Undertalesans Stories

--Long ago, two races ruled over Earth-- --HUMANS and MONSTERS-- --One day, war broke out between the two races-- --After a long battle, the Humans were victorious-- --T...

Moved from AO3 because of reasons! "You are the only maid (or worker in general) that serves for the Skeletal Household. It's a skele-ton of work, but you manage by...

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...

Monsters are now free to roam the surface, though it wasn't exactly the kind of freedom they were looking forward to as humans discriminate and restrict them from coexis...

Since there is no or any "bonely hearts club x female reader" I will be the first one to do it... so I hope you enjoy this book.

After the disappearance of Y/n, Sans decides to head out into the multiverse and find them before it's too late. Nightmare remains a formidable enemy as Cross is pulled...

Just some sans x reader oneshots And once in a while au Sans too :D All characters except yourself belong to Toby Fox creator of Undertale. If you haven't played the gam...

An au sanses x MONSTER reader x au papyruses? Papyri? A fanfiction, it is not self-indulgent. So if your just lookin for some fanfiction to put yourself in, here it is...

Warning this contains suicidal thoughts. If you're sensitive to that sorta stuff I don't recommend reading this.

this is about sans x male reader wich is kinda fun to do soo plz enjoy

ok so some of these are from Milo_Cally and some are from Alisha-pleb and this is a Dust x reader book so don't judge this on ok and some of them is funny ok so you shou...

a golden soul so a exceptionally rare soul that provides great power but comes at a price most monsters thinks the golden soul is a myth but what happens when a monster...

Hello! I made a one shots thing uwu. I won't be taking requests rn. Idk when I'll open them again. Will be very much appreciated!

Everything was normal in Nightmares castle. All the 'Bad sanses' were doing their thing. Well, what happens when they decide to question Nightmares mysterious past and s...

when the monsters finally get to the surface, what happens when sans is abandoned? when his friends start to not really notice him, a horrible feeling of loneliness sets...

This is a medieval AU, where Classic is a prince of a kingdom, while Red is a thief/bandit in the Kingdom Classic isn't happy with his life, all the formalities and etiq...

Not everyone is special enough to know exactly where the Underground's secret entrance is. Not everyone is so special as to accidentally fall into it, either. Of course...

This Is A Fan Fic For My Favorite Undertale AU Ship Honey Mustard! (US!Papy x UF!Sans) -Disclaimer- UnderSwap Papyrus and UnderFell Sans do not belong to me. UnderSwap P...

The king of hell (fell sans) saw a new monster in the after life, an angel (classic sans). Though he was in hell he still wants someone to love. So how does he make clas...

𝐍𝐢𝐠𝐡𝐭𝐦𝐚𝐫𝐞 𝐡𝐚𝐬 𝐠𝐫𝐨𝐰𝐧 𝐢𝐧𝐬𝐚𝐧𝐞. 𝐇𝐞 𝐧𝐨 𝐥𝐨𝐧𝐠𝐞𝐫 𝐞𝐱𝐢𝐬𝐭𝐬. 𝐈𝐭 𝐜𝐚𝐮𝐬𝐞𝐬 𝐦𝐚𝐧𝐲 𝐭𝐨 𝐟𝐞𝐞𝐥 𝐞𝐦𝐩𝐭𝐲 𝐚𝐧𝐝 𝐥𝐢𝐭𝐭𝐥𝐞 𝐦𝐨𝐧𝐬�...