Underfell Stories

(this is Sans Aus and Papyrus Aus x Male!reader fanfic , pls don't say anything weird about it as this is for my own entertainment -) (Also I take the tags from my AO3 s...

(ᴠᴀʀɪᴏᴜs sᴀɴs ᴀɴᴅ ᴘᴀᴘʏʀᴜs ᴀᴜs x ʀᴇᴀᴅᴇʀ) ||ᴀɴᴅ ᴛʜᴇɴ ɪ ɢᴏ ᴀɴᴅ sᴘᴏɪʟ ɪᴛ ᴀʟʟ ʙʏ sᴀʏɪɴɢ sᴏᴍᴇᴛʜɪɴɢ sᴛᴜᴘɪᴅ ʟɪᴋᴇ "ɪ ʟᴏᴠᴇ ʏᴏᴜ."|| Life was merciful enough to grace you...

|Remake of the BittyTale × Reader story| ♡There will be more lore inside and the story will be longer♡ ♡Will it have the same ending? I'm not too sure yet♡ ♡Will it fo...

What if someone from our world became error and didn't destroy au's and left that for nightmare and his gang and claims au's? ( different things including personalities

Underfell shifting

What happens if all the undertale aus, are children?!?!? Ink creates a daycare to keep them all safe! Read on, even though barely anyone will see this.

An Undertale Multiverse I'm working on. AUs are various nations around a fantasy world with various continents and islands.

All she wanted to do was to settle down a bit with her children and live peacefully.... ...So why the hell did these skeletons and this woman appear in front of their h...

Papercrane, Red, Blue, Stitches, and Error fell into the void during a battle. Somehow, they end up in Rainworld as Slugcats

What happens when the timeline glitches during Chara's conversation with Frisk in a genocide run?

It's been a six years since you and the Skeleton brothers moved into the Ruins, claiming one of the old houses in the city as your own. Astigma has another brother now...

Undertale au ships May be smut in some chapters but will be warned if are Look at first chapter labeled info for more information Also non of the art or chacters (unless...

Basically some funny crack skits I guess

After the monsters broke free from the underground they enslaved all of humanity. The monsters took complete control over the world and the world was powerless to stop t...

A collection of fluff and angst! Fandom: Undertale (UTMV) The prompts are from @fictober-event over on tumblr. Cover art does not belong to me! It will be taken down if...

(mostly it sans and papyrus!) (i updated the name to Undertale AU x reader before it was sans AU x child!reader/mother!reader) this is also my first one shot, I apologiz...

It has been 10 years since the monster broke free from the barrier, and since then monsters and humans live together in peace. But for some reason, monsters have somehow...

What would it be like if the soul of fear existed in Xgaster universe? Let's find out and see if things change

A cute collection where you meet variations of Sans and Papyrus and hit it off. once I finish the one shots I might go back through and make the most popular ones a full...

UNDERTALE IS BY: Toby Fox UNDERFELL IS BY: victhefella on Tumblr These one-shots are SFW, Under-fell based characters x a gender neutral reader. This is romantic and wil...