156 166 167 185
• 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 During the formal Sports Festival process, his broader recordkeeping system supports the separation of authoritative school pages from Class D's internal and public materials. 137 139
• 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 As the third-row registrant, she voluntarily maintains a publicly disclosed reserved-observation status while preserving the distinction between Class D's confirmations and Class C's actions. 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 It later probes Class D's resource status, registers an earlier backup location that forces Sudo to seek a second route, and attempts to exploit Class D's need to protect personal weaknesses and confidential sources. 163 167 171 185
• 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 During formal Sports Festival procedures, Class B preserves its own confirmation order and observes Class D's public status without treating it as permission to act on Class D's behalf. It later completes a conditional reserve exchange with Class D while protecting its members and Ichinose's information boundary. 156 162 171 185
• 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
• Sports Festival applicants and exchange participants — Unnamed Class D members whose personal confirmations, reviews, postponements, refusals, and exchanges demonstrate the class's later commitment to individual responsibility. Their applications may affect class resources, but neither Class D nor another student may automatically inherit their positions, timing, or obligations. 153 154 159 161 171 185