Undermafia: Deadly (Sans X Frisk)
  • Reads 15,865
  • Votes 572
  • Parts 9
  • Time 57m
  • Reads 15,865
  • Votes 572
  • Parts 9
  • Time 57m
Ongoing, First published Apr 16, 2017
"Hey, little pup?"

"Sans, I'm 18 years old now. You don't have to call me 'little pup'"

"What do you want me to call you then? 'Little boss'?"

"Really? Sans, you just mixed the two names I don't want you to call me"

"Oops, sorry..."

"Just call me Frisk when Toriel and Asgore isn't around"

Sans shrugged. "Sounds good enough for me"


Sans has known Frisk for 10 years now. He and his brother, Papyrus, has been protecting her ever since, who knew she'd also become their boss.

Watching Frisk grow up through the years, learning new things everyday, New enemies are coming for her, new obstacles started appearing, with everything popping up all at once, would they still be able to protect her?

Sans have also grown strong feelings for her. But he didn't expect to meet his rival. And he's not gonna back down to some 'God of hyperdeath'. Will he win?


WARNING: you're about to read a dangerous love story, be warned...
All Rights Reserved
Sign up to add Undermafia: Deadly (Sans X Frisk) to your library and receive updates
or
#131friskxsans
Content Guidelines
You may also like
You may also like
Slide 1 of 10
Determination ~ Family cover
I'm The Apprentice: Underfell Papyrus X Female Reader cover
Move the way the music flows(Dancetale Sans x Reader) cover
Little Things - Sans x Frisk cover
666tale (charisk au) cover
Secrets cover
Lust or Love: Sans x (older) Frisk cover
WRONG  (FlowerFell FanFiction ) cover
●~My Prisoner~● [UF!Papyrus x Fem!Reader] cover
New Possibilities(Underfell Sans X Female Reader) cover

Determination ~ Family

10 parts Complete

Frisk is living a happy life with their friends/family, the monsters! After book one in this series, they have been spending much time with Asriel and Chara as they have bonded closer with each other. Suddenly, Frisk starts acting suspicious and Sans decides that he must spy on them to make sure they're okay. What will happen when someone from Frisk's other life clashes with their new one? This is the second book in my DETERMINATION series, please read the first one before this which is just called Determination- An Undertale Fan-Fic. I do NOT own Undertale but I do own this plot/story. Thanks to Toby Fox and the Undertale team for making the best game ever! Hope you guys like this story :)