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1. Standing in the Light by goldenswordfish

   Fandoms: Undertale (Video Game)  

   • Mature
   • No Archive Warnings Apply
   • F/M, Multi
   • Work in Progress

   07 Jul 2025

   Tags

   • No Archive Warnings Apply
   • Sans (Undertale)/Reader
   • Alphys/Undyne (Undertale)
   • Frisk (Undertale)
   • Sans (Undertale)
   • Papyrus (Undertale)
   • Toriel (Undertale)
   • Alphys (Undertale)
   • Undyne (Undertale)
   • Asgore Dreemurr
   • Royal Guard 01 (Undertale)
   • Royal Guard 02 (Undertale)
   • Mettaton (Undertale)
   • Snowdin Residents (Undertale)
   • Snowdin Shopkeeper (Undertale)
   • Grillby (Undertale)
   • Monster Kid (Undertale)
   • W. D. Gaster
   • Snowdrake's Mother (Undertale)
   • Reader Is Not Frisk (Undertale)
   • Reader-Insert
   • Reader is Frisk's Oldersister
   • Female Protagonist
   • Slow Burn
   • Near Death Experiences
   • Undertale Neutral Route
   • Fluff and Angst
   • Emotional Hurt/Comfort
   • Canon-Typical Violence
   • Morally Ambiguous Character
   • Found Family
   • Royal Scientist Sans (Undertale)
   • Spoilers
   • Friends to Lovers
   • Frisk is a Little Shit (Undertale)
   • Female Frisk (Undertale)
   • Canon Sans | Classic Sans (Undertale)
   • Frisk (Undertale) Is a Sweetheart
   • Slow Build
   • Mute Frisk (Undertale)
   • Eventual Smut
   • Eventual Relationships
   • True Lab (Undertale)
   • Amalgamation (Undertale)
   • During Canon

   Summary

   You fell chasing your little sister. Now, disguised as a monster, your gambling everything to get Frisk out alive—including trusting a lazy skeleton who sees through her lies. With Asgore’s knights closing in and the king needing one last human soul, survival demands shortcuts through glowing caves and MTT Resort glitter. But Sans’s bone-dry wit and hidden power blur the line between using him… and losing your heart underground.

   Neutral Route | Slowburn Sans/Reader | Found Family | Protective Siblings | 2016 Undertale fic vibes

   Language:

   English

   Words:

   37,369

   Chapters:

   11/?

   Comments:

   24

   Kudos:

   45

   Bookmarks:

   8

   Hits:

   784