Underswap Stories

A box has been left at your doorstep. thinking that someone must've given you the wrong mail, you take it inside and wait for someone to come by and claim it. When a wee...

Undertale bitty bones! (Under editing)

CROSSMARE ♡ Nightmare meets his estranged brother, Dream, under a desolate tree which formerly held the very apples that split them apart. Little did he know that Dream...

when blue let's undyne do a test on to see how bright and happy his soul really is and too see how he sees everything the way he does it starts off fine but during the...

This is my first story and it will be about RWBY and the bad time trio, I do hope you enjoy this story and criticism is welcome ( I do not own Undertale, or RWBY, all ri...

Blue and Error were just having some time together in the Anti Void when they find an unlikely visitor....and he looks like Error! I don't own any of these characters

Long ago, two races ruled the Earth: HUMANS and MONSTERS. One day, war broke out between the two races. After a long battle, the humans... wait no, the monsters were vic...

This story follows an emotionally and physically abused blue (swap sans) as he discovers solace in his new abilitys to travel the multiverse to get away from his current...

Blue is always keeping himself busy, trying to run away from feelings he keeps catching on too. But it will always eat him up. He keeps acting weird and "not himsel...

A picture perfect family hides the fact that your life is filled with manipulation and abuse. When you move away after high school, you encounter more than one skeleton...

Bitty! US pap x reader x Bitty! US sans Our two little bitties have been through a lot, so what happens when they meet a human that's hurting just as much as they are...

Nightmare found a young child a long time ago. When they fell into a coma it sent him over the edge. several hundred years later the child wakes up in a castle of darkne...

This is a collection of one shots where Error is a slut.

Part 2 of AU Undertale One-Shots. I wright fluffy hurt/comfort oneshots. I do take request if I am able to do them. No lemons but there will be romace and small makeout...

You've known Sans and Papyrus for four years, but all of a sudden they cut off all contact with you after two. You mainly ignored it until one day driving to their plac...

Blue and lust becomes friends ...... Read to find out more

This is an Undertale book Criminals have always littered the streets causing a mess and breaking the law. But what happens when criminals Fall in Love? This includes all...

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...

I found this pictures on deviantart,pinterest,google and Frans Amino

so this is kinda killermare angst and Swadmare ship there's also kinda rape in it, if you don't like rape pls Don't read