Scientists discover an alien organism in local water samples while a parasite begins taking hold of a young woman named Leah, heralding an outbreak of corrupting influence.
#modification
559 stories tagged with this.
Bound and blindfolded by aliens, a man endures intimate experiments designed to force humanity's rapid evolution.
A heavy-drinking party girl hooks up with multiple strangers at an out-of-town nightclub, with her nervous friend along for the ride.
A woman with lifelong penis envy uses her prosthetic-limb design expertise to create a working appendage for herself.
A virgin scientist nerd tests his genital-switching device on himself with a female friend monitoring, exploring the boundaries of sex and gender transformation.
A tomboyish futanari woman deliberately prolapses her womb to use as an external sexual organ, taking her exhibitionism to an extreme new level.
A dark overlord creates the perfect man and woman from blood and souls as the battle between the living and the dead erupts.
A burned-out partner formalizes a BDSM contract to become their dominant's sex object, relinquishing all decisions and autonomy.
A man uses a mysterious computer program to modify his own body, beginning with dramatically enlarging his penis and testicles while wondering how far he can push the limits.
A man with samhainophobia hides from Halloween while his flatmates return from a wild party to regale him with their costumed sexual adventures.
Sophie continues her quest to develop a sex-enhancing drug, testing it on Daniel while exploring her unexpected attraction to a woman she meets at a club.
An alien-induced transformation leaves a man with an enormous cock in a park, where he immediately satisfies a stranger before more sexual encounters unfold.
Captured by enigmatic space pirates, Cait and Rhys are transported to an uncertain fate aboard a mysterious base of operations.
Mother and daughter trick-or-treat at a mad scientist's mansion and are subjected to body modifications that turn them into perpetually aroused sex toys.
A young farmer shares intimate moments with an oni woman in her cavern home after bonding over food and adventure.
A young man named Kevin embarks on a relationship and mysterious transformation after meeting his girlfriend Claire, who lives in a high-rise apartment.
Commander Brock leads an ogre siege against a fortified citadel, breaching walls and burning the stronghold while awaiting the enemy's next move.
A wealthy, introverted art dealer and his Latina wife discover a shared kink centered on weight gain and pregnancy after his sudden rise to fortune.
Erin and Megan, transformed by the alien Organism X, confront their new nature while preparing to turn another victim.
On the run from a drug dealer, a former captive nurse and her captor explore their bondage fantasies at a remote cottage hideout.