Gay Sci-Fi Stories

GayDemon's Stories: On this page you can find erotic fiction where you can read about futuristic gay sex and sci-fi.

Twink Assgasm Project (ch. 6)

By Mr.X 18 Nov 2024

Hannah becomes a major Diva Bitch and is fighting with TAPAIR, the AI program designed to maximize safely all 100 18 year old Twink outputs. The most remarkable Cum explosion erupts with a full-Theatre Cream pie result. This AI is the horniest Twink Lover ever!

9.7 (49) 1344 30 Min Comments

Twink Assgasm Project (ch. 5)

By Mr.X 17 Nov 2024

The young 18 year old men make new friends and lovers, learning each other's names, usually ending with cum in each other. They are in awe of the complex facility and enjoy so much open naked sexuality. The best connection will be with the AI program called TAPAIR, pronounced Tapper. Twink Assgasm Project Artificial Intelligence Resource.

9.7 (52) 1583 22 Min Comments

Brad - The Greatest Fucker

By Del Crane 16 Nov 2024

He Fucks like a Pro.. and he's a robot.

7.6 (23) 2030 2 Min Comments

Invention of Insatiable Desires: A Dr Stanford Story (ch. 5)

By Maxim R. Mayerling 16 Nov 2024

A couple of months after their transformation, Eric and Jim are back to talk to Dr Stanford, he's happy with their progress and invites them to customise their bodies for their own desires which the pair agree.

8.8 (16) 1150 11 Min Comments

Cock Sucker in Outer Space

By Del Crane 15 Nov 2024

Sucking Cock In Outer Space

8.1 (14) 1039 8 Min Comments

Twink Assgasm Project (ch. 4)

By Mr.X 15 Nov 2024

Well, the 18-year-old Twinks were told they would not believe the pleasure they were about to experience. That was so true. It was an impossible never, imagined cum fest producing oil barrels worth of man-cum that they all slurped back up. An out-of-control incident brings one guy to the fore. The collective has begun.

9.6 (57) 2102 13 Min Comments

Cave Men - Where Gay Sex Started

By Del Crane 14 Nov 2024

It's another early morning, 2040, Professor Phallus holds a sex lecture.

7.0 (24) 1415 3 Min Comments

Twink Assgasm Project (ch. 3)

By Mr.X 14 Nov 2024

The 18-year-old boys land at the facility and get an incredible tour of all levels. They are in complete disbelief of the environment in total sex. Once they see the AMPT, Anal Prostate Milking Theatre, they decide they must experience it immediately!

9.7 (62) 2736 23 Min Comments

Twink Assgasm Project (ch. 2)

By Mr.X 12 Nov 2024

18-year-old Alex receives an unexpected revelation from his Dad, the Endocrinologist, about the TAP program. Both of them are proud and supportive of his adventure. The airport hangar arrival has even more phenomenal sex than he expected. Hannah shows her true love and care for all the men and promises them an unforgettable first night on the APMS!

9.6 (72) 3720 24 Min Comments

Twink Assgasm Project

By Mr.X 11 Nov 2024

Alex is a lost 18-year-old young man. He feels the pressure of life and career with professional parents. His hormones are raging, and his sexuality and desires are being explored. A medical experiment ad in his Father's Endocrine journals piques his interest, and a sexual exploration project for him and 99 other young Twinks men.

9.6 (94) 6767 21 Min Comments

CIA's Secret Muscle Toy Training Facility

By Layla 10 Nov 2024

Not many people in the CIA know that the agency had a special program designed to train some of their elite spies to endure the harshest and most humiliating tortures that a man could ever experience.

8.7 (73) 9468 20 Min Comments

The Robo-Lips Sex Machine

By Del Crane 10 Nov 2024

Best New Product-2030, the Robo-Lips Sex Machine for a Horny Cock.

7.4 (7) 769 4 Min Comments

Cerule (ch. 8)

By Draven Moorcock 9 Nov 2024

As Jake sails with new friends, toward safety, enemies pursue them.

8.6 (10) 282 4 Min Comments

Invention of Insatiable Desires: A Dr Stanford Story (ch. 4)

By Maxim R. Mayerling 7 Nov 2024

Dr Stanford directs the newly transformed Eric and Jim, to enjoy each other and Eric being the bottom to both the Doctor and Jim huge cocks.

8.7 (13) 2024 11 Min Comments

Universe 71

By TheObserver 4 Nov 2024

The story is in the form of a science report of the observation of a parallel universe where gay sex and scat play is practiced publicly and frequently. The story contains many scat act.

8.5 (22) 2585 10 Min Comments

Apocalypse - The Shift & Change for the Better

By gloryandhope 1 Nov 2024

Despite surviving the end of the world for 120 days. October 31st would see a shift for the Harrison Clan. Food is a driving force but so is entertainment. A Man who walked into our lives three years ago walks in in a diferent way

8.2 (15) 790 10 Min Comments

Invention of Insatiable Desires: A Dr Stanford Story (ch. 3)

By Maxim R. Mayerling 31 Oct 2024

Eric and Jim awake in Dr Stanford's machine, after the doctor tells them of it's use, he turns both men in hot bodybuilders with the tools to match and Stanford invites them to try out their new bodies.

8.9 (21) 1942 7 Min Comments

Cerule (ch. 7)

By Draven Moorcock 28 Oct 2024

They have escaped the enemy for now, but can they reach Nor, the home country of the man Jake is supposed to be, Lord Par, before some other ship catches them? Jake/Par learns more about his world from his sexy would-be courtier, Wil-Kait and from some informative books.

9.5 (6) 231 14 Min Comments

Professor Phallus' 2040 Gay Sex tube lecture

By Del Crane 27 Oct 2024

Let's take  a closer at the Male Sex machine

8.0 (6) 968 4 Min Comments

Billy And The Sex Clones (ch. 2)

By Del Crane 26 Oct 2024

About once a week one of the Clones would wander in at night, after a piss break, and in the dark, fuck any mouth that presented  itself. Joe and Jim, one after another would get both their mouths fucked by a thick rock-hard Clone cock-and get a load of narcotic Cum

7.3 (14) 841 6 Min Comments

Let's Play Ball

By Del Crane 25 Oct 2024

The Winning Team gets to Fuck the Losing Team

7.4 (17) 2481 3 Min Comments

Invention of Insatiable Desires: A Dr Stanford Story (ch. 2)

By Maxim R. Mayerling 23 Oct 2024

Eric and Jim find their truck has broken down and they spend the night in Dr Stanford's mansion. However unable to sleep they discover the library and Stanford's secret kinky laboratory. The doctor then knocks them out ready for fun.

8.2 (16) 1501 8 Min Comments

Billy And The Sex Clones

By Del Crane 21 Oct 2024

He's been deeply programmed to take total care of his Men-is totally committed. All around him are huge nude bodies,with large hard and semi-hard cocks, and long dangling hairy balls.

8.4 (15) 1330 6 Min Comments

Invention of Insatiable Desires: A Dr Stanford Story

By Maxim R. Mayerling 16 Oct 2024

Jim and Eric are tasked to do work at Dr Stanford's mansion, the secret mad scientist likes the guys and so wrecks their truck, so they stay the night and he will have fun tonight.

7.1 (24) 2162 6 Min Comments

Guass and Grendel

By Demon Monster 6 Oct 2024

A warframe gay sex story between Guass and Grendel

9.5 (6) 469 26 Min Comments

GIMP toy

By ABRL 23 Sep 2024

Contract for 1 year to become a GIMP

8.9 (59) 8979 16 Min Comments

Gantu's Beach Day

By Demon Monster 9 Sep 2024

Gantu goes to the beach and has a fun time

8.8 (6) 2175 17 Min Comments

The Beast in the Nothing Room (ch. 2)

By Kyle Michel Sullivan 8 Sep 2024

A fellow cop appears in the nothing room and is forced to assault Finn.

9.4 (24) 2896 12 Min Comments

The Beast in the Nothing Room

By Kyle Michel Sullivan 7 Sep 2024

When DS Finn Winterbourne investigated unusual activity in the nearby countryside, he stumbled into a situation of absolute horror, and now had to find a way to stop a serial killer who kills no one and does not even exist...before it struck, again.

9.3 (17) 3031 12 Min Comments

The Encounter (ch. 3)

By Jaradon 5 Sep 2024

Two men bond over an alien encounter

8.3 (15) 1311 6 Min Comments

The Shadow Lord's Son (ch. 2)

By Voron Forest 28 Aug 2024

The Warlord Samir receives information that his wife, Mara, is of an accursed heritage, and he plans to confront her. Devastated, he wonders if his Bard, Brynnan Marec Mavrenn, is complicit in Mara's supposed plans to destroy him. Will the Warlord's decision to act prove deadly?

9.8 (4) 567 8 Min Comments

The Mona Lisa Mystery

By Del Crane 26 Aug 2024

Aliens had come to Earth in the year 2100, having found one of our wandering space probes. These were local aliens in our  quiet,obscure corner of the Milky Way-not any of the dominant ruling alien races.

9.1 (4) 480 11 Min Comments

Dossier of Mpreg Cases

By Ganteng 18 Aug 2024

This is an opening summary of when the world was suddenly hit by a strange phenomenon where new male subspecies emerge, the Alpha (the man of the men) and Beta (the man who can get pregnant).

9.3 (91) 7973 33 Min Comments

Keeping Secrets (ch. 5)

By Grant 26 Jul 2024

Another Chapter, another conflict requiring the team to respond.

9.9 (22) 1298 113 Min Comments

Cerule (ch. 6)

By Draven Moorcock 25 Jul 2024

A window into the enemy aboard the Imperial Brig of war, Dirvish. Lieutenant Tyrion Hest struggles to maintain his footing under the eye of a powerful Zorian Priest.

9.1 (11) 420 5 Min Comments