Assorted Monsterfucking
Stories with monsterfucking, including but not limited to: kaiju, merfolk, yokai, aliens, angels, demons, plants, robots, hybrids, furries, etc...
Anything with that monsterfuckery feeling. Any fandom, any rating.
May feature sensitive topics like body horror and dubious/non-consent, please check tags before reading for your own safety.
(Open, Moderated)
Recent works
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Kafmina Kinktober Art 2025 by Maypl_Syrup
Fandoms: 怪獣８号 | Kaiju No. 8 (Manga), 怪獣８号 | Kaiju No. 8 (Anime)
08 Mar 2026
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Summary
Kinktober Artwork for Mina x Kafka
Day 1: Biting/Scratching
Day 2: Overstimulation
Day 3: Size
Day 4: Gagged/Restrained
Day 5: Blindfold
Day 6: Foodplay
Day 7: Uniform
Day 8: Monster -
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Summary
Sukuna huffed, “My eyes are up here, brat.”
At last, shaded amber eyes found his own with laser focus, just a moment before he seemingly processed the words. His cheeks flushed darker in mortified shame, quickly followed by a hasty snarl that bared his pitiful blunt teeth.
“I don’t know what you mean, you bastard.” he spat out, tone uneven. He held Sukuna’s unimpressed, barely amused gaze for a few more seconds before angry humiliation appeared to overwhelm him, breaking eye contact as he looked off to the side with gritted teeth.
Well.
They’d never said the brat had to take him in a fight.
Yuuji and Sukuna negotiate the terms of Yuuji’s revival. The wording of the challenge is just a little different, and Sukuna’s original form comes out to play. Those… those are some very big arms. And thighs. And pecs… what were they doing again?
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Monster Inside by dethna
Fandoms: 光が死んだ夏 | Hikaru ga Shinda Natsu | The Summer Hikaru Died (Manga), 光が死んだ夏 | Hikaru ga Shinda Natsu | The Summer Hikaru Died (Anime)
22 Jan 2026
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Summary
“I think we both want this, so there’s no reason to think about it this hard.”
Yoshiki’s hand is grabbed, and pulled toward the dick. His heart is beating so hard he thinks it might explode out of his chest, but he can’t break the hold—whether it’s Hikaru’s inhuman strength or his own weakness, he can’t say.
His fingers twitch when they make contact with the warm, soft dick. A line is crossed past a point of no return. -
Give Me All Your Hopeless Hearts And Make Me Ill by ConnieSpringersGirlfriend
Fandoms: 光が死んだ夏 | Hikaru ga Shinda Natsu | The Summer Hikaru Died (Manga), 光が死んだ夏 | Hikaru ga Shinda Natsu | The Summer Hikaru Died (Anime)
10 Jan 2026
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Summary
Open.
Hikaru's body was… open.
The thought didn't make sense at first. His mind slid right off it, refused to look. Then it hit him all at once and the scream tore out of his throat.
Hikaru's body was open. Why was his body open? A deep, gaping slit carved into his chest—bloodless and vast, like a wound carved by a cruel, unfeeling hand. It pulsed, growing wider as the thing inside surged forth, tendrils writhing in a grotesque dance of hunger.
"What—what the hell—"
Yoshiki cried out as the tendrils speared through him, sharp and serpentine, slithering between his ribs. His heartbeat stuttered as something latched on—not piercing, but claiming space, threading itself through muscle and bone, burrowing deeper until it found his heart and squeezed.
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Or; Yoshiki is not having a good time. #FreeYoshiki
Series
- Part 2 of TSHD
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Parade of Two by Loveotomy for Arvion
Fandoms: 光が死んだ夏 | Hikaru ga Shinda Natsu | The Summer Hikaru Died (Manga), 光が死んだ夏 | Hikaru ga Shinda Natsu | The Summer Hikaru Died (Anime)
01 Jan 2026
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Summary
Poor judgement, teenage impulses, acts and sensations that no other human yet had a name for- Yoshiki wanted to build a monument to every single jagged piece living inside of his mind. One that he might pray to everyday, for forgiveness, for the selfish, greedy want of more.
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Yoshiki begins to sense a change. Every teenage boy goes through this..... right?
Recent bookmarks
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Agnoiology by Buffintruder
Fandoms: 光が死んだ夏 | Hikaru ga Shinda Natsu | The Summer Hikaru Died (Manga), 光が死んだ夏 | Hikaru ga Shinda Natsu | The Summer Hikaru Died (Anime)
07 Dec 2025
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Summary
"Do you want to try feeling inside me again?" Hikaru asks, eyes bright.
"Would I learn anything new, doing it again?" Yoshiki asks a little skeptically. He has tried it twice already, and if anything, he understands Hikaru less.
"Probably not," Hikaru says, but he hasn't moved, and his eyes remain fixed on Yoshiki.
Yoshiki knows that it would be colossally stupid. He's messing with things he doesn't understand, and he doesn't really need Kurebayashi's warnings to know it's dangerous for himself and those around him. He worries that with each brush against whatever lies beneath Hikaru's skin, he loses more of his humanity, that someday he'll be corrupted beyond recognition.
And yet, a part of him wants.
…
In which Yoshiki takes a break from research to try touching Hikaru again.
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Pheromonal Flare by Naruse_Ren
Fandoms: 怪獣８号 | Kaiju No. 8 (Manga), 怪獣８号 | Kaiju No. 8 (Anime)
08 Oct 2025
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Summary
Beneath the waves, biology has its own rules, and loyalty comes in currents you can’t resist.
Day 08: Breeding
Series
- Part 6 of Nrhskinktober2k25
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I Have Connected the Dots (He Hasn't Connected Shit) by Pageofpens
Fandoms: 怪獣８号 | Kaiju No. 8 (Manga), 怪獣８号 | Kaiju No. 8 (Anime)
15 Aug 2025
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Summary
Hoshina has been training tirelessly for a rematch against Kaiju No. 8 since their first encounter. His dreams, however, have taken an unexpected twist; blending his desire for the new recruit, Kafka Hibino, with his frustration over letting No. 8 escape.
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NaruHoshi10 by KasumitanArt
Fandom 怪獣８号 | Kaiju No. 8 (Anime), 怪獣８号 | Kaiju No. 8 (Manga)
21 Nov 2025
- Words:
- 23,024
- Works:
- 4
- Bookmarks:
- 15
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Breathe in My Desire by KasumitanArt
Fandoms: 怪獣８号 | Kaiju No. 8 (Manga), 怪獣８号 | Kaiju No. 8 (Anime)
26 Mar 2025
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Summary
Narumi clenched his grip into Hoshina’s loose pants. “Hah... Is this what you’ve been fantasizing about Vice-Captain?” Narumi moved slowly, tugging the fabric past Hoshina’s thighs with a smirk and adding, “Getting fucked by the best JAKDF combatant?”
“Ya…” Hoshina admitted, easily.
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Or 10 blurts Hoshina’s dirty thoughts about Narumi while they’re sparring and even though one thing leads to another… of course, it isn’t that simple.
Series
- Part 1 of NaruHoshi10