Undertum Stories

I've noticed a lack in Undertum and Inflation stories, so here's a collection I will work on every once in awhile! From inflation to weight gain! Edit: I'm probably goin...

Mainly what the title says. Lots of Sans, ton of SANS, Undertale sans, undefell sans, ALL THE SANS. BUT WITH A CHUBBY READER. WHHHAAAAT I KNOOOOW. READ FOR THE FLUFF...

Toriel stuffs frisk

Betty spends the weekend with Toriel and learns that trying to murder Frisk isn't needed for a happy mind and that a sweet alternative is coming (cover belongs to Nommer...

I just put some undertum storys I thought of in here, it's that simple. I hope you enjoy this book though.

After so many meals and so long of being fattened up.... this is the only way it could end

A small little place for Rping weight gain. (Credit to Chub-Love-Fics on DeviantArt for cover.)

it has fontcest but only slight 18+

I just found out this was a thing and I have done a lot of research for this so now I can write a fanfic!!!!

an nightmare sans undertum story,(horror x nightmare)

Toriel gets lonely, wishing the humans didn't leave her so she eats herself into obesity.

..... i made a wattpad account for this....Merry Christmas...

your baker mother Muffet, your chubby you, and big "bad" Betty, all in one story that ends well! (art belongs to really-normal)

Frisk has grown up now and moved away to the big city to attend college. She misses her monster family, especially Sans. He comes to visit her one day and suddenly, some...