Shiraishi

Biodata

Feature	Details
Name	Shiraishi Makoto (白石 真)
Alias(es)	Little Shiraishi; “White Stone Boy”
Gender	Male
Affiliation	Advanced Nurturing High School; Class A (formerly Class B); Student Council
Occupation/Role	Student; Class A leader; Student Council President
Status	Active
First Appearance	Chapter 1

Background / History

Shiraishi is a transmigrator who begins his first day at Advanced Nurturing High School without the original owner’s memories. Rather than openly announce what he learns, he observes the school’s systems and leaves indirect clues for other students to discover. He quickly identifies the importance of Private Points, Class Points, and the benefits reserved for Class A graduates. 1 3

After confirming the school’s hidden rules with Hoshinomiya Chie, Shiraishi works with Ichinose Honami and Kanzaki Ryuji to brief his class. He proposes a Class Fund to prepare for future expulsions, and his classmates entrust its management to him. 4

As his influence grows, Shiraishi becomes a Student Council member and later uses that position to investigate disputes, access institutional channels, and recruit representatives from every class. He is promoted to vice president under Horikita Manabu, then succeeds Manabu as Student Council President. 18 109 141

Shiraishi’s strategy repeatedly centers on converting information into leverage. He makes conditional agreements with Sakayanagi Arisu and Ryuen Kakeru, obtains evidence against Class C’s scheme against Sudo Ken, and uses it to secure future Class Points rather than immediately expose Ryuen. 17 45 48

During the first Uninhabited Island Exam, Shiraishi leads Class A’s operations, counters Ryuen’s leader-switching scheme, and temporarily becomes Class D’s replacement leader before withdrawing. The maneuver limits Class D’s losses while preserving Class A’s advantage; Class A finishes the exam with 460 points and rises to 1,710 total Class Points. 67 68

He later consolidates Class A by recruiting Katsuragi Kohei for 20 million Private Points and transferring Kushida Kikyo, Karuizawa Kei, and Sakura Airi into Class A for 60 million Private Points. 217 267

Personality

Shiraishi is calm, observant, and unusually aware of his own limitations. He avoids needless confrontations with stronger opponents, preferring agreements with figures such as Ayanokoji and Sakayanagi over reckless rivalry. 33 40

He is pragmatic to the point of ruthlessness. Shiraishi blackmails Kushida, treats surveillance footage as a bargaining asset, and is willing to let hostile plans continue when they may reveal a larger threat. 22 45 248

Despite this, he consistently protects people he considers important. He exposes Sakura’s stalker, safeguards her identity, arranges Karuizawa’s injury assessment, and accumulates Private Points partly to secure the futures of Sakura, Kushida, and Karuizawa. 18 84 80 267

Abilities & Skills

Strategic Analysis

Shiraishi rapidly identifies hidden rules, motives, and exploitable weaknesses in both people and systems.

• Deduced the school’s Class Point system and the competition between classes within his first days at school. 3 4
• Identified Ayanokoji as an abnormal student after investigating his perfectly average entrance scores. 40
• Predicted leader-switching tactics during the Uninhabited Island Exam and used withdrawals to manipulate leader identification. 67 68
• Recognizes that information is often more valuable as leverage than as immediate proof of wrongdoing. 45

Negotiation and Political Influence

Shiraishi turns evidence, points, and alliances into formal advantages for Class A.

• Rejected Sakayanagi’s initial offer and obtained access to Kamuro Masumi and Chairman Sakayanagi as compensation. 17
• Negotiated a contract forcing Class C to provide Class A with 300 Class Points through future exams or intelligence. 48
• Sold Class A’s VIP information before rival classes could expose it without compensation. 79 80 84
• Recruited Katsuragi by offering him a transfer to Class A and a chance to challenge Sakayanagi directly. 217

Surveillance and Evidence Handling

Shiraishi regularly employs covert recordings and official procedures to establish control over volatile situations.

• Recruited Kamuro for covert photography due to her ability to evade surveillance. 18
• Exposed Sakura Airi’s stalker through evidence gathered from the electronics-store clerk’s phone. 18
• Obtained footage connecting Ryuen to the staged assault accusation against Sudo. 45 48
• Used recordings of Hosen attacking Ayanokoji to force Hosen into an exam team and secure Class 1-D’s cooperation. 261

Leadership and Resource Management

Shiraishi combines long-term planning with strict rules for how Class A’s resources may be used.

• Created and managed the Class Fund after his classmates accepted his proposal. 4
• Refused to use Class Funds for personal or inter-class objectives, even while saving points to protect Sakura. 80
• Led Class A to substantial gains during the Uninhabited Island Exam, personally contributing more than 350 Class Points. 73
• Recruited Student Council members from multiple classes to prepare first-years for possible cross-grade cooperation. 101

Athletics and Combat

Initially only somewhat above average physically, Shiraishi deliberately trains to compensate for that limitation.

• Served as a setter in the first-year volleyball victory over Nagumo’s team, using team selection and court positioning to avoid his weaker reception ability. 105
• Began sustained sparring and combat training under Ayanokoji, later supplementing it with practice against Kanzaki. 191 198
• Develops enough skill to withstand training calibrated toward White Room-level opponents, though his goal is defense rather than surpassing them. 229
• Defeats Nanase Tsubasa through defense, pressure, psychological analysis, and exploitation of her declining stamina. 264 265
• Remains below exceptional fighters such as Ayanokoji and Kouenji. 264

Chess

Shiraishi begins as a novice but treats chess as an area for deliberate improvement.

• Described himself as a beginner after studying chess for roughly one year. 39
• Was defeated by Sakayanagi, who later pushes him toward Candidate Master level. 40 230
• Participated in a deliberately manipulated chess match with Sakayanagi to obtain Protection Points. 226

Relationships

• Ichinose Honami — Class A’s social core and Shiraishi’s closest leadership partner. She helps organize the class, later becomes his romantic partner, and is appointed one of his vice presidents. 4 141 204
• Sakura Airi — Shiraishi protects her from a stalker, keeps her identity as “Shizuku” confidential, and helps her grow more confident. Their relationship is confirmed when they share their first kiss. 18 29 141
• Kushida Kikyo — Initially a coerced informant whom Shiraishi controls through evidence of her hidden personality. Their relationship later becomes closer, though it remains shaped by secrets, mutual manipulation, and jealousy. 22 90 147
• Karuizawa Kei — An ally whom Shiraishi supports during her conflict with Class C and later transfers into Class A for protection. 84 218 267
• Ayanokoji Kiyotaka — Strategic counterpart and non-aggression partner. Shiraishi knows of Ayanokoji’s White Room background, trains under him, and cooperates with him against outside threats. 20 40 191 267
• Sakayanagi Arisu — Intellectual rival, occasional ally, and chess opponent. Their relationship is transactional but marked by mutual respect and recurring competition. 17 40 217
• Kanzaki Ryuji — Trusted Class A collaborator who assists with intelligence, class operations, and later combat training. 4 58 198
• Horikita Suzune — Initially a target of Shiraishi’s pressure on Class D; their relationship develops into a pragmatic mentor-and-student dynamic within the Student Council. 53 73 109
• Ryuen Kakeru — Rival strategist whom Shiraishi repeatedly forces into unfavorable agreements. Ryuen comes to view him as a major opponent worth facing for the rest of their school years. 48 67 126
• Horikita Manabu — Student Council mentor who approves Shiraishi’s investigations, promotes him to vice president, and entrusts him with the presidency. 45 109 141
• Nanase Tsubasa — Initially an opponent targeting Ayanokoji; after Shiraishi defeats her and exposes Tsukishiro’s manipulation, she joins his side and gathers intelligence on suspected White Room students. 264 265 267

Story Role / Major Arcs

Early School Year

• Identifies the school’s hidden systems and organizes his classmates around a Class Fund. 3 4
• Joins the Student Council and begins building a covert network with Sakayanagi and Kamuro. 17 18
• Uses Kushida’s secret to infiltrate and destabilize Class D from within. 22

Sudo Incident and Uninhabited Island Exam

• Investigates Class C’s staged assault accusation against Sudo and turns the evidence into a contract benefiting Class A. 45 48
• Leads Class A through the Uninhabited Island Exam, counters Ryuen’s operations, and preserves Class A’s lead. 58 67 68
• Uses the leader-switching rules to reduce Class D’s penalty after Horikita’s withdrawal. 67

Student Council Expansion

• Sells VIP information to convert a likely loss of Class Points into Private Point income and political leverage. 79 80 84
• Recruits representatives from other classes and becomes Student Council vice president. 101 109
• Succeeds Horikita Manabu as Student Council President and appoints Kiriyama and Ichinose as vice presidents. 141

Class Consolidation

• Prevents Ryuen from withdrawing and secures Class C’s future assistance in exchange for secrecy around Ayanokoji. 162
• Recruits Katsuragi into Class A, strengthening the class for its direct competition with Sakayanagi. 217
• Transfers Kushida, Karuizawa, and Sakura into Class A to remove them from vulnerable positions. 267

White Room Conflict

• Allows Tsukishiro’s bounty on Ayanokoji to proceed in hopes of drawing out a White Room agent. 248
• Uses Hosen’s attack on Ayanokoji as leverage to impose an alliance rather than seek immediate expulsion. 261
• Defeats Nanase and persuades her that she was manipulated into targeting the wrong person. 264 265
• Works with Ayanokoji and Nanase to investigate Yagami, Amasawa, Utsunomiya, and Tsubaki as possible White Room affiliates. 267

Notable Quotes

“This is why you’re in Class D.” — to Horikita Suzune after she criticizes his deal with Class C. 68

“Too slow.” — during his fight with Nanase Tsubasa. 264