Ourai no Gahkthun ~What a Shining Braves~

黄雷のガクトゥーン~What a shining braves~

Ourai no Gahkthun ~What a Shining Braves~
TitleOurai no Gahkthun ~What a Shining Braves~
Original title黄雷のガクトゥーン~What a shining braves~
AliasesOurai no N'gah-Kthun, 黄雷的伽克苏恩
LengthMedium (10 - 30 hours)
PublishersLiar-soft & Moe App
Moe Your Sister Chinese
Same series
Shiei no Sona-Nyl -What a Beautiful M...
Shunkyoku no Tyrhhia ~What a Beautifu...
Side story
Ourai no Gahkthun: Shining Night
LinksWikipedia (ja), Wikidata, VNStat
Shops» JP¥ 2933 @ DLsite (jpn)
» US$ 11.98 @ MangaGamer


The year is 1908. The 20th century is still young.
An unfamiliar 20th century - in an unfamiliar world.
This is a world that experienced a 19th century very different from our own. A world filled with innumerable steam-powered "Engines."
The unnaturally rapid development of this steam civilization has left the world's skies shrouded in grey... and its seas dyed black.

"Sea" - Once, the word suggested an expanse of blue. Today, it refers to something dark and putrid.
The former harbor city of Marseille in the European Kingdom of France looks out on a sea as black as any other. But these particular waters are home to something that can't be found anywhere else on Earth...
A massive artificial island, solid and imposing as a fortress. A city in its own right, but also a school; a place bursting with life and color.
Its formal name: The Marseille Offshore Academia.

In the spring of 1908... A single young man appears within its walls.
After declaring his intent to wage war against its powerful Governing Council, he introduces himself in this way:
"Nikola Tesla. 72 years old. I'm a transfer student."
"Students of the Marseille Offshore Academia. My hundred thousand young friends, cursed by fate."
"...I will save every last one of you with my own two hands."

And at the summit of Château d'If, a bell rings out.
The Bell of Gahkthun, announcing that the time of rejoicing is at hand...

Hide spoilersShow minor spoilersSpoil me! | Show sexual traits


Neon Scalar Smiljaネオン・スカラ・スミリヤ
HairDyed, Pink, Sidehair, Straight, Waist Length+
EyesAmber, Slit Pupils
BodyPale, Slim, Young-adult
ClothesApron, Boots, Dress, Pendant Necklace, Ribbon Tie, School Uniform, Skirt
PersonalityAtashi, Hardworker, Hotblooded, Rebellious, Stubborn
RoleEngineer, Friend, Orphan, University Student
Engages inCooking, Fighting
Subject ofBridal Carry
Voiced byIsshiki Hikaru


"If I'm an assistant, then start treating me like one. Please. If you'd be so kind!"

A protagonist and the heroine of this story. The only member of the Detective Club; Tesla's assistant. A girl who's been known to fire off a fierce glare every now and then. First-year student in the Academia's Engine Physics Department; no living relatives. Her hair is dyed a bright shade of pink. Originally, it was brown, just like that of her deceased elder brother.

She was living a harsh life of exploitation as a "second-class student" until Nikola Tesla bought her for the price of 30 silver coins. That's all well and good, but her new position as an assistant with the Speculative Detective Club involves a great deal of hard work for a master who's quite difficult to please. Naturally, Neon isn't entirely satisfied with the situation. But since everything was arranged through official school procedures, she couldn't just walk out the door even if she wanted to.

By nature, she's a strong-willed and tenacious young lady with a rebellious, inquisitive spirit. Unfortunately, she's also a pathologically helpful sort who can't bring herself to turn down a request... And so, despite her dissatisfaction, she finds herself increasingly caught up in looking after Tesla and satisfying his unreasonable demands.

In December several years back, both of her eyes spontaneously changed their color to a striking gold. They now bear an odd resemblance to the eyes of a cat. If angry or displeased, she reflexively narrows her eyes to slits, no matter who she's dealing with. When she's in a really, truly bad mood, her glare can melt glaciers. Better watch your step, wise guy.

[Taken from the English Official Website]

Nikola Teslaニコラ・テスラ
HairAhoge, Short, Spiky Bangs, Teal
BodyPale, Slim, Young-adult
ClothesBelt, Boots, Gloves, Military Uniform, Scarf, School Uniform, Turtleneck Shirt
PersonalityArrogant, Blunt, Confident, Grumbler, Honest, Insightful, Kind, Mysterious, Watashi
RoleBased on a Real Person, Transfer Student, University Student
Engages inBridal Carry, Fighting, Smoking
Voiced byFurukawa Tetsuto


"I bought you for 30 silver coins. In other words, you're mine. Body and soul."

A protagonist and the hero of this story. The first transfer student in the history of the Academia and the president of the Speculative Detective Club (an organization he founded himself). By all appearances, he's a clean-cut young man in early adulthood. Tesla himself, however, claims to be 72 years of age.

His past is full of mystery. Some say he spent years working in a prominent research institution in the USA; others claim that he's a globe-trotting revolutionary with a long history of insurrectionary activities. There are even those who believe him to be a mortal enemy of Lord Edison, a founding father of the United States. Tesla himself refuses to dignify any of these rumors with a response.

On his very first day as a transfer student, he declared the Academia's Governing Council to be his enemy, established the Speculative Detective Club, and stated his intention to lead the entire school down a nobler and more righteous path.

Always overflowing with confidence. Composed and cool-headed. As one might expect of a self-styled 72-year-old, he's oblivious to social rules that would be common sense for most students, and struggles to understand the sensibilities of the young people around him. Despite his flowery talk of ideals, he's not the most compassionate or considerate individual. His assistant Neon suffers lamentable treatment in his employ. However... when someone asks for his help, even a bitter enemy who's attempted to do him harm, he will absolutely never forsake them.

[Taken from the English Official Website]

Main characters

Berta Mori Wiegertベルタ・モリ・ヴィーゲルト
HairBlack, Bob Cut, Short
EyesAmber, Black, Heterochromia
BodyPale, Slim, Young-adult
ClothesCape, Knee-high Boots
PersonalityHonorable, Proactive, Strict
RoleGerman, Kouhai, Senpai, University Student
Engages inFighting
Voiced bySugihara Matsuri


"Have you no shame? If this were the Far East, you'd be cutting your belly open right about now."

One of the six members of the Governing Council. Specifically, he belongs to the "Fraternity," the male wing of the Council. A second-year student at the Academia. By all appearances, a level-headed young man. His temperament is calm; his tone of voice always dispassionate. Hails from the German Empire. His right eye changed to a striking golden color several years ago, but his left remains a deep black.

Extremely knowledgeable about the Orient, particularly the Far East (Japan). It's said that he adheres to the Bushido code and considers himself a samurai.

[Taken from the English Official Website]

Émilie du Châteletエミリー・デュ・シャトレ
HairBlunt Bangs, Braided Headband, Cyan, Ringlet, Sidehair, Straight, Waist Length+
EyesAmber, Blue, Heterochromia
BodyPale, Slim, Young-adult
ClothesBikini, Brooch, Clothing with Ribbons, Dress, Hair Flower, High Heels, Puffy Sleeves, Ribbon Hair Tie
ItemsBow, Rapier, Umbrella
PersonalityArrogant, Refined, Watashi
RoleBased on a Real Person, French, Noble, Senpai, University Student
Engages inFighting, Planning
Voiced byKawashima Rino


"Human beings need to be ruled. It's all that enables us to live as honest men and women, rather than as beasts."

One of the six members of the Governing Council. Specifically, she belongs to the "Sorority," the female wing of the Council. A third-year student at the Academia. Current head of the house of Châtelet, a noble French family. Her right eye changed to a striking golden color several years ago. A refined young woman who's nonetheless exceptionally high-handed; sincerely regards the general student population as her servants. Possesses a private corps of female bodyguards.

Her name is the same as that of her great-grandmother, a famous Erudite Scholar. She takes great pride in this, and anyone who dares disparage her ancestor is met with an eruption of righteous fury. A persistent rumor suggests she's personally acquainted with a certain male student engaging in anti-Council activities, but Émilie herself calls this a "preposterous fiction."

[Taken from the English Official Website]

Florence Ameghino Nightingaleフロレンス・アメギノ・ナイチンゲール
AliasesGoddess, Divine Lady
HairParted to Side, Sidehair, Twin Tails, Violet, Waist Length+
EyesAmber, Heterochromia, Violet
BodyPale, Young-adult
ClothesBikini, Earrings, Kimono
PersonalityCharismatic, Genius, Keigo, Mature
RoleBased on a Real Person, Senpai, Student Council President, University Student
Engages inPlanning, Teasing
Voiced byOukawa Mio


"I'm pleased to make your acquaintance, Nikola Tesla. Welcome to the Academia."

One of the six members of the Governing Council. Specifically, she is the presiding member of the "Sorority," the female wing of the Council. A fourth-year student in the Theology Department and president of the European Religion Research Society. She's believed to hold the rank of Erudite Scholar in the field of Natural History. Her right eye changed to a striking golden color several years ago.

Popularly known as the "Divine Lady," she's widely considered the Academia's foremost woman of letters. A beauty who always appears perfectly composed; even Nikola Tesla's sudden arrival and open declaration of hostility fail to perturb her in the slightest. In fact, she advocates for approval of his extraordinary transfer, and for official recognition of the Speculative Detective Club. For some reason, she's quite taken with Neon, and frequently comes to see her. She actually seems to take pleasure in the way the girl flatly rejects her own invitations.

[Taken from the English Official Website]

Josephine Marchジョセフィン・マーチ
HairAhoge, Brown, Ponytail, Sidehair, Spiky Bangs
EyesAmber, Brown, Heterochromia
BodyBig Breast Sizes, Pale, Slim, Tall, Young-adult
ClothesCuffs, Jumpsuit, Ribbon Tie, Thigh-high Boots
PersonalityAtashi, Blunt, Carefree, Friendly
RoleAmerican, Based on a Fictional Character, Full Sister, Kouhai, Older Sister, Senpai, University Student
Engages inFighting
Voiced byNozuki Mahiru


"I want to show it to my little sister, y'know? Pretty please?"

One of the six members of the Governing Council. Specifically, she belongs to the "Sorority," the female wing of the Council. A second-year student at the Academia. A friendly, frank girl who says what she means and means what she says. Oddly enough, she's quite taken with Transcendentalist thinking. Hails from the United States of America. Her right eye changed to a striking golden color several years ago.

Her sister Amy, younger by two years, is enrolled in the Academia as a first-year student. Jo often talks about how close they are... but in truth, the relationship she describes fell apart more than a year ago.

[Taken from the English Official Website]

Walther Ritzヴァルター・リッツ
HairNo Bangs, Red, Slicked Back, Spiky
EyesAmber, Green, Heterochromia
BodyMole, Pale, Young-adult
ClothesFingerless Gloves, Gloves, Knee-high Socks, Necktie, Trousers, Vest
PersonalityOre, Relaxed, Smart
RoleBased on a Real Person, Senpai, University Student
Engages inFighting
Voiced byMasuoka Yuuji


"Speed... Do you understand its true significance, transfer student?"

One of the six members of the Governing Council. Specifically, he belongs to the "Fraternity," the male wing of the Council. A third-year student at the Academia. Hails from Switzerland. His left eye changed to a striking golden color several years ago.

A quiet and intellectual young man. Presents himself as a calm and composed gentleman, but in truth, he's a obsessive speed freak who possesses an entire fleet of Scholar-class Engine Gurneys (automobiles) imported from the New World. Every weekend finds him racing his vehicles along the private roadway at the Academia's outer edge, a pursuit that inevitably ends in a violent crash - although he always returns home without so much as a scratch.

Bases his enormous ego on the belief that he's living his entire life in high gear. Wears a customized pair of boots containing a mechanized roller-blade system; he refers to them as the "Silver Shoes."

[Taken from the English Official Website]

Wilhelm Reichウィルヘルム・ライヒ
HairBrown, Short
EyesAmber, Blue, Heterochromia
ClothesBelt, Bolo Tie, Cape, Glasses, Shirt, Trousers, Watch
ItemsKnife, Sword
PersonalitySecretive, Serious
RoleBased on a Real Person, Senpai, University Student
Voiced byMunakata Jin


"Our eyes must remain fixed on our goal. The Bell of Gahkthun will only ring if offered a truly sacred gift."

One of the six members of the Governing Council. Specifically, he is the presiding member of the "Fraternity," the male wing of the Council. A fifth-year student in the Engine Physics Department, regarded as the true ruler of the Governing Council. His left eye changed to a striking golden color several years ago. Joined the Governing Council as part of his search for the golden power of "Orgone." He believes this cosmic force to be a manifestation of bliss itself.

He is one of very few - even among the Council - who knows the Academia's real nature. Possesses a direct relationship with the "Society" that is the true power behind the city. In the spirit of chivalry, he accepts Florence's generous proposals regarding Nikola Tesla without a second thought. In his own words: A man who so boldly challenges the Council deserves a certain amount of special treatment, if not an entirely even playing field...

[Taken from the English Official Website]

Side characters

Annabeth William Murdoch Jrアナベス・ウィリアム・マードックJr
HairBlond, Long, Sidehair, Wavy
BodyPale, Slim, Young-adult
ClothesCoat, Gloves, Goggles, Knee-high Boots
PersonalityFriendly, Proactive, Rebellious
RoleCanadian, Engineer, French, Kouhai, Senpai, University Student
Voiced byHaruna Ren


A third-year student at the Academia who is half-Canadian, half-French.

Makes an appearance