Kitagawa Kai

Biodata

Feature	Details
Name	Kitagawa Kai (北川介) 10
Alias(es)	Kai-kun; Boyfriend-kun; “General” to Morishita Ai 76 94 229
Gender	Male
Affiliation	Advanced Nurturing University; initially First-Year Class B, later First-Year Class A; Student Council 10 177 221
Occupation/Role	Student; Student Council President 221
Academic Assessment	Academic Ability B; Intelligence, Judgment, Physical Ability, and Teamwork C on his enrollment record 10

Power Progression

Stage / Realm / Level	Chapter	Notes
Stamina 7; Intelligence 6; Charm 8	22	System interface identifies him as above-average in endurance, superior to ordinary people intellectually, and eye-catching in charm. Listed abilities include Affinity, Master-Level Chess, Narrator, Shoulder Throw, Master-Level Painting, and Wilderness Survival Expert.
Intelligence 7; Master-Level Combat obtained	40	Intelligence reaches “Genius”; Master-Level Combat is added to his listed abilities.
Stamina 8; Charm 9	68	Stamina becomes “Inhuman” and Charm “Peerless.” He also possesses 2% of Suzuki Conglomerate shares.
Stamina 9; Intelligence 8	96	Stamina and intelligence rise to “Peerless” and “Inhuman,” respectively. His expanded skill set includes Master-Level Fishing, Cooking, Photography, and Presence Control Technique.
Stamina 10	166	Stamina reaches “Superhuman.” He possesses Transformation Rings and several additional system abilities.
Charm 10	204	Charm reaches “Extraordinary.” He also has Master-Level Speaking Ability and 3% shares in the Mitsui Conglomerate.

Background

Kitagawa remembers a past life and regards his current life at Advanced Nurturing University as far more eventful than the one before it 170. He has access to a private system interface that records his attributes, abilities, items, and the Affection Levels of girls around him 22.

His official enrollment profile presents him as unremarkable: an ordinary Class B student with no exceptional strengths and a tendency toward unconventional thinking. Sakayanagi Arisu finds that assessment suspicious enough to request a full investigation into him shortly after meeting him 10.

Appearance

Kai is repeatedly noted for an exceptional appearance and a composed, languid presence that draws attention even before others learn of his abilities 10 25.

• Broad shoulders, narrow waist, and sharply defined but proportionate musculature from consistent training 25
• A restrained, quiet physical presence contrasted with an aggressive edge when he becomes serious 21 67
• Often described as strikingly handsome by classmates and acquaintances 21 38

Personality

Kai is confident, playful, and highly opportunistic. He readily turns social situations to his advantage, whether by leveraging points, provoking rivals, or using flattery and pressure during negotiations 61 211. He is candid about his desire to maintain relationships with multiple girls and does not conceal his possessiveness when challenged 150 158.

Despite this self-serving streak, he is observant and attentive to individual needs. He supports Horikita Suzune through her conflict with Manabu, gives Ichinose Honami respite from leadership duties, protects Sakura Airi, and carefully remembers Tachibana Akane’s preferences during their date 51 116 84 231. His sincerity can be disarming even when his methods are questionable 190 191.

Abilities & Skills

Affinity and Charm

Kai possesses the system ability Affinity and an exceptionally high Charm stat, allowing him to build trust and attraction unusually quickly.

• Ichinose’s Affection Level rises after their first shared breakfast and conversation 10
• Asahina Nazuna feels unexpectedly familiar and reassured while speaking with him shortly after meeting him 177
• His Charm ultimately reaches 10, classified as “Extraordinary” 204

Combat and Physical Ability

Kai is a master-level combatant whose physical performance surpasses ordinary students.

• Effortlessly restrains and defeats Ryuen Kakeru during their confrontation 43
• Defeats three attackers while protecting Sakura Airi 83
• Runs 100 meters in 8.52 seconds at the Sports Festival 179
• Completes the exploration and occupation of all 21 island outposts in roughly three hours 107
• Offers to teach Class B basic self-defense techniques after the Ryuen incident 43

Presence Control Technique

Kai can reduce his presence through a biological “field” that extends several meters around him.

• Uses the technique to avoid notice alongside Kamuro Masumi, describing it as effectively achieving group invisibility 170
• Employs the field while investigating Morishita Ai in the woods with Karuizawa Kei 216

Wilderness Survival and Environmental Knowledge

Kai’s survival expertise is particularly valuable during the Uninhabited Island Exam.

• Recognizes much of the island’s flora and fauna 116
• Optimizes travel routes through forests, ravines, plains, and coastlines while memorizing the terrain 107
• Carries Ichinose up a steep rock face while continuing their exploration 116

Academic and Specialist Skills

Kai possesses a broad range of master-level skills alongside enhanced memory and reasoning.

• Solves difficult mathematics problems for Shiranami Chihiro and Amikura Mako 260 257
• Finishes Magpie Murders in less than an hour and discusses its mystery structure with Shiina Hiyori 208
• Holds Master-Level Chess, Painting, Cooking, Fishing, and Photography skills 22 96
• Uses Master-Level Speaking Ability to rally students during the Student Council election 204 221

Medical and Bodily Control

Kai demonstrates unusual medical knowledge and control over his own body.

• Treats Chabashira Sae’s twisted ankle using bone-setting skill 191
• States that he can consciously control his body’s responses 151
• Claims to possess a special ability that prevents pregnancy 257

Equipment / Assets

• Universal Video Recorder — Used to record evidence against Karuizawa Kei’s attackers 22 138
• Suzuki Conglomerate shares — Holds 2% of the conglomerate’s shares 68
• Mitsui Conglomerate shares — Holds 3% shares by Chapter 204 204
• Heart Repair Elixir — Restorative medicine used in Sakayanagi Arisu’s treatment 96 158
• Transformation Rings — A set of 100 symbiotic rings with a special connection; Kai uses their tracking function to locate Tachibana Akane 166 224
• Prank Dice — Received through Karuizawa Kei’s Affection Level reward 139 166

Relationships

• Ichinose Honami — Classmate, public girlfriend, and later Student Council secretary. She confesses her wish to marry him during the island exam 116 152 215.
• Horikita Suzune — Romantic partner whom Kai supports through her strained relationship with Manabu; their relationship is later openly acknowledged to her brother 51 212.
• Kushida Kikyo — Kai learns her hidden nature and chooses not to expose it. Their relationship begins after she confides her past to him 67 68.
• Sakayanagi Arisu — Initially investigates him out of interest, then becomes close to him while he helps improve her physical condition 10 94 158.
• Kamuro Masumi — A competitive romantic partner whose dynamic with Kai is marked by arguments, teasing, and mutual attraction 78 170.
• Sakura Airi — Kai protects Airi, supports her “Shizuku” persona, and accepts her confession when she asks to join his group of girlfriends 84 169.
• Karuizawa Kei — Kai rescues her from bullying, becomes her confidant, and later dates her while discussing his future plans 138 140 151.
• Shiina Hiyori — Reading partner and girlfriend. Their shared mystery-novel discussions lead to Kai’s confession and their first kiss 207 208 260.
• Tachibana Akane — Student Council senior who officially becomes Kai’s girlfriend; he later takes her on her first official date 168 224 230.
• Yamamura Miki — A close romantic partner who grows more expressive around him and regularly seeks time alone with him 128 187.
• Morishita Ai — Self-proclaimed subordinate who calls him “General” and seeks to become his “pet”; she later serves in the Student Council under him 216 229.
• Chabashira Sae — Initially hostile Class D homeroom teacher. Kai helps her confront past regrets and later develops a reciprocal relationship with her 190 191 254.
• Horikita Manabu — Former Student Council President and Suzune’s protective older brother. After confronting Kai over Suzune, Manabu supports his presidential candidacy 211 212.
• Nanumo Miyabi — Former vice president and Kai’s opponent in the Student Council presidential election 152 221.
• Ryuen Kakeru — Initially a hostile rival whom Kai defeats; later a political adversary during the election campaign 43 209 210.
• Hirata Yosuke — Entrusts himself and Class D to Kai’s arrangements in exchange for help reducing expulsions 253.
• Asahina Nazuna — Upperclassman and Nanumo’s childhood friend who asks Kai to challenge Nanumo for his own growth 177.

Story Role / Major Arcs

Class B Beginnings

Kai enters Advanced Nurturing University as a seemingly average Class B student. He quickly befriends Ichinose, earns Sakayanagi’s interest, and begins attracting attention from classmates through his appearance and social ability 10. His defeat of Ryuen establishes him as Class B’s foremost physical protector and discourages further direct intimidation against the class 43.

Uninhabited Island Exam

During the island exam, Kai explores and occupies all 21 outposts in a single morning, giving Class B a major strategic advantage 107. He also gives Ichinose time away from her leadership burdens, takes her to the island summit, and accepts her confession 116. By the following semester, he is recognized as having led his class to an overwhelming victory and its promotion to Class A 177.

Sports Festival

Kai’s athletic feats become public during the Sports Festival. He wins the 100-meter race in 8.52 seconds and later completes the Borrowing Race by carrying Chabashira Sae across the field after she refuses to cooperate 179 189. The latter incident draws schoolwide attention and begins a more personal connection between the two 190 191.

Student Council Campaign

After becoming vice president with Ichinose as his secretary, Kai prepares to challenge Nanumo Miyabi for the presidency 152. He secures Class D’s 36 votes, courts upperclassmen through jobs and confidentiality agreements, and seeks Horikita Manabu’s support 158 207 211. His campaign culminates in a speech arguing that ability should not be defined solely by grades, class rank, or physical talent; he wins the election against Nanumo 221.

Presidency and Reform

Kai’s presidency begins with a mass withdrawal of second-year Student Council members led by Nanumo, though Kiriyama Ikuyo and Takenaka Kazuki remain loyal 224. He expands the Discipline Committee, appointing Hirata Yosuke as chair and seeking Katsuragi Kohei’s cooperation to address violence and misconduct 226. He also brings Class D under his guidance for future special exams, creating a cooperative alliance between the two classes 253 268.

Notable Quotes

“Everyone, I've seen people who clearly had talent, yet were buried simply because they came from Class D.” 221

“Each and every one of you is a special existence to me; I don't want to let go of anyone.” 150

“Points aren't meant to be spent on girls; they're meant to be shown to girls...” 128

Trivia

• Kai’s official assessment rated his Physical Ability at C, despite his later superhuman athletic performance 10 166.
• He has an enormous appetite and unusually high metabolism 168.
• He painted a handmade portrait for Ichinose Honami’s birthday 97.
• Morishita Ai addresses him in military terms, progressing from “General” to treating herself as his corporal and lieutenant 229 242.