Undertale smut
8 stories
Gaster sans vs Echofell gaster sans x reader by mickywickyy
mickywickyy
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"I lived alone in the city in an old apartment, no one really cared about me my hole life and it felt like it would always stay like that..but one day everything changed.
Undertale! Grillby x (Half)Monster! Reader by EmilySkelewolf
EmilySkelewolf
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You were a teen adopted by the skeleton bros, you personally hung out with Sans more then Papyrus cause if his training. Most times you both went to the ruins but, Sans wanted to take you to Grillby's. That's when you meet Grillby and the reason why you your flames increase is unknown. You are a human/fire monster
Pyromaniac Reader X Grillby by River-chan
River-chan
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The reader is a patient at a mental hospital who loves fire and just can't stop burning objects, animals, people and even yourself. You just can't stop as your mind is dying, losing your sanity. You were abandoned when you are just a baby. While no one came to visit you made you alone. Unable to control nor feel properly as a human being. Fire is the only thing you seem to ever considered as a friend in the situation you're in. Until you met the fire monster things have change completely.
In the Woods (Sans x Reader) by MZluna1214
MZluna1214
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This is my first story. Its a Sans x Reader...basically its gonna take place after the true ending. You aren't Frisk or anything, just you. Humanity is actually happy to have monsters back. So yeah. Enjoy.
No... Way... {Underfell Sans x Reader} by Featherclaw78
Featherclaw78
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When it's a normal day outside, not perfect, like there's some ominous clouds in the sky, a weird phenomenon happened. You, were on your phone, reading away on some fanfics on Wattpad. You then started to type away a story that has struck your mind, one about Undertale. You then heard something hit your window, the one behind you, and you turned to it, and shrugged and assumed it was a bug or something. But, you were wrong. Soon enough, you heard it again, and saw nothing once more. But then you heard it again, and again and again, so that to the point, you decided to look at where it was coming from. Your guesses were of someone throwing pebbles at your window or some more stupid bugs, but instead you realized that it came from the sky... "What the crap is that?!" You shouted after seeing a spec that seems to be growing, or, falling, from the sky. The spec then turns into a figure, and you feel like you recognize the thing, for some odd reason. In a matter of seconds, you then saw it fall straight down, right next to your house, and into a wooded lot across the street. You wondered what it was. So, you decided to explore.
{COMPLETED} Sans x Reader Oneshots by yumaio
yumaio
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Well, I got requested to do this and I dedicate the first part to them! Basically this is just random scenarios with you and Sans! DISCLAIMER: I do not own Undertale or you. COMPLETED Cover made by @HoundsTooth
Dying Light (Sans X Reader) (sad) by Flutterbat276
Flutterbat276
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Like the title says, it's gonna be sad. But there is a happy end to it I promise!
Cocktails and Beer. | Grillby x reader | by Featherclaw78
Featherclaw78
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A mixologist, who is rather skilled at it, gets a shady piece of mail that asks for her to go to Mt.Ebott to get a new job that gets her better pay, and also allows her to open a new bar. She knows that there's scammers everywhere in the city next to the infamous mountain, but she does it anyways, because of her curiosity. She then sees a little group, probably trustworthy, judging from the well-dressed man, and woman, and 18 year old, but she didn't expect what was going to happen next. The only reason why this story is mature, is because I feel like 13 year olds and up hear about alcohol and such, and I am not including under-aged drinking in this story. Everything else would be E for everyone. Enjoy!