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1. Eternity never lasts forever by CriticalRoll

   Fandoms: Undertale (Video Game), Undertale - Alternative Universe : Underfell, Undertale - Alternative Universe : Underswap  

   • Explicit
   • Graphic Depictions Of Violence
   • F/F, F/M, M/M
   • Work in Progress

   19 Aug 2024

   Tags

   • Graphic Depictions Of Violence
   • Sans (Undertale)/Reader
   • Sans (Underfell)/Reader
   • Sans (Underswap)/Reader
   • Asgore Dreemurr/Toriel
   • Alphys/Undyne (Undertale)
   • Sans (Undertale)
   • Sans (Underfell
   • Sans (Underswap)
   • Papyrus (Undertale)
   • Papyrus (Underfell)
   • Papyrus (Underswap)
   • Frisk (Undertale)
   • Chara (Undertale)
   • Asriel Dreemurr
   • Asgore Dreemurr
   • Toriel (Undertale)
   • Undyne (Undertale)
   • Alphys (Undertale)
   • Grillby (Undertale)
   • Muffet (Undertale)
   • OCs because Reader has friends ?
   • Fluff and Angst
   • Fluff and Humor
   • Reader Is Not Chara (Undertale)
   • Reader Is Not Frisk (Undertale)
   • reader is a male
   • Reader is a mage
   • Chara is alive
   • Chara is a boy
   • asriel is alive
   • Chara Frisk and Asriel are young adults
   • Soulmates
   • Every Sans wants Reader
   • Slice of Life
   • Reader has shitty past
   • Bad Puns
   • Puns & Word Play
   • first fic
   • Back to School
   • Reader is kinda old but physically young
   • Reader has a metalic arm
   • Slow Burn
   • Slow Build
   • Maybe slow to update
   • And maybe very slow burn
   • Post-Undertale Pacifist Route
   • Reader knows how to sing
   • Reader plays music
   • male reader - Freeform
   • reader has magic
   • Reader is OP as fuck
   • Chara wtf are you doing
   • Chara Needs Therapy
   • so do you
   • Chara is just sad kid inside
   • Blood
   • Blood and Injury
   • Violence

   Summary

   You were here when monsters were trapped Underground.

   And you are still here when they were freed.

   You want to learn more about monsterkind. But being a mage make it dangerous. What if someone finds out your little secret ? Will you be able to hide it from your new friends ? And from those nosy skeletons ?

   Language:

   English

   Words:

   71,047

   Chapters:

   20/?

   Comments:

   77

   Kudos:

   471

   Bookmarks:

   83

   Hits:

   9,762