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.

Asset Protection: A Hulkling & Wiccan Tale

By Boy Mercury X 13 Dec 2025

"He’s just a baby. How hard can it be?" Famous last words. When Hulkling and Wiccan take on a secret mission to return a lost prince, they trade the throne room for a cramped cockpit and deep-space danger. But along the way, the adrenaline awakens a primal change—and the need to breed. (A Marvel U fan fic.)

9.8 (19) 1490 34 Min Comments

Darks & Pales (ch. 12)

By Hunknown 12 Dec 2025

Jason is finally ready to submit to Aric, but he has no idea what the “something special” Aric once promised truly is. Shaken to the core by the experience, he seeks solace in the Temple, where even greater surprises await him.

9.2 (13) 495 20 Min Comments

Slave Rebellion (ch. 2)

By Derekhello 7 Dec 2025

This is a sequel to Civic Experiment and Sampons Slavery Laws and continues the story of Tyler and Zac. Tyler an escaped slave is going to try and change the world back. A world he helped change and put an end to slavery and all the humiliation, once and for all.

9.6 (12) 740 34 Min Comments

Darks & Pales (ch. 11)

By Hunknown 5 Dec 2025

Vesper, the most short-tempered and narrow-minded of the Darks, threatens Jason’s life over his bond with Deimos. Young Helios steps in to defend him, and pays the price for his courage. Will this ordeal win Deimos and Jason a new ally in their quest for free love?

9.4 (15) 337 18 Min Comments

Slave Rebellion

By Derekhello 5 Dec 2025

Thie is a sequel to Civic Experiment and Sampons Slavery Laws and continues the story of Tyler and Zac. Tyler an escaped slave is going to try and change the world back. A world he helped change and put an end to slavery and all the humiliation, once and for all.

9.3 (13) 2336 33 Min Comments

Serum 3379 (ch. 6)

By ShawnTVWrites 2 Dec 2025

Julian tells Monty he's pregnant and he takes it...well.

8.8 (14) 1692 13 Min Comments

Darks & Pales (ch. 10)

By Hunknown 28 Nov 2025

Once more, Jason breaks the rules and ventures into the forbidden Temple, uncovering more unsettling and amazing truths. A storm with Archon breaks out, but the chilling gusts slowly turn into a fiery blaze.

9.2 (13) 350 20 Min Comments

The Prince

By Damon Rozen 28 Nov 2025

In Avalon’s Grand Palace, Prince Johnnie and activist Harry prepare for a wedding that symbolizes love, equality, and progress. Amid dazzling holograms and futuristic traditions, tragedy strikes when Queen Sharon suffers a fatal heart attack. Grief reshapes celebration into mourning, yet Harry’s unexpected pregnancy offers hope—promising renewal, c

4.1 (4) 192 25 Min Comments

The Jock Showers (ch. 4)

By gonzomain 27 Nov 2025

Tyson meets one of his coworkers and discovers that he's a prisoner.

8.2 (14) 1759 8 Min Comments

The Jock Showers (ch. 3)

By gonzomain 26 Nov 2025

Tyson's shift continues as he's humiliated and aroused by gymbro smells and tastes.

8.7 (20) 2525 12 Min Comments

Cursed (ch. 11)

By Jesse Christian 24 Nov 2025

Jackson discovers a whole new side of the curse that threatens to change his life forever.

9.8 (40) 4091 12 Min Comments

Darks & Pales (ch. 9)

By Hunknown 21 Nov 2025

Jason confides in Stellan about losing his virginity to Deimos. Aroused and insecure, Stellan begs Jason to take his own virginity, but Jason has a better idea: with an erotic role-play, he draws Aric in; the powerful janitor initiates Stellan to the joys of man-sex... in his very special way.

9.3 (13) 464 22 Min Comments

Darks & Pales (ch. 8)

By Hunknown 14 Nov 2025

Knowing the truth about Boba-Maiii gives to Jason a sense of freedom and self-determination, but also shakes his beliefs to their roots. Seeking solace, he turns to Deimos – strong, tender, irresistible – and offers him his most intimate gift. In that loving union, they understand that freedom begins where desire is no longer hidden.

9.4 (15) 375 21 Min Comments

Darks & Pales (ch. 7)

By Hunknown 7 Nov 2025

Jason yields to Aric’s hungry passion, his teen fantasies melting into intoxicating reality until pleasure overtakes him completely. Later, still shaken and lost in thought, he dares to enter the Temple, where he’s confronted with a shattering truth about Boba-Maiii.

9.2 (16) 419 19 Min Comments

A Boy's Anal Cybertronic Affair (ch. 5)

By Mr.X 6 Nov 2025

Well, the Twinks are in the Slings in the Lab, Ready for Xavier and Daddy Fisting. An incredible genetic and sexual ability is discovered in Hot Femboy Bobby! After it is revealed, the next step is to take Xavier home with them to the Six-Floor- Boy- Bonding Dungeon (SFBBD)

9.4 (28) 1755 19 Min Comments

A Boy's Anal Cybertronic Affair (ch. 4)

By Mr.X 3 Nov 2025

Ty gets back to the college Twink sex apartment for Gang Bang Spit Roasting and triple cock penetrations; followed by Ballroom fisting boys lined up. Bobby and Ty are in Love and crazy for each other's cum and piss. Soon they get to the Lab for the Paternity reveal... AI, wow!

9.7 (27) 2111 32 Min Comments

A Boy's Anal Cybertronic Affair (ch. 3)

By Mr.X 2 Nov 2025

Ty gets tentacle deep tongue rimmed over five feet deep by Xavier and his Mimetic Poly Silicone being; Ty finally loses his anal virginity to Xavier and his mammoth penis. The orgasms and ejaculations are magnificent, coating the BDSM theatre in boy-cum explosion. A curiosity of Mitchell's familiarity with Booby is revealed. Ty gang fucked by room

9.9 (39) 2095 20 Min Comments

A Boy's Anal Cybertronic Affair (ch. 2)

By Mr.X 1 Nov 2025

Dedicated to Bob & all the best fans and readers! Ty and Bobby have incredible first-time sex. A hilarious thing happens, but for the better, as the eight boys erupt into a great circle jerk all over Sora. A week of group sex. Ty keeps his anal virginity till his first shift at the CAME Institute. You will have to read to see what it is all about.

9.9 (42) 2202 26 Min Comments

Darks & Pales (ch. 6)

By Hunknown 31 Oct 2025

Jason’s first glimpse of the Temple leaves him unimpressed. A talk with the Guardian Archon unveils the story of Adam and Eve. Later, seeking bolder truths, Jason hits on the studly janitor Aric, who makes him take a walk on the wild side of man-love.

9.2 (17) 419 22 Min Comments

Darks & Pales (ch. 5)

By Hunknown 24 Oct 2025

Through a conversation with the Guardian Archon, Jason comes to realize that Boba-Maiii’s prohibition against wasting a man’s seed isn’t all that strict after all. The revelation stirs something in him — a cautious urge to explore his own desires, beginning with his handsome roommate, Stellan.

9.3 (16) 433 21 Min Comments

Darks & Pales (ch. 4)

By Hunknown 17 Oct 2025

Jason learns more about the wilderness surrounding Eclipse. Deimos ventures outside and is wounded by a monstrous creature. Something deep is blossoming between Jason and Deimos, and this leads to a sensual mutual 'helping', making Jason experience his first orgasm.

9.1 (17) 444 23 Min Comments

Serum 3379 (ch. 5)

By ShawnTVWrites 15 Oct 2025

Julian and Monty have sex in the gym showers.

9.7 (16) 2415 10 Min Comments

The Jock Showers (ch. 2)

By gonzomain 12 Oct 2025

Tyson shows up for his first day of work and gets a taste of what his position entails.

8.8 (29) 3243 13 Min Comments

The Jock Showers

By gonzomain 11 Oct 2025

A new disease puts gym-going men at risk. The treatment method, pioneered by a shady biotech conglomerate, is... unorthodox, to say the least. Can horny gay men the world over save mankind by licking their sweaty assholes? This story says: maybe!

8.3 (27) 5333 11 Min Comments

A Viable Candidate (ch. 4)

By gonzomain 10 Oct 2025

The man is thrust into a new sexual experiment which will test the resilience of his body and mind.

9.5 (23) 3708 18 Min Comments

Darks & Pales (ch. 3)

By Hunknown 10 Oct 2025

Jason can't stop thinking at Deimos and is unsure about what he feels. Or maybe he doesn't want understand. But after some more 'helping', Deimos and Jason share a sweet and intimate (and quite hot) moment, proving that their friendship is turning into something else.

9.4 (15) 611 20 Min Comments

Serum 3379 (ch. 4)

By ShawnTVWrites 8 Oct 2025

Julian and Monty attend a birthday party before things heat up, then Julian goes in for his 60 day check in.

9.7 (9) 2122 14 Min Comments

A Viable Candidate (ch. 3)

By gonzomain 7 Oct 2025

The man explores more of his biological prison, becoming acquainted with the creature and its own motivations. He learns of his new reality.

9.3 (31) 3198 10 Min Comments

2032 (ch. 3)

By Sadist Daddy 6 Oct 2025

Slave Starts his struggle to be sold with the display days and gets the first call for interview

8.5 (7) 1466 17 Min Comments

A Viable Candidate (ch. 2)

By gonzomain 6 Oct 2025

A man is processed and finds himself inside of an alien biological architecture. Powerless against the arousing whims of the creature, his main priority is survival.

9.3 (28) 3161 11 Min Comments

A Viable Candidate

By gonzomain 5 Oct 2025

A man wakes up in a futuristic facility, unaware of the alien machinations that await him.

7.6 (30) 3946 7 Min Comments

Darks & Pales (ch. 2)

By Hunknown 4 Oct 2025

At Eclipse, a forgotten outpost on a forgotten planet, the First Husband Deimos chooses Jason as his new Helper. At first, Jason is reluctant, because of Deimos' arrogan demeanor, but also because his job requires touching another man... intimately. But the fierce Dark and the kind Pale soon feel closer than they expected.

9.1 (20) 670 20 Min Comments

Darks & Pales

By Hunknown 3 Oct 2025

Eclipse, an underground outpost on a harsh planet at the edge of the Milky Way, once thrived with life. Now only a handful of men and two women remain, oblivious of their past. The arrogant Darks look down on the industrious Pales, who resent them in return —— yet all must obey the Law of the almighty Boba-Maiii.

9.2 (23) 1741 19 Min Comments

The Milky Way (ch. 3)

By AstroGuy42 2 Oct 2025

After all the cum Jay drank, what happened to him?

8.8 (17) 2710 6 Min Comments

The Milky Way (ch. 2)

By AstroGuy42 29 Sep 2025

Jay goes to the sketchy part of town to get enhanced like his roommate. The proprietor is not necessarily swayed by his offer, but wants Jay's business, regardless.

8.4 (18) 3020 10 Min Comments