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Unshackle by MysticManuscript
Fandoms: 怪獣８号 | Kaiju No. 8 (Anime), 怪獣８号 | Kaiju No. 8 (Manga)
07 Sep 2025
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You were Ashiro Mina before Ashiro Mina. The strongest, the best of the best, the one who leads the Third Division that rivaled the First.
And now, youre no more than just a voice in an earpiece, guiding the battle you no longer can fight. And you must decide; fade into the darkness or break free.
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wound me, oh dearest. by arrow_head
Fandoms: 怪獣８号 | Kaiju No. 8 (Manga), 怪獣８号 | Kaiju No. 8 (Anime)
07 Sep 2025
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Trapped in a marriage with a man who does not reciprocate your affection, you try to find meaning in your life despite your upbringing.
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Messages Across The Void by AliasEinzwerthos (AzemTheEverRecording), Narvgana_The_Void_Phoenix
Fandoms: 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia (Anime & Manga), Toriko (Anime & Manga), Parahumans Series - Wildbow, 怪獣８号 | Kaiju No. 8 (Manga), 怪獣８号 | Kaiju No. 8 (Anime), Harry Potter - J. K. Rowling, Persona 5, Persona 5 royal strikers
07 Sep 2025
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In the space between realities, a spark of divine curiosity connects six souls on the edge of change.
When Narvgana, the Void Phoenix, lifts the barriers between universes, six unsuspecting people from wildly different worlds find themselves in the same mysterious chatroom. Heroes, chefs, soldiers, students, and survivors — all connected by messages carried across the emptiness between stars.
With only their words to bridge infinite distance, they begin to share their lives, secrets, and worlds… and unknowingly, change each other forever.
A crossover chatfic blending My Hero Academia, Kaiju No. 8, Worm, Toriko, Persona 5, and Harry Potter — guided by a curious outer god.
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Im not a monster! by Onyx_lux
Fandoms: 怪獣８号 | Kaiju No. 8 (Anime), 怪獣８号 | Kaiju No. 8 (Manga)
07 Sep 2025
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Hoshina knew Kafka's biggest dreams were to join the defence force, since the day he met the omega he knew, so, as any good mate would. he helped him trained him to the omega would get in, come to find out after he got in the omega was pregnant this was harder to hide on top of the fact that the dude could transform into a kaju but of course his mate managed to mess it up he just had to save everyone and now the defense force knew that he was a kaiju. Hoshina just hoped that Kafka's natural pudge would hide the pregnancy for long enough but he doubted it considering the omega was 9 months along while he didn't look pregnant he was ready to pop.
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TLDR: Pregnant Kafka is being held by the defense force due to him revealing his secret. -
Todo por ser competitivo by mayieeeee
Fandoms: 怪獣８号 | Kaiju No. 8 (Manga), 怪獣８号 | Kaiju No. 8 (Anime)
06 Sep 2025
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Gen siempre se hacia destacar por su temperamento y su forma de ser. Estaba acostumbrado a sobresalir ya sea por sus buenas notas, sus logros, competencias o su pésimo caracter. Tanto para mal como para bien, destacaba. Pero se enorgullecía en todo, excepto en algo, era fatal en sus relaciones interpersonales. Apenas duras se llevaba bien con dos personas y no espera que eso vaya a cambiar en la universidad, hasta que conoce a Soshiro Hoshina, al cual proclamo como su rival.
O Narumi Gen siempre fue un alfa problematico y nerd, pero Hoshina Soshiro vino a revolucionar su mundo en más de un sentido.
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must i be burn to be seen by bacalqis
Fandoms: 怪獣８号 | Kaiju No. 8 (Manga), 怪獣８号 | Kaiju No. 8 (Anime)
06 Sep 2025
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You knew better, had braced yourself for the hollow spaces his duty would carve into your life. Loving the captain of Japan’s First Division of JAKDF meant birthdays spent in silence, anniversaries marked by absence, and a thousand secrets locked behind his eyes. Still, you waited, loving him until the weight of his absence splintered you and when you finally broke, he was nowhere to catch the pieces.
Series
- Part 1 of all for what
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Filling in the gaps by Maros753
Fandoms: 怪獣８号 | Kaiju No. 8 (Manga), 怪獣８号 | Kaiju No. 8 (Anime)
06 Sep 2025
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The battle has ended the JAKDF won but with a great cost the city is destroyed a great number of people died both soldiers and civilian folk and Kafka… Kafka is fading
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Subject 009 by Actaraius
Fandoms: 怪獣８号 | Kaiju No. 8 (Manga), 怪獣８号 | Kaiju No. 8 (Anime)
06 Sep 2025
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Reika Ichikawa was supposed to die the night the kaiju leveled her city.
Instead, she woke up rebuilt—fused with kaiju muscle, wired for war, and renamed Subject-009.Now the Defense Force’s first experimental soldier, Reika fights not just to kill monsters, but to prove she isn’t one. With claws, tails, and instincts she barely controls, she walks the line between weapon and woman, predator and protector.
Stationed in the 3rd Division under the watch of sharp-eyed Captain Mina and Vice-Captain Hoshina, Reika must earn her place among soldiers who see her as a ticking bomb. To the brass, she’s a tool. To her brother Reno, she’s a living reminder of everything he couldn’t save. To Hoshina, she’s something else entirely—beautiful, dangerous, and wild as the kaiju she was built to destroy.
But the deeper Reika pushes her transformation, the more she risks losing herself. And in the looming shadow of Kaiju No. 8, she’ll learn:
Not all monsters wear claws. Some wear uniforms. -
Come Home Safe by PotatoSlayer
Fandoms: 怪獣８号 | Kaiju No. 8 (Manga), 怪獣８号 | Kaiju No. 8 (Anime)
06 Sep 2025
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For Most people, Kaiju are their greatest fear. But for others, there's a fear that far surpasses that. A fear of daily life. Estella Nakao was an underdog just when it comes to surviving, barely stumbling through life.
Until hope shows up in a very unexpected way.
But who knows what a little hope will actually cost.
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Since this fic is so long, I do not want anyone to be caught off guard on the direction this story goes so here's a spoiler-free high level story expectation:Arc 1&2 (Chapter 1-22) : Teeth-rotting sweet loving fluffy fluff.
Arc 3&4 (Chapter 23-TBD): Dark elements start being introduced with a heavy focus on psychological trauma
Arc 5&6 : Extremely heavy elements; gore, death, explicit content, ect.
Arc 7+ : TBD...
**Overall, a lot of OCs introduced and lots of subplots going into the world building that was only ever hinted at in source material**
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When Division 3 falls, Mazikeen is reassigned to the infamous Division 1, home of the strongest captain in the Defense Force. She expects order, precision, and hardcore training. What she finds instead is Gen Narumi, whose loud, reckless, impossibly strong… and maybe a little too good at getting under her skin.
Between kaiju battles and video game duels, attraction sparks. She was ready for monsters and war. She wasn’t ready for him.
This fic will be a bit different from some others I’ve written. Focusing more on the happiness of my OC vs the usual trauma. However, that may change as the fic goes on 😉
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“So, you don’t remember asking Vice Captain Hoshina out on a date?”
Gen's brain comes to a record-scratch halt.
He stops breathing.
“What?” He once again repeats, but this time, his voice cracks.
Kikoru laughs. She laughs loudly.
Or: Narumi Gen, battle-high and on the verge of passing out, blurts out a confession. Maybe the outcome is something he can learn to live with.
Series
- Part 1 of be my home
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Mama Shark by Breathofthewind29
Fandoms: 怪獣８号 | Kaiju No. 8 (Anime), 怪獣８号 | Kaiju No. 8 (Manga)
04 Sep 2025
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One life starts, and trials begin.
Mina must confront the reality of carrying the child of Kaiju no.8, risking her status and the life she has known for almost two decades. -
kiss my fucking bullet ( and i’d rather kiss your lips ) by Mynluv
Fandoms: 怪獣８号 | Kaiju No. 8 (Manga), 怪獣８号 | Kaiju No. 8 (Anime)
03 Sep 2025
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Summary
nothing much, just Narumi and Hoshina trying to learn about each other until their relationship becomes complicated and the entire force has to come to their aid (except for Soushiro's brother)
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You Wore My Wounds by quinowskie
Fandoms: 怪獣８号 | Kaiju No. 8 (Manga), 怪獣８号 | Kaiju No. 8 (Anime)
03 Sep 2025
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But there was something that felt… off. Reno was more aggressive with his attacks. Motivated? Kikoru was beginning to falter. The grip on her axe was looser, almost tentative.
Then Kafka saw it. The look in his eye. Kafka had seen it in his own. Dangerous and alarming. Reno became unusually quick, but more reckless.
The monster was taking over.
The weight of Odawara never left.
Numbers Weapons 4 and 6 were built to clash—their legacies burned onto the next generation to bear.Kikoru and Reno are friends; they got along fine for the most part. But ghosts don’t stay buried forever. Especially not with both of them involved.
Series
- Part 6 of Frost and Flame
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raising katsurou by hoshinarumi
Fandoms: 怪獣８号 | Kaiju No. 8 (Manga), 怪獣８号 | Kaiju No. 8 (Anime)
02 Sep 2025
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Alpha Narumi Gen and Omega Hoshina Soushirou navigate their relationship, family, and parenthood as they raise their three-year-old child, Narumi Katsurou—all while the Kaiju No. 8 and Kaiju No. 9 chaos unfolds.
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Hearts Like Fault Lines by Tacchan0506
Fandoms: 怪獣８号 | Kaiju No. 8 (Manga), 怪獣８号 | Kaiju No. 8 (Anime)
01 Sep 2025
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Narumi Gen once let go of the girl he loved to chase strength, hiding the truth that a kaiju had already taken everything from him. Now, years later, fate brings Nagase Aki back into his life—only this time, she’s engaged to his rival, Vice Commander of Third Division, Hoshina Soshiro.
In Third Division, the quiet and steadfast Shimizu Nao has spent years training under Hoshina, her feelings for him growing in silence. But as tensions spark between Aki, Narumi, and Hoshina, Nao must face a choice—speak her heart or watch from the sidelines.
With kaiju threats forcing the two divisions into uneasy alliance, duty and desire collide. Love may survive the battlefield, but not without casualties of its own. -
Put Your Hands On The Table by Rellionna
Fandoms: 怪獣８号 | Kaiju No. 8 (Manga), 怪獣８号 | Kaiju No. 8 (Anime)
31 Aug 2025
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"Fuck Capitalism!" Tachibana shouts as he flips the bank.
"Hey!" Setsuna screams back. "My money!"
They put Tachibana behind the bars.What supposed to be a training session ends up being a series of silly games. Kikoru, who just got transfered to the 1st Division after Number 10 destroyed Tachikawa Base, has no choices but to indulge her seniors.
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Unwanted, but... by kaedeharax
Fandoms: 怪獣８号 | Kaiju No. 8 (Manga), 怪獣８号 | Kaiju No. 8 (Anime)
30 Aug 2025
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Apa yang akan kamu lakukan ketika terbangun dari tidur, dan langsung dihadapkan oleh wajah seseorang yang memberikan maklumat kebencian padamu?
Jangan tanya Hoshina. Karena situasinya... agak buruk?
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HoshiKaf Halloween Prompt Week Challenge by Kaiserphobia
Fandoms: 怪獣８号 | Kaiju No. 8 (Manga), 怪獣８号 | Kaiju No. 8 (Anime)
29 Aug 2025
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Halloween Prompts:
October 25-31
Day 1: ---
Day 2: ---
Day 3: ---
Day 4: ---
Day 5: ---
Day 6: ---
Day 7: ---Check out the prompts inside 💜
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Choque de Divisiones by aaicchan
Fandoms: 怪獣８号 | Kaiju No. 8 (Manga), 怪獣８号 | Kaiju No. 8 (Anime)
28 Aug 2025
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Narumi y Hoshina, eternos rivales en las Fuerzas de Defensa, verán su tensa relación transformarse radicalmente por una inesperada noticia del Director General Shinomiya.