Species Transformation Stories

Read stories about the wild adventure of crossing species boundaries to explore entirely new forms of existence! Whether transforming into mythical creatures, animals, aliens, or fantasy beings, species transformation opens up incredible new worlds of experience.

More in Transformation

💅 Bimbo 🧠 body swap 💪 body transformation 🍈 Breast Growth 🚻 gender change 🦎 shapeshifting

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Stories (234)

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Vesper's Soul Harvest

By bigjoebob

RedQuill

Vesper's Soul Harvest

A late night office worker finds himself as the prey for a shapeshifting demon who wants not just his soul but the souls of his whole family

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Delivery Boy's Rutting Ritual

By kittylove

RedQuill

Delivery Boy's Rutting Ritual

A city courier’s accidental exposure to minotaur pheromones transforms him into a needy Sissyfur, forcing him to beg the ranch's beast for a primal, mounti

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I can’t stop turning into a Demon Enchantress

Meanwhile, on the other side of Iron Creek City… Inside the quiet, sterile walls of the Gene Association’s private lab, the low hum of machinery filled the room. Alex was still resting inside the sleek medical pod, completely unaware of the dark net closing in on him outside those walls. Knowing that Alex wasn’t in any immediate physical danger, Mira had returned to her own work at her desk, occasionally rubbing her temples as she tried to figure out how to handle Lily’s wild, pheromone-induce...

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Marooned Men Inseminate Island

Eight stranded sailors discover an unnaturally abundant, predator-free island and its abandoned village, forcing them into isolated survival.

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The Little Mermaid Prince

By amia

RedQuill

The Little Mermaid Prince

Koralli was originally a normal mermaid but after finding a magic necklace he was able to become a human

Costume Becomes Her

College student Grace wears a magical costume, becoming the succubus

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Frat Gangbang Transforms Freshman Fox

By kittylove

RedQuill

Frat Gangbang Transforms Freshman Fox

A shy freshman follows a glitter-tailed vixen into a Halloween maze; a sip of her cocktail transforms him into the frat pack's coveted, tail-lifted queen.

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Hero Seduced by Grateful Succubus

The young hero, Steve, has slain the demon king, retiring back to his home village, and is greeted by a surprise guest: Layla, the first monster he met, a weak succubus. She'd imprinted on him, and cooperated with the village to celebrate his return. The festivities begin, and as one thing leads to another, they end up spending the night together. Unbeknownst to her, she couldn't control her nature, and began draining almost all of Steve's powers, feeling absolute bliss.

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One Hundred Shot Glasses of Body Changes

Three estranged friends reunite at a mad scientist's mansion, where a grid of 100 mystery shots promises body-altering chaos and a night to remember.

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Nymph Garden Grows and Transforms adventurers

A shy half-orc druid's obsession with a forbidden flower transforms his body and rewrites his very nature turning a druid grove into a nymphs lair.

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My Jealous Petgirl Reclaims Me

By robloxnerd123

RedQuill

My Jealous Petgirl Reclaims Me

A shy master's secret pet arrives at his college, disguised and dangerously jealous after he's kissed three other girls.

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The Alien Grove

When tentacle trees sprout at her university, a curious senior student consensually volunteers, eager for her first insemination.

Dragons Destiny

A ranger hunts golden dragon eggs but discovers they emit an arousing heat that overwhelms him, forcing a burning egg inside as the dragon finds him.

Bred by My Alien Boyfriend

By pluto888

RedQuill

Bred by My Alien Boyfriend

Alien Will abducts trans Nico, using tentacles, aphrodisiac venom, and mind control to breed him into a drooling, begging vessel for his eggs.

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Elf Uses Potion on Human Partner

A reckless elven adventurer gambles on a love potion for her human business partner, unleashing a night of intense, uncontrollable side effects.

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Sister Seduced by Jungle Goddess

A researcher in a lost jungle temple touches a snake goddess statue, awakening Nagawathi and beginning her own sensual, scaly transformation.

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Shield and Spear Heroes Transformed Into Fox Girls

By cvlsoldier

RedQuill

Shield and Spear Heroes Transformed Into Fox Girls

Rival heroes Naofumi and Motoyasu get teleported, stripped, and transformed into busty fox-eared women.

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Dr. Doyle Corruption (Side Story From The Lagend of Tarzen)

By rockye001

RedQuill

Dr. Doyle Corruption (Side Story From The Lagend of Tarzen)

In the heart of the jungle, Dr. Doyle, a renowned anthropologist, becomes the unwilling host to Queen La, an ancient spirit seeking to revive the lost city of Opar. Dr. Doyle's body transforms, becoming more powerful and sensual as Queen La takes control, driven by her hunger for power and dominance. The new Queen Doyla, now in command of Dr. Doyle's body, seduces Tarzan, unaware of the spirit's possession, and uses her newfound power to claim the jungle as her own.

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Club Veil: Alien Sex Pet Recruitment

Club Veil offers a unique opportunity to interact with the erotic sex pets, of the Pegrason Empire and even become one of them.

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The Chameleon

A centuries-old shapeshifter must seduce women, using their deepest desires to fuel his immortal hunger.

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Dracos First Embrace

A man's world is turned upside down when his lover transforms into a dragon, revealing a hidden, primal side that awakens a deep, passionate connection between them. Their journey involves a blend of tenderness and raw, unbridled lust, as they explore the depths of their newfound desires. The tale delves into themes of transformation, trust, and the intense, overwhelming pleasure that comes from surrendering to one's deepest fantasies.

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Scavengers transformed into Alien Cat Girls

A scavenger infected by alien nano-goo transforms into a cat-eared woman with uncontrollable heat, racing to find help.

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Lamia rescues family, claims father

A father and his two children are stranded in a jungle after a tree crushes his leg, until a naked lamia guardian appears to save him.

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Town Betrayer Breeds Me

By brstad

RedQuill

Town Betrayer Breeds Me

An innocent youth is taken by a ruthless outlaw, his forced captivity awakening a dangerous mutual desire.

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Doctors Fucked Into Fox Bitch

By kittylove

RedQuill

Doctors Fucked Into Fox Bitch

A backpacking orthodontist wakes up as a foxy vixen, betrayed by his hung guides who force him to serve their tribe’s wild rituals.

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Agent Carter's Secret: the Captain America

In 1943, Agent Carter, secretly a succubus, transforms frail Steve into a demoness and claims her as her mate.

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When Magic Returned

When a dimension shift births magic, a soup-making minotaur claims a human volunteer as his egg bearer for a month of brutal lust and radical transformation.

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Hitomi Loves Hitoshi

A retired adult star finds her quiet life in Kumamoto transformed when her femboy incubus lover fills their home with tender worship and adoring intimacy.

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Until Forever Ends

By blackdagger655

RedQuill

Until Forever Ends

1943: A lonely war wife rescues a kitten from a storm. That night, she wakes to find the creature has become a rugged stranger in her bed.

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Clone Wars Fuck Injection

A Twi'lek farmer's encounter with a rogue droid leads to a bizarre injection that merges her body with Padmé Amidala's.

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Lawyer curses rival into her bitch

By kittylove

RedQuill

Lawyer curses rival into her bitch

A cursed lawyer grows a monstrous cock while her boyfriend transforms into a sissy, their forbidden urges spiraling into brutal, humiliating sex that resha

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Conservation goes on the offensive

Zach job has just changed. After years of trying to stop poachers killing endengered animals, his organisation has decided to go on the offensive. They will capture those poachers, and with a serum transform them into a submissive, anthro female of an endengered animal. Then zach job is to fuck them, breed them, so they give birth to a new generation of that animal

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The Lake's Forbidden Embrace

A young woman transformed into a hybrid creature with a human body, beautiful face, and crocodile-like scales and tail, lives in a cave under a lake. After months, a man named Verdy falls into the lake and is rescued by the creature, who turns out to be his ex-lover, Vina. The two engage in passionate, bestial sex, during which Verdy undergoes a similar transformation. The story explores themes of forbidden love, transformation, and primal passion, with explicit depictions of rough, animalistic ...

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The Violet Rock's Forbidden Awakening

A young woman's life takes a dark turn when she finds a glowing purple meteorite that begins to corrupt her body, mind, and soul, transforming her into a seductive force that preys on her roommate. She fights the changes at first, but as the days go on, she slowly gives into the changes and evil thoughts coursing through her to corrupt other young unsuspecting straight girls. The meteorite elongates into a cock that she can control, and she uses it to corrupt her roommate, filling her with the...

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Lustful Guardian

Sandra, a curious librarian, accidentally triggers a magical ritual from an ancient tome, transforming herself into a powerful, anthropomorphic, Cerberus. With three distinct heads and a fur-covered, curvaceous body, each with its own personality vying for control, Sandra Grapples with her new existence while wrestling with an insatiable sexual hunger. As Sandra struggles to reverse the spell, her new form stirs a primal lust that leads her to explore the full intensity of her sensual pleas...

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Practical Bovine Research

A perfect agriculture student secretly craves hucow submission as jealous rivals lace her water with fertility vitamins, triggering lactation in class.

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Girlfriend rides chained werewolf boyfriend

She finds her tall musician boyfriend chained to a radiator, naked and terrified he’ll become a werewolf—then they have sex as the monster inside him stirs

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Dekusite and Vampire

By clankcaster

RedQuill

Dekusite and Vampire

A quirkless hero’s desperate rescue awakens a symbiote needing a vampiric girl’s essence, forging a heated bond that leads to their ultimate transformation

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So I Married a Mantis

After a passionate wedding night, a groom's ecstasy turns to terror as his new bride reveals her true, consuming nature.

Accident Frees Dracula, Seducing Huntress & Bystander

A vampire hunter's captive turns the tables, using a bystander to corrupt his enemy into a creature of insatiable lust.

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The Gift of Excess

A captured Bretonnian peasant submits as a cruel Druchii sorceress uses dark magic to reshape him into her personal font

Our Better Nature

After inter-species dating is legalized, a timid human meets his brash tiger-furry date—a trainee firefighter whose confidence unsettles his quiet world.

A Simple Game

A competitive duo's game of Horse turns steamy when their basketball hoop emits erotic responses to each swish.

The abandonned asylum

8 nerdy male friends have a bet. Spend the night into the abandonned anthro asylum. All kinds of stories are told about this place, and they think its a good way to prove they are real men.

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Sister Ties Up Werewolf Brother

By djnncnskf

RedQuill

Sister Ties Up Werewolf Brother

Caring for her feverish brother after a dog bite, a sister notices his animalistic changes and restraints him, watching his body transform beneath the sheets.

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