Smut fics with stories (category so I can find it all easier.)

Series Metadata

Listing Series

• My slutty Horrormare slopdrama by Afraidofww3

  Fandoms: Undertale (Video Game)  

  • Explicit
  • Creator Chose Not To Use Archive Warnings, Graphic Depictions Of Violence
  • M/M
  • Work in Progress

  04 Apr 2026

  Tags

  • Creator Chose Not To Use Archive Warnings
  • Graphic Depictions Of Violence
  • Horrortale Sans (Undertale)
  • Dreamtale Nightmare Sans (Undertale)
  • Omegaverse
  • Horrormare - Freeform
  • Smut
  • Bottom Nightmare/Dominant Horror
  • Vaginal Sex
  • Ecto-Genitalia (Undertale)
  • Ecto-Penis (Undertale)
  • Ecto-Body (Undertale)
  • Size Difference
  • Omega running a gang of Alphas
  • Guess who’s the omega guys!!!
  • Mating Cycles/In Rut
  • Mating Cycles/In Heat
  • Catering to my specific tastes
  • Marking
  • Horror has a large cock u can’t convince me otherwise
  • Rough Sex
  • Knotting
  • Aftercare
  • Naked Cuddling
  • Mild Alcohol Abuse/Alcoholism
  • Self-Lubrication
  • I guess????
  • Non-Traditional Alpha/Beta/Omega Dynamics
  • Big fat old MAN and twink dynamic basically lmao
  • Consensual Sex
  • Size Kink
  • Height Differences
  • Porn with Feelings
  • Horror and nightmare cuddle and I love them so much and JUST. Imagine. It.
  • Yes ecto-flesh is really pretty and cool by the way I like thinking of it as a light show
  • To attract potential mates.. this is what I mean by “non-traditional A/B/O dynamics”
  • Creampie
  • During editing this fic i dropped a glob of whipped cream all over my desk and NEXT to my keyboard and i was so relieved
  • i didnt expect it to happen it scared me lol

  Summary

  Horror and Nightmare have a one night stand that ends up setting off both Nightmare’s heat and Horror’s rut.
  They end up becoming a bonded pair, due to Horror.. accidentally marking his leader.
  ..
  Will they take this too far?
  WILL THEY OR WONT THEY MAKE LOVE!!!!

  ..
  Spoiler: they do. A lot.
  ..

  Picking this story up again since I thought people would probably like more Horrormare content on this archive. Wrote this originally cuz I ran out of stories to read about the two..

  Series

  • Part 1 of Smut fics with stories (category so I can find it all easier.)

  Language:

  English

  Words:

  7,561

  Chapters:

  2/?

  Kudos:

  14

  Hits:

  234

• Mindless Killermare propaganda by Afraidofww3

  Fandoms: Undertale (Video Game)  

  • Explicit
  • No Archive Warnings Apply
  • M/M
  • Work in Progress

  22 Mar 2026

  Tags

  • No Archive Warnings Apply
  • Something New Sans | Killer (Undertale)
  • Dreamtale Nightmare Sans (Undertale)
  • Bottommare.. dominant Killer
  • The skeletons here DO get a little freaky at night
  • BDSM
  • Consensual Kink
  • Bondage
  • Knifeplay
  • Very consensual. Very consensual. They want this
  • I’m tired of reading basically rape-fics about killer and nightmare I want to see them make out CONSENSUALLY
  • Out of their own free WILL
  • I Will Go Down with This Ship
  • Explicit Sexual Content
  • Smut with a Story
  • Power Exchange
  • Dom/sub Play
  • Nightmare is a sado-masochist he likes dirty dirty words he’s very submissive
  • Let me know if the positioning is strange ; nightmare is flexible but I like my smut to be a little more real

  Summary

  Continuing down the path of pleasure, Nightmare makes a series of decisions that end up giving Killer all the power.
  The king is practically wrapped around his finger— not that he knows that.

  ..
  (This is all smut from my notes app. I rewrote it to form a better story.)

  Series

  • Part 2 of Smut fics with stories (category so I can find it all easier.)

  Language:

  English

  Words:

  3,309

  Chapters:

  1/?

  Comments:

  1

  Kudos:

  13

  Hits:

  226