Undermagines

We do imagines, scenarios, and headcanons for Undertale and most UTAUs. NSFW and SFW are allowed, but please don't send more than 6 characters per ask.

[nihilismpastry-deactivated20230]

I think the only person the super crown hasn’t been put on is poor Waluigi. 

[undertaile-imagines]

He’s already a princess

[undertaile-imagines]

Could I possibly get a fluff a/b/o imagine for ut and horrortale sans where Omega!s/o finds out that Alpha!sans is their soulmate after a long standing crush but is too shy and worries that they might not want s/o, resulting in not confronting them about it? (Please and thank you; your blog is amazing)

this here drabble is dedicated to @nihilismpastry for her awesome fics!

Sans (Horrortale)He’d been in love from the beginning honestly. You’d been kind to him, smiled at him, didn’t even seem to mind his weird habits. Most of all…you weren’t scared of him. Even the most polite humans flinched when he or his brother moved too quickly or spoke too loudly. But you, you didn’t. He didn’t understand it. You’re a fragile human, and an omega at that. He’s a powerful, towering alpha who’s mere presence can disrupt a room. He could crush you like a bug, and you should be terrified of him. But for some reason…you weren’t. It made him confused. He wanted to protect you, for you to trust him. He wanted to keep you safe and fed and happy. Whenever he let his mind wander, all he could imagine was the two of you, together. At first he thought it was just a crush, that if he ignored it and avoided you for long enough it would go away. But after not seeing you for days, he just got worse.

“i think i’m sick, paps.”“NONSENSE, BROTHER. YOU ARE CLEARLY INFATUATED WITH THIS HUMAN! DO NOT LIE TO ME OR YOURSELF, CONFESS YOUR LOVE TO THEM ALREADY!”“love huh?”

The thought rattled around in his skull for almost a week. Papyrus was right, of course. Sans was in love. Some twisted cosmic irony decided he would fall in love with a human. He couldn’t get you out of his head. He could remember everything about you. Every detail of your face, your smile, your scent…it was driving him crazy. Eventually, he decided on a word for his feelings.

“lovesick.”

[undertaile-imagines]

Y’all thirsty

Send me asks that aren’t nsfw people, I’ve got 30 smut prompts and 0 fluff prompts

[disasterbisexual-moved]

am I the only one who thinks the headcanon of red being a hopeless romantic is so fucking cute 

[disasterbisexual-moved]

current fanon red: angry, tough, drunk 24/7, a total womanizer, not a fan of cutesy shit

potential fanon red: literally just this. if you don’t think it’s 100% accurate I don’t know what rock you’ve been hiding under 

[skelezbian]

u r literally so valid

[rehlia]

I feel like I just had a spiritual awakening thank you so much for this post GOSH

[marshmarrowsans]

This is highly and EXTREMELY valid and if this were the actual fanon Red I would probably have a crush on him unlike now

[missalyxxxa-deactivated20221104]

I have a type for big angry tuff guy who is also romantic as fuck, so I already headcanon that for red, which is why i love him so much.

[undertaile-imagines]

3.... I like numbers OK! Don’t judge me!

Numbers are great and all but damn warn a girl next time you throw a 2 at her

[undertaile-imagines]

Hello! Friend. Comrade..... Spicy Human.... Anyways I’m let’s see...(I actually forgot what I was going to do for a minute) Oh yes! Do you have a detailed rules post? Or is it just what’s in your blogs description? ThANk yOu ~The Weird one who calls herself Firefly

Rules:-don’t be a dick-what’s in the description-bow down before Cthulhu-that’s itSide note anyone ever tell you that you’re fuckin adorable? I’d die for u Firefly

[undertaile-imagines]

2..

Nani? The fuck?

[undertaile-imagines]

Are we all in agreement that Swapfell Papyrus sounds like Eminem?

Nah?

Just me?

Damn.

[ollie-oxen-free]

op the only reason they disagree is because you’re livin in 3018 with this progressive thinking

the greats were never truly appreciated in their time 😔

[undertaile-imagines]

Without Me and The Real Slim Shady are actually just SF Paps when he’s drunk.

[undertaile-imagines]

Are we all in agreement that Swapfell Papyrus sounds like Eminem?

Nah?

Just me?

Damn.

[nihilismpastry-deactivated20230]

I can totally get behind this shit. 

[undertaile-imagines]

How is it that I get a note within 10 minutes of posting and it’s senpai?

[nihilismpastry-deactivated20230]

I’m not senpai….  >///<

[undertaile-imagines]

[undertaile-imagines]

Are we all in agreement that Swapfell Papyrus sounds like Eminem?

Nah?

Just me?

Damn.

[nihilismpastry-deactivated20230]

I can totally get behind this shit. 

[undertaile-imagines]

How is it that I get a note within 10 minutes of posting and it’s senpai?

[undertaile-imagines]

Are we all in agreement that Swapfell Papyrus sounds like Eminem?

Nah?

Just me?

Damn.

[undertaile-imagines]

So uh, do you know about a/b/o dynamics? Well could I have nsfw alpha! Classic, Horror, Skullface, Fresh, & Error reactions to their omega! s/o going into heat with some breeding kink thrown in for good measure? (heat&breeding are my weakness)

Shit boi a/b/o is one of my many weaknesses…

Alpha!Sans (Undertale)-he’d have asked you about it beforehand, he knows about the messy consent issues with heats on the surface and he wanted to make sure it was ok if he *ahem* helped.

-that being said, if you said yes, he’s not holding back. He’s always scared he’s gonna hurt you, but with the way you look and SMELL, there’s no possible way for him to ignore that. Prepare for a bruised ass and bite marks everywhere. And possibly a tummy full of pups~

Alpha!Sans (Horrortale)-oh no.

-it takes about .00001 seconds for him to sniff out that smell and recognize it. Heat scents tend to draw in the uh…unwanted company…and he doesn’t want anyone interrupting. He’s going to take care of it immediately. And by that I mean, if you moan ONCE in your sleep, you’ll wake up getting fucked into the mattress by him.

Alpha!Sans (Underfresh)-he has NO CLUE what’s going on.

-this is his first time experiencing a partner in heat while he’s in a vessel, most of the things he’s infected have either been betas or from non-a/b/o universes. But holy hell is he enjoying himself. Getting it up in the first place is normally an incredible feat for an asexually reproducing parasite, but one look at you and he’s pressed up against your back.

Alpha!Sans (Errortale)-he’s the angry, panting animal alpha your mama warned you about. He’s the one that bites your neck and has his hand covered in your slick before you can even say “what?” -he’s gonna fuck you up (in the best way possible ;) )

[lucius-sin-dream-bar]

@undertaile-imagines can draw?

[undertaile-imagines]

Yes and I will love you forever if you do

[undertaile-imagines]

I've got a headcannon question if you're interested :) What do you think the skelebros (of your choice) would have on their internet search histories? xxxx

can u tell i like sans’s?

Sans (Undertale)

-science stuff, mostly skeletal anatomy charts for various animals (including humans). It’s interesting. Also pretty much every meme page in existence, and maybe some amateur porn if he forgets to delete one day.

Sans (Horrortale)

-cooking pages with recipes using a lot of meat (he sends them to Paps). Dark humor pages, probably some deep web stuff too. Not that he’s doing anything wrong, he just has a morbid curiosity and a hunger for knowledge

Sans (Fresh)-”how to feel your feelings” “how to make friends” “how to be socially acceptable” “how to get people to trust you” “parasitology”

Basically the occasional introspection, and a lot of acting/seeming more open and trustworthy. Is he trying to make you feel accepted around him so he can ask you out, or so he can lure you into a trap to infect you? Depending on who you are, the answer is probably “yes”.

[undertaile-imagines]

In honor of that one post a few clicks down, I’d like to clarify that I have not studied up on Underswap aside from the skel boys, so any headcanons are pulled directly out of my ass.

Side note: my interpretation of US Grillby is a fancy, fancy, neon man who likes food, affection, money, and being generally classy yet erratic.

[undertaile-imagines]

Welcome back Mod Scorpio!

Greetings ;P

[undertaile-imagines]

I gotta know this. How would Error, Fresh, and Ink respond to finding out that their crush had had a really rough past, and had run away from home to take refuge with the monsters after the barrier was broken to get away from their abusive family? What if they found out that the crush had scars all over their soul from where their family had purposely damaged it? And that their abusive past is why they had a phobia of abandonment and were completely touch-starved?

Sans (Error)

-He’s got scars too. As a bit of a suicidal romantic, he wouldn’t be the type to spout inspirational stuff, he’s more likely to sit down with you and compare. You tell him about your scars, and he’ll tell you about his. And he really listens too, he knows how it feels to just bottle it up and how badly it hurts. It’s rare that he’s like this, but he wants you to know that it matters. He won’t touch you, at least not nearly as much as you’d want. You’ll have to make do with string cocoons and dolls, but they feel...real somehow. Strings especially, they’re warm yet staticy, like the bottom of a laptop that’s been running too long. He’s never leaving you though, he makes sure you know that. He’s not going anywhere, but honestly? You couldn’t get away from him if you tried.

Sans (Fresh)-He doesn’t really know how to respond at first, he just stares blankly. He thought people with families were supposed to be happier? Isn’t that what’s supposed to happen, you go to your family when people are jerks? He’s...confused to say the least. Try to explain it to him, he’ll understand eventually. He doesn’t ever seem sad about it, just baffled and concerned. He’s down to help with all that there touch starvation though, just say the word and he’s there. He’s got no sense of boundaries anyway, so once you tell him that you need to be touched, he’s never gonna stop. Be prepared to get sneak attacked with hugs from behind though. 

Sans (Ink)

-Can you say creative outlets? Feeling sad? Write about it! Dissociating? Brush stroke art therapy. Angry? Woodcarving, or maybe clay chiselwork? He understands things better if they’re in art form, so he thinks if he can get you to vent in an artsy way, he can understand and help more, plus it’s like therapy, right? He’s a bit pushy about it (and sometimes he sounds like a bad motivational poster) but he means well and it shows. He wants to help you move past all the bad stuff so you can see all the good. Don’t be surprised if he dumps a bunch of stolen art supplies on your bed and just says “Please do a thing...” during one of your bad days. He’s trying.

[undertaile-imagines]

Hi! Just saw your post saying requests were open, and if it's not a huge bother, could I maybe get a little something with my love of loves; Underswap Grillby? I love that mad, tea loving fire man. I'd be thrilled with anything! Picture or headcanons! I'm sure anything you do will be awesome! :)

Grillby (Underswap)

-Prepare to be showered in food. He looooooooves cooking, so more often than not, your dates consist of him making the both of you dinner (and some nice tea and cakes for desert), and having a nice conversation.

-Talking with him is a bit odd, he seems to randomly switch from wanting to share funny stories with you and make you smile, to having deep discussions about life and it’s meaning. It takes a while to get there, but if you’re patient enough and he likes you, he has some very philosophical things to say!

-Loves to show you off. Sometimes he’ll give you fancy, brightly colored yet Victorian styled clothes to wear (and matching outfits for himself, of course), and take you dancing, or to a posh restaurant. He’s essentially saying “Look at my s/o! Look how wonderful and fabulous they are! Be jealous, for we are both very fashionable and in love.”