#underlust undyne

[kamari333]

HAPPY BIRTHDAY UNDERLUST 2025

Underlust was first made on January 27th, 2016. It's 9 years old now! \o/

To celebrate this year, I redrew the character ref sheet that @nsfwshamecave made on January 28th, 2016. I wanted to try giving love to the wider cast <333

[theurbanlab]

[lustsansenthusiastx3]

silly thoughts on Lust!Undyne <3

wanna talk about UL undyne and how she prob feels inadequate and unhappy with her role in the underground bcuz she remembers how it was before the trait injection and being unable to be what she wanted to be in contrast to what she is now, still training but being unable to train like she used to, for as long as she used to, and as hard as she used to, she tells herself that she is happy and content helping the underground in the way she is (after all she's still giving her all to the betterment of the underground, her body and soul, that should be enough it has to be enough)

i also think that her cannon outfit is more training gear, too unprotected especially for someone who has an accurate armour in-game, im pretty sure in the cannon design she doesn't even have her armoured boots & gloves ??? tho ill check it again (she does have them, tho admittedly i feel like her torso needs a lil more, to i dont think the royal harem does more than just yk, sex, but i think it would be interesting idk im tired :[[ ) also more Alphys/Undyne would be killer ngl

[vanyzvat]

SPEAR OF... LOVE?

UNDERLUST UNDYNE HEHEHEH

The armor may be impractical but it's ok 😌

[secret-time-is-here]

An Error’s Journey

Chapter 6

Previous - First - Next

TW: Injections

Core’s word’s still confused him, then again, everything was beginning to confuse him. He felt as if there was a deeper plot hidden from him. Why would Core explicitly direct his path? Why would they warn against not listening?

Lust’s hesitation wasn’t helping his spiraling thoughts. Why couldn’t Lust tell him anything? Why did it feel like Lust was hiding something from him? Were things going to get better?

Core had made it clear they and Lust were already acquainted, would it be a long shot to say they’re plotting something? If so, what? Would Lust plan something behind his back?

His eyes focused, and he noticed he had accidentally stopped stirring the cure. He looked over to the clock in his office, the time far late into the night. Sighing, he continued to stir.

Whatever they’re planning, if they are at all, he has to trust that it’s for the better of everyone.

The door to his lab opened with a long low squeak, and someone poked their head in.

“D-Dr. S-S-Serif?” A stuttering voice asked, belonging to the lizard monster that had suddenly shown up.

“Hello, Alphys? Correct?” The monster nodded.

They hadn’t met often, only in the halls on occasion and at several Royal events, but from what he heard, Alphys is Gaster’s prized student. A brilliant mind with many ideas, but sadly poor social skills and a nervous stutter that many didn’t take her seriously for. If Sans wasn’t Gaster’s pupil at the moment, she’d easily top everyone else and take his place.

Dr.Alphys is a young yellow lizard, only seen wearing a white lab coat with her tail poking out from the back. She’s one of the few adults in the underground shorter than Sans, buck teeth poking out slightly and round glasses much like his own resting on her nose.

“Y-yes. U-uh, how’s the p-project going? I imagine d-d-difficult, b-but that’s e-expected when y-you’re working with the C-CORE.”

That had been the cover that Gaster worked nonstop on, that they were studying the core and seeing if they could use it as an energy source or as a way to break the barrier. A very viable question that many wanted to be answered, so their King allowed them to study the most dangerous and yet unknown object in their underground.

Over time, they were able to build over the pulsing white mass, creating the CORE. Soon, they even had security over the area, many guards around the place, and protections at both entrances. The CORE oddly sitting between New home and Hotland.

After a while, they had still yet to learn much about the CORE, aside from if anything were to ever fall into it, it would never return.

“Still haven’t learned much, sadly. Are you heading home for the night?”

“Y-yeah, you’re g-going to be the last in the b-b-building.”

“Thanks for letting me know, Al.”

“A-any time, Dr.Serif.”

“You can call me Sans, or Dr.Sans, two ‘Serif’s’ in the building gets a little confusing.” Alphys nodded, giving an anxious smile, before dismissing herself.

Sci looked back over at the clock, only a minute more of stirring left, then he could call Lust and see if the past week of nearly nonstop work was worth it.

Planning behind his back or not, Lust doesn't deserve to live with that sickness. No one does.

The minute passed, and he looked down at the supposed cure, a lime-green-colored mixture. An alarming opposite to the original injection, which was a revolting bright pink.

He called his lover, and it didn’t even ring for a second before a purple portal appeared before him and Lust was jumping through.

It was anxious silence as he got a syringe ready and Lust held his arm out, and it continued for several minutes after the full cure was injected.

Slowly, Lust began to shiver, and his eyelights dulled from their vibrant amethyst to a bland white.

“...How do you feel?” Lust slowly looked over to him, and with a wide smile and crying eyes, he said he was cold.

Sci was quick to get his lover a blanket, and for a moment, they cuddled. Lust practically burrowing into his sweater, curled up in his lap.

For the night, they headed back to Sci’s room, cuddling together under soft fluffy blankets. Way too late into the day to get the cure to everyone, both their timeline’s nearly parallel, a mere few minute gap between the two worlds.

The morning was exciting and prosperous, Lust heading off to UnderLust to tell everyone of the good news while Gaster and Sci headed to the lab to get the rest of the batch prepared for transport and to get a new batch started.

Before long, Sci met the Royal scientist and helped her first, before beginning to work together with the robot she had made to spread the word more. He decided not to question Lust when he learned that the scientist is another version of Alphys. 

Is Sci destined to give up his position? Why would Lust give up his position? Especially since throughout the study of the cure, he’s shown that he still loves science and never stopped loving it.

King Asgore was tough to sway, but soon they were able to convince him as well as Toriel, who for some reason was no longer Queen. He tried not to question that either, but, if Lust’s timeline was ahead of his, what did that mean for Sci?

Next was the Royal Guard. He soon meets a fish monster named Undyne, the captain of the Royal Guard, who seemed to be close friends of Pink. Did that mean his Papyrus would eventually make friends?

Undyne insisted she and Alphys could take things over from there and suggested that Lust and Sci take a break. They tried their best to fight back, but Undyne didn’t budge.

Lust just shook his head, smiling, and soon Sci was dragged to the UnerLust copy of the cave they confessed in, but someone was waiting for them.

“Hello, Sci.” Core’s ominous voice rang through the small cave, “I can’t keep you long, so I’ll cut to the piece of advice I can give you: Sometimes you’re going to have to let go, just don’t let go of hope.”

-

All characters belong to their respected creators

[ladyarkytiorofdunans]

Pixel Art

Day 45-46: Underlust Undyne + Armor

[alumort]

This is for the cover of a fanfic that I’m starting to write :)

@nsfwshamecave it’s Underlust. I know that they’re horny as hell, but there’s always gonna to be bullied ppl, and Alphys is one of them.

Chubby and small, no one wanted to come close to her. She started to stop going out of the LAB, more with what happened to Mettaton. Alphys felt too guilty and sad, because it was her fault.

Before she stopped going outside, she met Undyne. And, even if she was on heat and may not have told her compliments if she wasn’t, she made Alphys feel beautiful again.

And that’s why, everytime that they finish, Alphys starts crying. She doesn’t want that the only monster that accepted her body, left her away.

Or, that’s my headcannon. We all know that they don’t just watch anime together xD I hope you like it <3

[puffbunnytail]

i did a mistake and now i shall show the world

A Super Mario Au no one wanted nor need nor should it exist

@yebbyy