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.

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) 6059 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 (132) 18267 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) 1685 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) 2463 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) 3709 7 Min Comments

My Life On Display

By Picture This As A Caption 29 Dec 2021

Interactive simulation narrative of the inspiring life of Ventress, the titular character.

7.0 (3) 252 1 Min Comments

It's Ok

By BadApple 7 Dec 2021

The world is left to the Bots, known as Users. Two of which, Digit and Flux; explore their physical love relationship. Digit overcoming his physical defected paranoia.

8.2 (7) 268 17 Min Comments

The Modern

By BadApple 27 Nov 2021

Welcome to dystopian world of Modern. Meet Jacks and Terminal, both high ranking soldiers. It's clear Terminal is hot under the collar. Jacks decides to help him with that, regardless of the risks?

8.6 (7) 577 3 Min Comments

Zenon

By Swimboyyy 7 Nov 2021

A Zenon takes over a human body on Earth in order to survive

9.1 (32) 2016 11 Min Comments

Possessed

By PCLatex 3 Nov 2021

A young man moves into his uncle's home, a large Georgian house, but soon learns that all is not quite as it seems.

9.0 (50) 4238 14 Min Comments

Deviant Island (ch. 5)

By PCLatex 31 Oct 2021

The Diaconate is overthrown, now there must be a reckoning and a future ... This concludes this story.

9.3 (25) 1389 11 Min Comments

Seed

By readywankerone 20 Oct 2021

Abducted, naked and alone, a man is raped by his captor. Alone, desperate and hopeless, an alien commits an unforgivable act in order to preserve the continuation of his species. Even if it means he will destroy the human he loved.

9.2 (83) 11241 10 Min Comments

A super costume party (ch. 2)

By Redouant 25 Sep 2021

This is a rewritten version of an older story I wrote. It is halloween and Josh's best friend loves to go to halloween costume parties. Josh hates dressing up and gets forced to deal with the decision wether to not go or to break out of his shame and show off as a superhero.

8.3 (34) 7458 24 Min Comments

Confessions of a Tentacle Monster (ch. 3)

By Not your Greek Hydra 17 Sep 2021

Now the fun and torture begins!

9.0 (46) 6009 8 Min Comments

Alien abduction (ch. 2)

By Desertbiguy 16 Aug 2021

Mark was abducted by aliens. He was one of several gay men who were being used as temporary sex slaves and alien baby incubator. They were fucked by master aliens who were breeders. Mark and Co would give birth a few days later.

8.1 (51) 6052 3 Min Comments

Space Slut

By Joystyx 26 Jul 2021

Liam discovers he can partake in his favorite hobby even when enlisted in the Union's space army. Liam's hobby is taking dick.

9.0 (40) 2535 22 Min Comments

ConOr

By Ty Jordan 10 Jul 2021

In a future society the government tries to eliminate crime by using a controversial medical procedure. Chico becomes a victim of this, but he finds an unlikely friend who can help him.

8.4 (36) 2980 18 Min Comments

Mandatory Pleasure

By Benji Bright 13 May 2021

The residents of 201 Fremont Lane get a visit from Agent 157 from the Agency of Mandatory Pleasure. He warns them that they haven't been having enough sex, that the State has noticed, and that there will be consequences.

9.2 (17) 1325 7 Min Comments

Abducted

By PCLatex 8 May 2021

Pete, a writer, is abducted by a strange alien race, but his friend Mike sees what is happening and jumps at the chance it offers. When they wake up in Pete's home, several things have changed permanently ...

9.0 (70) 10984 29 Min Comments

Alien Abduction (ch. 3)

By MontanaBiGuy 1 Apr 2021

More adventures during captivity. The kinkiest yet with more to cum later. This has a bit more story line in the beginning. I wanted to give hints for future stories as well.

9.2 (67) 9291 13 Min Comments

Adventures of a Doom Marine (ch. 3)

By Britman 20 Mar 2021

This is the third part and the Doom Marine, Flynn Taggart, wins out

9.1 (21) 1621 13 Min Comments

Double

By NattySoltesz 16 Mar 2021

Trying out a bro's new sex robot.

9.2 (53) 4718 15 Min Comments

Enviro Regime (ch. 5)

By Ashar Knight 4 Mar 2021

Thomas's first day as the master. He gets some filthy loving revenge on his boys.

8.3 (20) 2543 13 Min Comments

The Adonis Brothers (ch. 3)

By Void 25 Feb 2021

Nathan met the brothers only a few weeks prior. Now, a work incident that very nearly cost Nathan his life gives the brothers a chance to return the favor, and gives Nathan another chance to take a much closer look at both the brothers and their sexy super briefs.

8.0 (7) 1388 6 Min Comments

Citizen

By Benji Bright 16 Feb 2021

Rob has a respectable job and a handsome boyfriend. Like everyone, he lives his life under the close scrutiny of cameras and public opinion. But when Rob gets a ticket for smoking a cigarette, it takes him on a journey into the night world of his city and perhaps out of view of the omnipresent cameras.

9.0 (21) 1444 10 Min Comments

Descent into Darkness

By Grant 24 Jan 2021

This is not a feelgood story, quite the opposite. It’s a warning, an imagining of how things could become, especially if we had stayed on the path we had been on.

9.4 (38) 1669 48 Min Comments

Cornell, TX (ch. 12)

By Bill Drake 7 Jan 2021

Jake's big day has come, and the wedding has a surprise attendee.

9.5 (115) 13674 16 Min Comments

United

By Andy C 29 Nov 2020

Two related fragments. Football in the future.

9.3 (25) 1795 11 Min Comments

Certified Quality Men (ch. 2)

By eddie edizejavi 17 Nov 2020

We have come a long way in Genetic Engineering this past century. Now we are able to build artificial men, the perfect men to fulfill your every desire. The possibilities are endless.

8.5 (33) 5940 17 Min Comments

Living (ch. 8)

By Swimboyyy 11 Nov 2020

Something about getting a dangerous man so venerable just does it for me. Do I really have control over this Cartel boss?

9.2 (24) 1328 13 Min Comments