Cursed (ch. 9)
By Jesse Christian 28 Jul 2025
Coach worries that Jackson might be becoming too much of a distraction to stay on the football team. And he certainly isn't wrong!
Gay Science Fiction Stories
GayDemon's gay porn library: in this story category you can find erotic Sci-Fi stories involving sex in futuristic settings.
Elias
By Metullus 23 Jul 2025
At nineteen, Elias awakens in a sterile, unfamiliar facility. His memories are scattered, his body subdued by medication. Faceless staff, restrained wrists to ankles, he question the purpose of his confinement. As unsettling routines unfold, Elias must search for the truth of his existence and the forces shaping.
Polarity
By KinklyStar456 16 Jul 2025
In a future where desire is programmable, straight men test “Polarity Bands” to monitor arousal. But one volunteer—confident, athletic, and strictly straight—gets a glitched device. With every involuntary moan, his settings shift. He still thinks he’s in control… until his body betrays him, his thoughts twist, and his legs spread.
Jungle Lust: Ethan's Tentacle Surrender
By teenhungtop 10 Jul 2025
Ethan Kane, a 21-year-old rugby god, stirred in the tangled sheets of his king-sized bed, his body sprawled across the mattress like a sculpted monument to masculine perfection.
Sperm donor
By Metullus 10 Jul 2025
Brad is a freshman at Saint Blasius' College. He's abducted by an alien who is collecting sperm. Brad is the alien's latest project.
Debt Camp (ch. 3)
By Local 5 Jul 2025
Debt Camp Finale: Re-programmed by the NeuroLoop and paraded as free-market proof, debt-camp rebel icon John Magee must flex, obey, and sell his own pulse, or watch the billionaires tighten the collar until muscle turns to profit’s last breath.
Alien Unknown
By Wyatt 4 Jul 2025
Wyatt, a senior in highschool, has his life flipped upside down one day after soccer practice. Will he be able to fight the unknown? To fight the urge to give an alien what it desires most from him?
My AI Boss Sold My Ass to Asteroid Miners
By Del Crane 4 Jul 2025
AI and robots does most jobs Ai’s run most corporations. World wide, young people live in huge single sex dorms. Gay Lenny, to get out of his dorm, gets sold for 5 yrs., as a sex slave, to miners in Asteroid Belt.
The Human Bearer (ch. 17)
By Daemon D. Hart 2 Jul 2025
A pregnant Riordan needs to serve as stimulation for seth - and cum - production in front of Lewis's many snakemen husbands.
Body take
By shifterfic 28 Jun 2025
Jock's body get's taken over by his neighbour and fucks his flatmate.
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Heat, Memory and Riley
By Blue moon 27 Jun 2025
It is the start of a new life of Kai, he *was* a normal men but future will bring great changes to him, literally.
Becoming Wesker's Experiment (ch. 2)
By Layla 24 Jun 2025
The inside of the torn building where Alpha was bringing Chris to was as horrific as the hunk remembered it to be during his failed first mission.
A Long Way Home
By Grant 17 Jun 2025
They were finished with their mission into deep space and heading back, when something went wrong.
Trapped
By trappedinthecl0set 16 Jun 2025
In future dystopia, gay man is forced to suck straight dick.
The Last Neighbors (ch. 4)
By DaddyDom 13 Jun 2025
He began to rub my skin, his fingers tracing the lines of my muscles. His touch was light, almost feather-like, but it sent shivers down my spine. I watched as his hand moved higher, his fingers brushing against the sensitive skin of my inner thigh. My breath hitched in anticipation, my body arching into his touch.
The Stereotype Ray
By astrolub 10 Jun 2025
A cat burglar steals the fabled Stereotype Ray and tests it on an unsuspecting townsman.
Serum 3379 (ch. 3)
By ShawnTVWrites 27 May 2025
Julian learns the effects of the drug trial and how ther was a mix up that has changed him potentially forever.
Bill and Me and the Heliopause
By Petr-Johan 24 May 2025
Two gay men find that the rest of their lives will be spent together in space.
Haven P. 1 (ch. 3)
By ShawnTVWrites 20 May 2025
The team from Haven meet the survivors of the Earths Cataclysm, learn and prepare for war.
Submission at the Oasis
By Zander Saldana 2nd 12 May 2025
Space Marine Jareth is lost after a battle wipes out his platoon. He learns to submit and how he's going to serve in a new life. This is campy smut with space marines, tentacles, and twist I hope you like.
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The Academy (ch. 3)
By Rochin 26 Apr 2025
Akeem introduces Eron to a new friend and they have a gay old time. Eron loses his anal virginity.
In Seclusion
By Grant 14 Apr 2025
Gustave wanted to a place he could live as he choose. A place he didn't have to worry about what others thought. No one could guess to what lengths he would go to get it.
A Soldier's Duty (ch. 2)
By B David Ethan 8 Apr 2025
Dan cruises the base's gym for a pump and finds way more than he bargained for.
Alex, Hive Mother
By Alex Aims 7 Apr 2025
Alex thought John was just a hot new coworker—until a steamy stockroom encounter revealed John’s alien secret. Now trapped in a pulsating hive, Alex births a monstrous brood, his body no longer his own.
James the Space Diplomat
By Oliver V. Cub 7 Apr 2025
It is thousands of years after Earth discovers space-travel. Sex has become an important tool for an intergalactic diplomat. This story follows our stocky space cadet, James, on his visit to an alien planet. When the planet's leader takes a liking to him, will his can-do attitude leave a good impression for Earth?
Slavery in Albion
By Mattspank 26 Mar 2025
A fantasy about a Great Britain which has legalised slavery for men
The Driftwalker
By Torsten 24 Mar 2025
The spaceship’s tiny cabin forces intimacy.
Parasite Edging Arena
By PhilipLane 19 Mar 2025
In this TV show, human beings volunteer as a battleground for two unique parasites. One inhabits the testicles, avoiding the host's ejaculation at all costs. The other attaches to the host's penis, trying to enforce orgasm. These parasites engage in a struggle using their human hosts, with only one able to emerge victorious.
Chosen by Aliens
By Staffido 15 Mar 2025
Muscular men were captured by aliens just to be dairy cows
Alphas: School for Muscle Men (ch. 2)
By RedJulian 25 Feb 2025
Ricky meets his new master at the school for Alphas.
About our gay science fiction stories
As an online source of gay erotica since 1999, GayDemon Story Library is your ultimate destination for the best adult science fiction with sexy gay guys and aliens you can enjoy for free. The vast collection of gay sex stories we host here has something for everyone who likes reading about a future where humans and species from other galaxies experience different types of sex. Download for free any short story or porn novel you like. Authors upload their stories in this section, so we ask you to respect their copyright. If it happens that you want to post a story you don't own the copyright for, do so only if you have the permission given by the author. To show your appreciation for writers and their hard work, don't forget to leave a vote and comment.