Shiro Kisaragi

In a universe watched over by The Observer, seven flawed worlds hang in delicate balance. To protect humanity from the monstrous forces that roam the land, the gods gave the ultimate sacrifice—offering themselves to humans and becoming divine companions within them. Shiro, a determined young man, earns a place at the world’s top academy, seeking strength and answers about his parents’ mysterious disappearance. But when he angers a selfish god, he’s cursed with a power that could become the very death of him—a punishment no one has ever survived. Feared, marked, and alone, Shiro must fight to control his curse, uncover the truths hidden across the seven worlds, and rise beyond what the gods intended.

A man rejected by the will of the world he grew up in for all of his life, and a genius with infinite potential who fell as a result of making a risky bet. Under the machinations of the deceased Heavenly Emperor, Huang Xian, two unfortunate souls from entirely different worlds got saved and fused together into a new whole, adopting the identity of the latter–Theodore Winter, the heir to one of the Supreme Pillars of the Heavenly Court. As an eon-spanning competition to decide the next generation of Heavenly Emperor and Heavenly Empress began, it brought with it a game of wits, power and plots that would shake the Heavenly Court to its core. Reincarnators, Transmigrators and Regressors were barely qualified to chase after the unprecedented monsters that had been brought into being for the express purpose of rising above the rest. Battles between peers were like peeling an onion–nobody ever knew just how many cultivation realms and Talents the other had hidden away to catch his opponents off guard. With a saint-like image and the heart of a devil, Theodore Winter entered the fray. Unbeknownst to all, other than returning triumphantly, he was entrusted with another task: To kill Huang Xian’s murderer–his wife, the Heavenly Empress! ------------------------- Read advance chapters (by paying for my meals) on Patreon: • https://www.patreon.com/sh1ro My novel series "Reincarnation Cycle's Unfortunate Bug" on Amazon: • https://www.amazon.com/dp/B0CYHGRR8M/ Discord Server (currently under construction): • https://discord.gg/NdAjjmXSDh ------------------------- Hi there, this is Shiro / the author. Just one little cautionary warning here: Due to being set in an entirely alternate world from ours, while some terms and concepts might seem familiar at first glance, many in actuality are not. In canon, the World's Will of a world exactly like our own 'got inspired' by memories that it secretly glimpsed from the Heavenly Emperor, thereby creating extremely loosely related concepts in its own universe. So never expect anything to work in the same way as something that you are already familiar with, because chances are very high that it won't be the same at all. (Yes, I just blatantly flipped the script.) I hope you'll enjoy The Heavenly Empress' Assassin! ------------------------- Current Release Schedule: • 4 chapters per week • 1 chapter every Monday, Wednesday, Friday and Sunday (at ~11 p.m. GMT+1) (More chapters can appear as bonus chapters, so this is the absolute minimum.) • Vote with Power Stones to read more chapters in the week after the results are in! -> Top 100: +1 chapter -> Top 50: +2 chapters -> Top 10: +3 chapters -> Top 5: +4 chapters -> 1st Place: +5 chapters - Chapter length: ~2k words on average

“On Nexus—a world ten times bigger than Earth where gods, beasts, witches, and much more run wild—power is everything. And Shiro? He does what he wants… and he’s got the hands to back it up.” Dark-skinned, handsome and grinning with two shining gold fangs, Shiro walks like a king without a crown. His long white dreads swing like a wild mane behind him. His custom wolf-hide gauntlets click softly as he stretches his fingers, ready to crack skulls—or gently grab the thick waist of the next dangerous beauty who tries him.

In the isolated coastal town of Kurohane, eerie spiral patterns begin appearing everywhere—on walls, in trees, even in people’s reflections. When Renji Kisaragi, a skeptical high school journalist, returns home after hearing about his brother Shun’s sudden and mysterious death, he finds himself trapped in a nightmarish time loop. Every time he dies, time rewinds—resetting two days earlier. But with each reset, reality twists further: people disappear, time fractures, and his own body begins to change. As he searches for the cause, he discovers his estranged father, Kaoru Kisaragi, may have been the one who triggered the loop. Aided by his childhood friend Aoi Tsukimura, who holds secrets of her own, Renji must uncover the mystery of The Spiral Gate before it consumes everything. But some truths are worse than death. And the entity behind the spirals does not want to be stopped. Renji must make an impossible choice: sacrifice himself to break the loop—or risk losing his humanity to escape.

Fukushū no Kage It is a novel that follows the story of Haruto Akiyama, a young man who, after moving to a new city, finds friendship, love, and moments of happiness during his time at Shiroi Academy. With the help of his four friends—Renji, Mikasa, Yuta, and Emi—Haruto experiences unforgettable moments, facing school challenges and creating valuable memories while discovering the true meaning of friendship and hope. Publicaré esta historia en RoyalRoad.com también ..

Gehrman Zhorn, hijo de una madre prostituta y un errante pirata, nació en el puerto y pueblo de Sarajo. Vivió una infancia amorosa y feliz, hasta que, a los nueve años, una enfermedad derivada del oficio de su madre lo dejó completamente solo. ¿Qué será de él? ¿Qué aventuras le esperan en el vasto mundo?

Nada volvió a ser igual para Yomi Desde que a Tsuki sin vida encontró Lo señalaron como suicidio Pero a ella no le convenció Desorientada entre la noche buscó consuelo No se imaginó nunca que la Luna querria ayudarla con su duelo Un trato sellado en silencio Un nombre nuevo Un cuerpo ajeno Para hallar la verdad... Yomi tendría Que Desaparecer Primero....

Content Warning: This story contains graphic depictions of violence, intense emotional struggles, and mature themes. It explores complex character conflicts, dark fantasy elements, and supernatural themes. Reader discretion is advised. In a world where emotions shape reality, Yūgensekai is split between realms of light and darkness. Each place reflects the inner battles of its people-where fear can give birth to monsters, and hidden desires can tear lives apart. Kuru Aoshima is a young woman trying to find her place in this fractured world. With a past full of loss and mystery, she's on a journey not only to uncover the truth about the world around her but also about herself. She's haunted by her own doubts and struggles, torn between the darkness within her and her search for clarity. In a world where your feelings can turn into powerful, dangerous forces, keeping control isn't just a matter of survival-it's about holding on to who you are. Facing powerful enemies like Raikou Saito, the ruthless leader of a syndicate that trades in suffering, and Serena Akihara, a leader torn by her own inner conflicts, Kuru's journey is full of heartbreak, violence, and moments that test her spirit. As she fights for answers, she is constantly on edge, pushed to the limit, both physically and emotionally. Bloodied and broken, she refuses to give up. But in a place like Yūgensekai, where darkness and light are always at war, how much of yourself can you lose before you're gone forever?

Humanity was slaughtered over the course of 5 days. Shiro was one of them. But his "death", happened to be one of a different circumstance. Transported to another world, he strives to find the cause.

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Itsuki Aoi, a quiet and introverted 17-year-old student, lives his days unnoticed and alone. That quiet life begins to shift when Shizune Kisaragi — a well-known young actress shrouded in scandal — transfers to his school and ends up sitting right beside him in class. From awkward conversations in the library to soft laughter over favorite anime, their seemingly ordinary interactions begin to bring color into each other’s monochrome days. But how deep can their connection go, when they come from two entirely different worlds?

Cuando Ryota Kisaragi, un joven jugador profesional de MMORPGs, es transportado a un mundo de fantasía tras aceptar un misterioso mensaje en su pantalla, cree haber conseguido el sueño de cualquier gamer. Sin embargo, en lugar de convertirse en el héroe destinado a salvar el reino, despierta como un "Portador del Caos", una existencia temida y rechazada por la humanidad. Dotado de habilidades que devoran la energía vital de quienes lo rodean y marcado como una amenaza, Ryota es perseguido por los caballeros del reino y los clanes de aventureros. Su única opción es unirse a los marginados: razas prohibidas, mercenarios sin honor y criaturas consideradas monstruos. Mientras descubre la verdad detrás de su invocación y la corrupción oculta en el mundo, Ryota deberá decidir si se convierte en el salvador que todos temen o en la calamidad que destruirá todo a su paso. Con aliados inesperados y enemigos que surgen en cada sombra, su destino es incierto... pero una cosa es segura: este no es el típico viaje de un héroe.

After a mysterious explosion leaves him bleeding and broken, hikikomori Shiro Umemiya wakes up in a hospital—only to face mysterious nightmares and a stranger who claims to be a god. But when the boundary between worlds shatters, hurling him into an alternate world, Shiro realizes one thing: he must fight his way back home, no matter the cost.

Yuto Kisaragi, siswa biasa yang hobi main game RPG dan berburu roti isi tuna promo, mendadak meninggal dengan cara yang... konyol. (Tersedak sambil nge-raid dungeon di toilet?!) Tapi takdir berkata lain. Ia malah mendapat tawaran dari seorang Dewa Ceroboh: reinkarnasi sebagai karakter “Experimenter” di dunia RPG eksperimental bernama Altheria! Tanpa kekuatan langsung, tanpa skill serangan, dan hanya bersenjatakan pisau roti... Yuto harus bertahan di dunia penuh monster, quest absurd, dan sistem yang sering nge-bug. Namun, ia punya satu keunggulan: kemampuan untuk membuat skill sendiri dengan menggabungkan efek dan sihir apa pun! Dari skill teleportasi sambil makan, hingga jurus "Ledakan Roti Isi", semua mungkin—asal nekat dan lapar! Dunia baru, petualangan baru, dan roti isi yang lebih enak dari dunia nyata. Inilah kisah petualang paling absurd yang pernah kamu baca.

[Warning: Mature, sensual content, lots of smut and a very tight plot!] "So many beautiful girls!" After an unfortunate science experiment gone wrong, 25-year-old virgin Ren Kisaragi, wakes up in a strange new world. A world where curses manifest as eldritch horrors, bringing destruction with every breath. A world where female weavers command the very laws of reality and bend the elements to their will, while male warriors, blessed with monstrous strength, can shatter mountains with a single blow. It doesn’t take long before he realizes he has reincarnated into "Mystic Chronicles", a fantasy novel he once read and dropped out of boredom. However, he isn't the protagonist or even a side character, he’s just a nameless extra, a mere background figure destined to fade into obscurity. But there’s one problem. He’s somehow enrolled at Imperial Academy, the most prestigious weaver academy in the kingdom… which is supposed to be an all-girls school! And as the only male weaver in an entire academy of talented (and terrifying) female weavers, his existence alone is enough to shatter the balance of the world. With a suspiciously broken cheat, an entire school of powerful and competitive girls watching his every move, and curses lurking in the shadows, Ren must navigate this chaotic new life before he gets caught up in a story that was never meant to include him. But maybe—just maybe—he can turn this anomaly into an advantage. And if fate allows, fulfill his lifelong dream of being surrounded by beautiful, ambitious women while he's at it. Can he survive this world where he's the ultimate anomaly? ——— Support Table. Every 100 PS or GT: 1 Bonus Chapter. Castle: 5 Bonus Chapters!

Not every other world was meant to save you. Some were built to punish what reality couldn't touch. Once feared as the ruthless king of Otemae High, Shiro Hoshigaki controlled everything until an encounter with the quiet but unbreakable Daiki fractures his dominance. As the ghosts of his past creep closer, Shiro is thrust into an isekai realm beyond death—a world shaped by karmic law, where souls are judged, and punishment is absolute. Now bound to NirVana, an unforgiving land ruled by the God of Death, Shiro must navigate horrors beyond human comprehension. His sins are no longer whispers in the past—they are chains around his throat, pulling him into a spiral of supernatural torment. If he hopes to survive, he must master Weavecraft, a karmic power system where every action has consequence, and Kegou, the force entwined with his very existence. But survival is not the endgame. As divine forces, twisted souls, and the weight of his own cruelty close in, Shiro must answer the ultimate question: Can redemption exist for the

As Leo stormed into the room, a furious frown etched on his face, he stared intently at him. Finally, he grabbed Shiro's arms, squeezing them tightly. "You're hurting me!" Shiro exclaimed. "Why did you interfere?" Leo demanded, his voice sharp. "I told you clearly to stay out of this! I repeated it to you a hundred times, and yet you still decided to get involved. Can't you listen to me?" "If I hadn't done anything, wouldn't you be locked up right now, starving and freezing in prison?" Shiro retorted. "I did it because I was worried something would happen to you!" "You don't understand," Leo insisted. "No matter what happened, I'd have been fine! They wouldn't dare touch me! You, however, have no title! You have no protection! You can't even defend yourself! What would you've done if something happened to you?"

"Behind the smile is silence. Behind the silence is death." --- Silas Creed is perfect. White hair, golden eyes, beloved by all. A model student. A charming friend. A ruthless serial killer. Behind the flawless smile lies something hollow—something cold enough to torture, kill, and livestream it all without blinking. He doesn’t discriminate: men, women, children, elderly—all are tools in his quiet war against the world. His goal? > Ten million deaths before he turns twenty. The world adores him. Only one woman sees the truth: Naomi Kisaragi, a hardened investigator obsessed with unmasking the smiling god of slaughter. But catching Silas isn't justice. It’s personal. --- The Hollow Smile is a chilling descent into the mind of a boy without empathy, a society that never noticed, and the woman racing to stop him before the world becomes his final masterpiece. ---- Written by FatexDestiny with the help of AI Genre: Psychological Thriller · Mystery · Action · Horror Tone: Dark · Gory · Gritty · Emotionally Heavy Arc 1 World Before The Flames ( Ended) Arc 2 Ashes Of Aetherion ( Starts)

For seventeen years, Samantha Kisaragi wished for only one thing: a normal life, free from the chronic illness that made her a fragile glass doll in her family’s eyes. One morning, her wish is granted by... a tiny, floating mochi with a god complex? This smug spectral "System" offers her a miraculous, perfectly healthy body. The price? She must now complete a series of insane missions, from the mortifying to the life-threatening. The rules are simple: succeed and level up. Get stronger, faster, and maybe even a little more charming. But if she fails, the penalty is a fate worse than any illness: her body will warp into a 'Cursed Physique'—a seven-foot-tall mountain of grotesque muscle powered by the same old fragile constitution. A titan's strength with a body that could collapse from a stiff breeze. Now, this former shut-in is being forced to get buff, all while juggling a top-priority quest to save her perfect older brother from a shadowy, five-star threat hunting him down. And as if that's not enough pressure, the System is also demanding she "Ignite the Flames of Passion" and make someone fall in love with her, pushing her into ridiculously close and awkward situations with her bubbly best friend. With only a cheeky floating dessert for a guide, a terrifyingly competent senior known as the 'Ice Queen' as an unlikely ally, and a clock ticking on both her brother's life and her own romantic prospects, Samantha must learn to be a weapon. She was a girl who just wanted to be normal. Now, she has to become a monster to protect everything she loves.

Kisah 12 Makhluk yang berdiri diatas puncak kekuasaan. Makhluk-makhluk yang naik ke tempat paling tinggi diseluruh Dimensi. Dengan kecedasan, kelicikan, kekuatan daya tarik dan ambisi. Awal mula terciptanya 7 makhluk Ilahi. Seorang pemuda yang menaklukan jagat raya dibawa kekuasaanya. Sang Penguasa yang ditunjuk Tuhan untuk memimpin jalan para Dewa dan Seluruh makhluk kepada kebenaran yang sejati. Kuasa yang memerintah Jagat raya dengan berbagai mancam makhluk. Dia memiliki seorang Puteri yang sangat sakti mandraguna juga cantik tidak bandingan di seluruh jagat. Dia Sang Maharaja Semesta pertama mengelilingi Semesta untuk menyatukan seluruh Alam dibawah kepemimpinanya. Dia menggunakan armada perang untuk menjelajah dari satu planet ke planet yang lain. 12 Dewa yang tidak mau tunduk kepada Adipati raksa mereka mulai menghimpun kekuatan dan berperang melawan Adipati raksa. Begitu juga para Pemimpin dari setiap Planet yang ditaklukan mulai memberontak. Menceritakan perjalanan Wijaya kusumah setelah mendapatkan gelar Sang Hyang baru kelana yang menguasai takdir dua Dunia. Dunia manusia dan Dunia binatang Ilahi. Bersama 12 Makhluk lainnya. Mereka dipuja seperti Dewa setelah berperangelawan Adipati raksa yang menjadi penguasa tirani setelah berkuasa sangat lama di Lima Alam semesta. Shinta Shiro yuma sang Dewi ular perempuan paling cantik di seluruh Alam semesta yang membuat tiga Dewa berperang untuk memperebutkannya. Mereka adalah Kenji Akirayama Sang penguasa surgawi tak tertandingi, Aji saka Dewa Naga pertama di galaxi bimasakti, dan Shinjiro kenji kira Sang Dewa kematian. Shinta memilih Raja Iblis Sebagai pendamping hidup menjadikan dia musuh empat ras manusia, Naga, Dewa dan Iblis itu sendiri. Kisah Sang Malapetaka yang terbebas dari segel dua Kaisar Naga Illahi dari ujung tergelap Alam semesta. Dia datang untuk menghancurkan Kerajaan Naga Ilahi tetapi Kerajaan telah hancur. Yang Saat ini berdiri adalah Kerajaan Lubang Dunia orion. Yang berdiiri di puncak kekuasaan. Kerajaan terbesar diAlam semesta akhirnya hancur akibat perang yang diprakarsai 12 makhluk yang menjadi 12 Dewa tertinggi. Kedua belas makhluk tersebut adalah Shinta shiro yuma Sang Dewi ular, Sang prawersari ratna dyah intan. Wijaya kusumah Dewa garuda sakti, Sang Hyang baru kelana, Kenji akirayama penguasa surgawi, Sang hyang nur cahya nirwana. Kenji kira Dewa kiamat, Sang Hyang Kala. Aji saka Dewa Naga, Sang Hyang Naga niskala. Kotaro sun Dewa matahari Sang Hyang Cahya niskala. Sun Fuji yuma Dewa angin Sang Hyang bayu kelana, Kaguya yuki murayama Dewi bumi Prameswari Dyah Purwa pratiwi. Yuki fujita Dewi kematian Praweswari Dyah Kala, Kenji thian Akirayama Dewa langit Sang Hyang Nur Niskala, dan Fujita yuki Dewi langit Praweswari Dyah ratna wulansari Perang Besar pertama yang tercatat di Alam semesta terjadi.

Time and time again, the gods have used men to champion their agendas facing off schemes from those who embrace the dark. Maxwell Reiga aka Kane is a young man in his prime but unfortunately he dies only having lived a mediocre life. The goddess Shiroi offers to give him a second chance at life in another world. Of course, with an agenda that will gradually unfold while testing the limits of his new self. He is reborn into a new world of slavery, magic and adventure. What will become of him?

In a world where morality is a stat and every action is judged by the all-seeing System, Ren Kisaragi awakens to a twisted game mechanic— “Villain Login Complete. Every act of hatred grants you power.” Branded as a villain overnight for a crime he didn't commit, Ren is hunted by heroes, shunned by friends, and cursed by the world. But for every glare, every betrayal, every blade aimed at his heart… He levels up. Now, surrounded by enemies and under constant surveillance, Ren must play the role they’ve forced on him—not to destroy the world, but to rewrite it. Because while heroes chase fame, the villain rewrites the rules. But how long can he survive, when becoming stronger means becoming more hated—and when the line between the mask and the man starts to blur?

Di tanah magis bernama Draventh, sihir dan pedang menjadi penentu takdir. Namun bagi Malira dan putranya, Araya, yang terlahir dari cinta dan dikhianati oleh janji, takdir terasa seperti pisau yang perlahan menusuk. Ditinggal oleh semua yang dicintai Araya hidup di dunia yang tak pernah ramah. Hujan, luka, dan kelaparan adalah sahabat mereka Ketika bayang-bayang kejahatan merayap masuk melalui wajah tersenyum seorang manusia busuk, dan dunia mulai mencabik satu-satunya yang Araya miliki, kebencian pun tumbuh.

What would you do if you got a second chance at life... but only in your dreams? Yuuma Kisaragi is invisible. At nineteen, he's already a college dropout, a disappointment to his mother, and a ghost in his own life. No friends, no future, no hope—just endless days of watching other people live the life he'll never have. Until he dreams. In that dream, he wakes up in a parallel Japan where everything feels familiar yet impossible. Cherry blossoms bloom out of season, the sky holds mysteries he can't explain, and most importantly—**people can see him.** A mysterious silver bracelet appears on his wrist, pulsing with an energy he doesn't understand. It seems to respond to his emotions, but what does it want? And why does it feel like it's... counting something? --- Enter Airi Minazuki—the girl everyone loves to hate. She's stunning, brilliant, and completely unpredictable. One moment she's laughing like sunshine, the next she's cold as winter rain. Her classmates call her fake, unstable, attention-seeking. But Yuuma sees something else in her eyes—a longing he recognizes all too well. Their connection is instant. Electric. Impossible to ignore. For the first time in his life, Yuuma matters to someone. He makes friends who feel like family. He discovers laughter, purpose, and something he never dared hope for. But in a world born from dreams, nothing is ever as simple as it seems. --- As Yuuma builds the life he's always wanted, questions begin to haunt him: Why does this world feel so real when he knows it's not? What happens when the bracelet stops glowing? And why does Airi sometimes look at him like she's seeing a ghost? Some dreams are too beautiful to be just fantasy. Some connections are too deep to be coincidence. And some love stories... transcend reality itself. --- This isn't just another isekai romance. This is about second chances that come with hidden costs. About love that defies explanation. About discovering who you really are in a world that might not exist—and fighting to keep that person when everything falls apart. It's about the magic of human connection, the power of hope, and the question that will haunt you long after you finish reading: If you could live your perfect life in a dream, would you ever want to wake up? --- Join Yuuma as he discovers that the line between dreams and reality isn't as clear as he thought—and that some chances only come once, even if they come twice. A story that will make you question everything you know about love, dreams, and the courage it takes to truly live. When reality gives you nothing, dreams give you everything. But what price are you willing to pay to keep them? [Also Coming soon on Royal Road! https://www.royalroad.com/profile/752633]

Luego de terminar el secundario Touma Kisaragi lo tenía todo planeado: una vida tranquila, cero estrés y videojuegos sin fin. Pero Hina, su amiga de la infancia tenía otros planes. Arrastrado a la Academia Seisen -una prestigiosa institución de la empresa NovaTech y el gobierno de Japón, ubicada en una isla artificial de Okinawa. Donde los estudiantes despiertan fragmentos cósmicos llamados «Astra Core»- Touma se encuentra rodeado de personajes con poderes únicos, divisiones de combate de élite y artilugios de alta tecnología. Ahora, atrapado entre una senpai británica de pelo plateado y otras compañeras de Seisen. Touma tratara de sobrevivir al ataque de unos entes dimensionales llamados Nulvoid y a su vida diaria en el instituto. Sin poderes y unos lentes con Ellie, su compañera IA, deberá enfrentarse a lo desconocido, las interacciones sociales... Bienvenido a Seisen ¿Que podría salir mal?

Sora and Shiro, human siblings from a modern world, are cursed by a higher being for defying divine law. Stripped of the ability to use magic, they are exiled to a high-fantasy world governed by arcane energy and martial might. Their survival becomes a struggle as they face institutional prejudice, magical aristocracy, and societal marginalization.

In a world rules by humans, civilisations have emerged and crumbled giving rise to new inventions and technology. things that people of the past could only dream of. But with such advancements came a change in the way the world worked. while on the surface not much has changed while in the criminal underworld they are making use of a new species. a breed of human originaly created to be used in wars have now been bred and used as pawns and puppets of some of the richest and most influential people. This story follows the life of Shiro he is one such human who was subjected to genetic mutation and experiments. however he is unlike the rest of his kind he is not controlled by the rich and powerful instead they fear him. Join him in discovering the limits of his powers as he builds his own team of unique individuals. ____________________-------------------____________________ Join the discord https://discord.gg/uXYAWgU5TQ if anyone is available to help with cover art please Contact me via the discord so we can discuss.

Shiro isn’t here to save the world. He’s here for coin, rum, and maybe revenge. After a one-night stand leaves him robbed blind, he sets off on a mission. Not just for his money, but for something deeper: a chance to flip the middle finger to the world that spat him out. But when strength meets circumstance, and rules start to bend, Shiro is dragged into a game he didn’t ask to play… and he’s about to play it on his own damn terms.

The world is destoryed by creature that call "Chimeras". Humanity fights back with weapons known as "Arment" wielded by those called "Armentor" Amid the chaos, a girl named Shiro. who has lost her memories and whose body is partially turned into a Chimera. searches for her true identity as the corruption spreads within her. This is her story of self-discovery in a ruined world. ※This novel may contain torture, detailed internal organ damage, and gore content. 　Please read with understanding.

Gaia City stands as the pinnacle of human advancement—a sprawling, walled metropolis where science has given birth to the extraordinary. Within its boundaries live Gaias, individuals born with Arthem circuits, synthetic pathways infused with Psi Waves and the mysterious energy known as Metra. Ranked from Eta to Alpha, Gaias are classified, studied, and controlled under a rigid system designed to maintain order and suppress the unknown. But science can only explain so much. Beyond the city's borders dwell the Mergus, wielders of pure Metra through forbidden Ancient Scripts and sacred texts long dismissed as myth by Gaia City's researchers. Unlike Gaias, Mergus tap into forces unquantifiable, echoing lost wisdom and primal power. Contact between the two worlds is outlawed—for good reason. Exposure to raw Metra could cripple or kill a Gaia, disrupting their Arthem at the core. Ryouma Winslow, an Eta-class Gaia dismissed as a nobody, had no intention of getting involved with either side. But everything changes when he crosses paths with Archive (Shiro), a strange girl with fractured memories and a presence that doesn’t belong in Gaia City. Helping her seemed simple—until restoring her mind reveals a truth that shatters the world he thought he knew. Now entangled with rogue Mergus factions, hunted by unseen forces, and navigating fragile alliances with powerful Level Alpha Gaias like the electrifying Mei Tokisaki, Ryouma finds himself drawn into a multilayered conflict that transcends science, challenges belief, and threatens the foundations of Gaia City itself. Because in a world split between science and sorcery, the greatest danger is a boy who doesn’t fit into either side. Author's Note to Readers: This story draws clear inspiration from the Toaru series (A Certain Magical Index / Scientific Railgun), and longtime fans will notice structural and tonal similarities in its arcs, setting, and faction dynamics. While some adaptations and elements may feel familiar, please know that the world, characters, power systems, and underlying themes in A Certain Undefined Gaia are entirely original and unique to this work. Think of it in the same way that fans appreciate both Mushoku Tensei and TBATE—similarities exist, but each story carries its own voice, meaning, and direction.