Underlustsans Stories

All the monsters have been released from the underground but what happens when creatures full of lust meet some smexy humans Note: was originally inspired by written lo...

(Y/N) is a 24-year-old girl that just finished college. She learnt everything the hard way since she lost her parents at a young age. She wasn't interested in love and f...

It's been a while since Horror's world could be considered even remotely kind. But a newcomer drops in, and reminds him that there's still sweetness to be found in life...

Ask away. Don't be shy he doesn't bite.. Too hard.

in underlust due to the infertility in the au children were treasured by everyone. Rape and and other things were banned and monsters would cover up around children but...

|| Rewrite! || (Y/n) was always alone, spending her time in her own little world of fanfiction, though after year of searching she could never find a clean Underlust San...

1. This is old and cringe. 2. I'm out of this freaking Fandom. Feel free to read and cringe though. ----- Want to read various different relationship scenarios with y...

Chara Possessed Her Sans Version Who was a Girl In This World and Started with Her All Over Again as New Partner

you fall in the undergorund and meet two skelebrothers. sans and papyrus. you and sans fall into a deep love very early... hehe

no i will not do fontcest. mostly male reader because that's really all i know hope you enjoy 💞✨

Mismatched is currently being rewritten before being continued. It will take a while for the motivation to start, however. -- Things to Consider: - This will be a shor...

The bone zone.

AND THE NIGHT BEGINS TO SHIIIIINE!

i love gay people, i just got back into undertale, im too ashamed to put this on ao3, SO! HELLO EVERYONE, YOU CAN REQUEST RAREPAIRS FEATURING KILLER SANS HERE. yes. kill...

You are (Y/n) (L/n), also the girl who tried ending herself by jumping down a hole in a mountain. Together with 'Rosie', you go through the underground and show that fuc...

Chara has been raped to many times to count so she wants to run away to mt ebott but her mom insisted to come with her so the both fall in the underground and meet many...

Here ya go filthy Lust sinners

en este fanfict te enamoraras de Lust,ese esqueleto tan lujurioso i sexi...he... Lust-anda quita...*me aparta*ven aquí hermosa~*te abraza*jeje...empecemos...

me and mars made this...... Mars turns into a random character every end of the month I guess

something weird....