#modification
558 stories tagged with this.
A woman is introduced to a bizarre new body and a dominant threesome with Devonna and her male partner.
A young woman knowingly pursues sex with her best friend's friend despite the betrayal and guilt surrounding their encounter.
A transsexual demon returns to the human world with her pregnant partner but longs for the demon realm, prompting a succubus to cross dimensions with a special gift.
A woman torn between worlds must decide whether to remain with the lustful demon Asmodeus or return to her mundane human life.
A writer compiles firsthand accounts from people who used a temporary gender-swapping pill, beginning with Eric's first experience in New York City.
A man with the superpower to transform brilliant, ugly, prudish women into gorgeous, dumb, sex-crazed bimbos sets his sights on his calculus tutor.
A hungover man wakes up in an otherworldly sanctuary surrounded by succubi and his own sisters, struggling to remember the night before as assassins close in.
A mad scientist completes a breakthrough creation process and ominously declares the Earth his new playground with its inhabitants as playthings.
A teenage boy visits his older brother's apartment and has an encounter with a mermaid, exploring the gray area between bestiality and mythology.
A man and woman share close quarters in a dark cave, where his respectful restraint leaves her aching for more.
After alien abduction leaves Tom with a permanent sixteen-inch erection, he must navigate the absurd and inconvenient side effects of his new anatomy back on Earth.
A dissatisfied young woman is abducted by mysterious figures who offer to transform her into her ideal self, beginning a body modification process that changes everything about who she is.
A routine fundraising shift takes an unexpected erotic turn when Toni encounters a mysterious red car and begins imagining a thrilling encounter with Mark.
A woman wins a national tournament for the seductive card game Voluptus Ludum, where creatures and equipment have erotic real-world consequences.
A simple farmer is chosen by alien races to invoke an ancient peace treaty and unite the galaxy, embarking on a cosmic mission of diplomacy and survival.
Eldon tries to move past his feelings for Jessica by spending time with her twin sister Gloria, a succubus, but finds the charade difficult to maintain.
A college student is kidnapped and subjected to genetic experiments that alter his body and behavior.
A man torn between women must choose who to save when his dream girl faces a life-threatening crisis.
A curious man wanders into a mysterious shop called the Human Advancement Project and is drawn into a mind-altering session with a smooth-talking doctor.