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.

The Superior Machine: Nathan's Ascension

By OldFashioned 3 Jan 2023

A continuation of the converted "The Superior Machine" by steveabc.

9.1 (7) 1264 26 Min Comments

Nate's Transformation

By DickDork 24 Dec 2022

Nate finally succumbs to the temptations of visiting a local rubber store...but ends up getting much more personal and hands on treatment than he was expecting, leading to a far more permanent solution.

9.3 (88) 12156 29 Min Comments

The Cycle of Endless Pleasure

By Thomas Hardt 19 Oct 2022

All Eric wanted was a romantic getaway with his husband, but he gets stuck in a time loop, forced to repeat the same sex over and over again. He tries to escape his reality and quickly realizes that things are much weirder than he initially thought.

9.6 (31) 4201 31 Min Comments

Swopped Bodies

By PCLatex 18 Oct 2022

Len, a would be Transwoman, gets his wish thanks to some alien technology when he and his lesbian girlfriend Liz, a would be Transman, get to swop bodies. The only problem is they are now 'tied' to each other, yet still both Gay and Lesbian -- unless together. As others also swop, things get complicated ...

8.9 (5) 778 93 Min Comments

Halloween Series 2022 (ch. 3)

By Grant 4 Oct 2022

The Cave - Charles staggered to his feet and winced at the pain in his side. He pulled his hand away seeing it covered in his blood. He needed medical attention and soon, otherwise he would be like his fellow soldiers, another statistic to this horrible war.

9.2 (52) 1270 21 Min Comments

Orbital Love

By Hunknown 30 Sep 2022

After an emergency evacuation, Andros is the only man left at Sky, the first and only orbital station ever built by the mankind. 'Sky is falling', the orbital station is doomed, and Andros with it, but he doesn't care, as no one will miss him. But... is it so?

9.0 (40) 2088 19 Min Comments

The internet of things

By Brad Lewis 14 Sep 2022

Waking with a hangover things are not quite as they were.....

6.2 (11) 809 3 Min Comments

The Silicon Commando

By PCLatex 29 Aug 2022

When Captain Niall Coventry's life partner is captured by the Danog and transformed into a latex sex slave, their lives are changed forever. But the Danog have made a fatal mistake, Niall has himself transformed and leads a special task force of the rescued sex slaves to sabotage the Danog's home bases and bring to an end their ravages of human colonies ...

9.4 (29) 2287 58 Min Comments

Gay Encounters of The Third Kind

By Bert LaVey 26 Aug 2022

He was at the busstop. He was so hot my dick started getting hard in my pants and he was flagging me down! This black guy had everything! And everything I WANTED when I saw how big his crotch was! But he couldn't be gay, could he? He had missed his bus out of town and needed a place for the night and was willing to pay a few bucks! Maye we could work out a deal! I told him 'no problem-bo!'

8.4 (53) 3306 8 Min Comments

Inside His Head (ch. 3)

By Ryan Jones 12 Aug 2022

After that last message (see chapter 2) we were a little bit in shock. What now? Our relationship is getting stronger and stronger as the days go by but the outside influences, mainly coming from who knows where, are a bit of a disruption! This all comes to a unique ending with our triad finding out the true purpose!

8.8 (8) 431 40 Min Comments

Probed in Space

By GreatBallzNCock 9 Aug 2022

In a far off galaxy in the present, a UFO makes it’s way along many planets and stars. It’s occupants on the other hand do not care for stars or planets. No, these unearthly beggars just want to plant their seed in as many times as they can in any form of crevice they can get their hands on. With a little probing they can’t go wrong.

6.5 (10) 705 2 Min Comments

Becoming Wesker's Experiment

By Layla 5 Aug 2022

Chris Redfield is the subject of Wesker's debauched experiment where he was reduced to nothing but a muscle meat for his pleasure

8.4 (42) 5157 8 Min Comments

Penis 92: Welcome to the Cum Farm (ch. 2)

By NineThreeKD 5 Aug 2022

College jock guides a shy, awkward nerd through his first public ejaculation in a mysterious research lab.

9.3 (60) 6359 6 Min Comments

Experiments Straight Guys (ch. 2)

By Jacksonville 3 Aug 2022

After Nolan and his friend return home from the Alien ship there seem not to be able to return to normal life.

8.8 (79) 11270 10 Min Comments

Drone, Inc

By P.J. 29 Jul 2022

Let Fastos the alien take you behind the scenes at DRONE, INC., the galaxy’s hottest manufacturer of realistic sex drones

8.7 (42) 2355 14 Min Comments

The Differing (ch. 3)

By Grant 25 Jul 2022

A continuation of the story about Corbett and Duncan and their search for the meaning behind the relics.

9.8 (38) 1047 90 Min Comments

The Throb-Warehouse

By GreatBallzNCock 20 Jul 2022

When a new global product causes chaos amongst human kind.

7.4 (16) 1795 3 Min Comments

Life Changer

By PCLatex 14 Jul 2022

Jim and Dennis have bought an old house which they plan to renovate. In the process they discover it has a very well equipped 'fetish dungeon' beneath it and, being into latex and bondage themselves, invite their friends -- The Gang -- round to explore it with them. The discovery of a very strange device leads to an unexpected and permanent change for both of them ...

9.0 (50) 4684 14 Min Comments

An Experiment In Control

By PCLatex 10 Jul 2022

Joe's fantasies become real when he has to leave home and moves in with his mentor at university. Short of money, he takes a job in a research lab focussed on mind control ...

9.1 (40) 6928 32 Min Comments

A treatment for my ADHD

By PCLatex 8 Jul 2022

Suffering from ADHD sucks, especially if you are above average intelligence, so when Jason is finally offered a way to beat it, and realise his potential, he opens a door into a whole new life ...

9.3 (34) 3863 73 Min Comments

The Hidden Chateau (ch. 15)

By PCLatex 23 Jun 2022

The Sardar reminds Jack of an anniversary, and a celebration is arranged. Jack and Rod find themselves at the centre of a bondage orgy. With the community now fully integrated, settled and happy, they can look forward to a very happy future.

9.3 (10) 623 18 Min Comments

In the Neon Mist (ch. 2)

By Caleb 26 May 2022

As Will searches for answers, a deadly conspiracy makes itself known: an intensely erotic encounter years in the making, murder, mayhem, and a little ABBA. Surrender yourself, at your own risk, to the Neon Mist.

9.6 (10) 1010 13 Min Comments

When the World Changed (ch. 3)

By slave mark 12 Apr 2022

CHAPTER 3 - It is the year 2070 and it is a whole different world. A drug that cures every disease has now caused my lover and me to be enslaved to the top jock on campus. The slaves are now split up while the Master takes slave paul to a sex shop.

9.6 (119) 2236 13 Min Comments

Freeballing

By Shadesofdesires 9 Apr 2022

And then, there I was, in this world.

7.0 (7) 1455 5 Min Comments

Star Date

By Jaybradman 13 Mar 2022

Commander Gib is desperate to save his ship and complete is mission. Will this big cocked creature be able to save him?

9.2 (48) 2932 11 Min Comments

My Step Bro's Literal Crotch Snake

By Thanh_Tran 3 Mar 2022

Step bro comes home from college and shows me his big crotch snake, then we go on an adventure together. This is a true story. : )

6.8 (20) 6013 13 Min Comments

Luke's Big Butt Changes (ch. 2)

By Charlie Walker 1 Mar 2022

Luke's butt continues to go through changes... luckily he has his best bro Sammy to help him out!

9.5 (130) 18030 19 Min Comments

The COVID Cum Dumpster

By Thanh_Tran 1 Mar 2022

After being enlarged by a reverse shrink ray, a giant COVID-19 virus is thirsty for gay cock and needs five brave men to fill it with their hot loads.

7.4 (12) 1669 8 Min Comments

Owen’s Journeys (ch. 2)

By Remodio 21 Feb 2022

The Galaxy’s biggest prostitute, Owen, goes back to the bunk of an alien he hooked up with in a bar. But he find that they’re not alone.

9.4 (37) 2443 8 Min Comments

Sasquatch Love Hunters

By JadedGayKnight 8 Feb 2022

A lone hunter has a strange encounter with a beast in the forest

9.3 (57) 3659 7 Min Comments