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1. A Rail-ly Good Time by JMB_Writes

   Fandoms: Undertale (Video Game)  

   • Explicit
   • No Archive Warnings Apply
   • F/M
   • Complete Work

   15 May 2024

   Tags

   • No Archive Warnings Apply
   • Papyrus (Undertale)/Reader
   • Papyrus (Undertale)
   • Reader
   • Sans (Undertale)
   • Alternate Universe - Horrorswapfell (Undertale)
   • Horrorswapfell Papyrus (Undertale)
   • Horrorswapfell Sans - Freeform
   • Horrorswapfell Papyrus/Reader
   • Reader-Insert
   • Female Reader
   • Smut
   • Shameless Smut
   • Gratuitous Smut
   • Plot What Plot/Porn Without Plot
   • Self-Indulgent
   • the most self-indulgent smut I've ever written
   • i cannot be stopped
   • fuck I have to tag this
   • Train Sex
   • Public Masturbation
   • Public Sex
   • Vaginal Fingering
   • Creampie
   • Unsafe Sex
   • but it's still
   • Safe Sane and Consensual
   • Soulmates
   • Vaginal Sex
   • Penis In Vagina Sex
   • Ecto-Penis (Undertale)
   • Clothed Sex
   • Multiple Orgasms
   • Come Inflation
   • just a bit
   • Overstimulation
   • Soul Bond
   • Soul Sex
   • Breeding

   Summary

   After a Napstaton concert, you and your husband, Papyrus, are on the train journey home, with his brother, Sans, and a group of your friends. You were expecting an uneventful end to a fun day, but Papyrus has other plans. And well, who are you to say no to your loving Soulmate? All you know is that you're always up for a good time with Papyrus.

   Series

   • Part 4 of Rabbit!Papyrus

   Language:

   English

   Words:

   7,921

   Chapters:

   2/2

   Kudos:

   96

   Bookmarks:

   11

   Hits:

   2,489