3 Series by DefinitelyNotABee
Listing Series
-
The Third Secret Option by Embrace_the_Deep (DefinitelyNotABee)
Fandom: Undertale (Video Game)
- Teen And Up Audiences, Explicit
- Graphic Depictions Of Violence, No Archive Warnings Apply
- Gen, M/M
- Series in Progress
28 Jul 2025
- Graphic Depictions Of Violence
- No Archive Warnings Apply
- Sans & Sans (Undertale)
- Papyrus & Sans (Undertale)
- Sans/Sans (Undertale)
- Sans (Undertale)
- Sans Ensemble (Undertale)
- Original Male Character(s)
- Killer Sans (Undertale)
- _____tale Sans | Ink (Undertale)
- Dreamtale Sans | Dream (Undertale)
- Star Sanses (Undertale)
- Error Sans (Undertale)
- Dreamtale Nightmare Sans (Undertale)
- Bad Sanses | Nightmare's Gang (Undertale)
- Underfell Sans (Undertale)
- Isekai and Transmigration
- Reincarnation
- Reader is an Alternate Universe Sans (Undertale)
- Crack Treated Seriously
- psst... hey kid... want an undertale addiction?
- Quill's coat is fluffy because it's full of secrets
- and probably some spoons
- expect the unexpected
- or else
- It's Not Paranoia If They're Really Out To Get You
- Possible Future Romance
- Doodlesphere
- Alternate Universe - Underfell (Undertale)
- Nightmare's Castle
- Tags under construction
- Swearing
- Author Is Sleep Deprived
- Anti-Void (Undertale)
- Dusttale Sans (Undertale)
- Something New Sans | Killer (Undertale)
- Horrortale Sans (Undertale)
- Underswap Sans (Undertale)
- Overtale Sans (Undertale)
- science sans
- Ol' Trusty (character apparently)
- Something New (Undertale)
- Violence
- Anxiety
- Confusion
- by reader i mean OC but that's not a tag
- I Wrote This Instead of Sleeping
- Sans/Underfell Sans (Undertale)
- Quill/Red
- Gratuitous Smut
- Fluff and Smut
- Romantic Fluff
- Very spicy
- Anal Sex
- Rough Kissing
- Falling In Love
- First Time Blow Jobs
- First Time Bottoming
- Aftercare
- The Author Regrets Everything
- Words:
- 33,397
- Works:
- 1
- Bookmarks:
- 21
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Misfortune by DefinitelyNotABee, Embrace_the_Deep (DefinitelyNotABee)
Fandom: Undertale (Video Game)
23 Mar 2024
- Creator Chose Not To Use Archive Warnings
- Sans/Sans (Undertale)
- Papyrus/Sans (Undertale)
- Alphys/Undyne (Undertale)
- Papyrus & Sans (Undertale)
- Sans (Undertale)
- Papyrus (Undertale)
- W. D. Gaster
- Alternate Universe - Underfell (Undertale)
- Alternate Universe - Underswap (Undertale)
- Alternate Universe - Fellswap (Undertale)
- Alternate Universe - Original
- Original Character-centric
- Six Skeletons AU
- Alternate Universe - Horrortale (Undertale)
- eventually
- Eventual Romance
- Slow Burn
- Luck-Based Character
- Backstory Revealed as We Go
- sans oc - Freeform
- LuckTale (Original)
- Original Character Death(s)
- they don't stay dead though
- Luck!Gaster is Twisted
- Papyrus's Scarf
- The Machine - Freeform
- Depression
- Grieving
- Anxiety
- Fix-It
- magic!
- Undertale Reset Issues
- plot bunnies galore
- Misfortune Galore
- Minor Grammar Edits Ahoy!
- i am my own beta
- And I suck at it
- Words:
- 9,506
- Works:
- 1
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- Graphic Depictions Of Violence
- Papyrus (Underswap) & Original Female Character(s)
- Papyrus (Underswap) & Original Character(s)
- Papyrus & Original Undertale Character(s)
- Papyrus (Undertale)/Original Female Character(s)
- Alphys/Undyne (Undertale)
- Papyrus & Sans (Undertale)
- Sans & Original Undertale Character(s)
- Papyrus & Sans & Original Character(s)
- Papyrus (Underswap)
- Papyrus (Undertale)
- Sans (Underswap)
- Sans (Undertale)
- Original Characters
- Original Female Character(s)
- Alternate Universe - Underswap (Undertale)
- Sirens
- Aquariums
- Aquarists
- Apparently that's what they're called
- Siren!OC
- Seahorse Siren
- Animal Instincts
- Animal Abuse
- i guess?
- They call her an animal and treat her badly idk
- It Gets Worse
- Adorable Papyrus (Undertale)
- Papyrus (Undertale) Needs a Hug
- Protective Papyrus (Undertale)
- Underswap Sans is a Cinnamon Roll
- And a Cool Dude
- Non-Consensual Drug Use
- Self-Harm
- Neglect
- Abuse
- Drowning
- I will do chapter warnings
- Constructive Criticism Welcome
- POV Alternating
- I do not own any music referenced here
- Singing
- Mating Rituals
- Mating Cycles/In Heat
- Medical Inaccuracies
- Medical Malpractice
- purposeful starvation
- Blood and Violence
- Freeform
- no beta reader we die like my sleep schedule
- Underswap Sans is mature in this fic
- Papyrus is the Best (Undertale)
- Abuse of Authority
- Tags May Change
- Author Is Sleep Deprived
- there will be mistakes
- I Do Not Know Undertale AUs Well
- Author gets migraines
- Non-Consensual Kissing
- Eventual Romance
- More Drama Than You Can Shake a Stick At
- non-explicit romance
- for now :)
- Tags under construction
- Blood and Injury
- Violence
- abusive situations
- Original Character Death(s)
- Not the siren though
- perhaps
- Sans Knows More Than He Lets On (Undertale)
- Protective Sans (Undertale)
- Starvation
- consider yourselves warned
- Accidental Relationship
- Kinda
- What-If
- comedic romance
- Words:
- 29,710
- Works:
- 2
- Bookmarks:
- 2