1 - 20 of 619 Works in Protective Sans (Undertale)
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“Thanks, Paps.” Sans replied, taking the blanket and dropping it over the sleeping human. Proceeding to give the child an affectionate pat on the head. The sight made Papyrus think of when he and Sans were younger.
Seeing his brother in such a state filled Papyrus with his own feeling of euphoria. After all his brother has done for him, even including all the times he has annoyed him with the puns, Papyrus felt that Sans deserved his own bit of happiness. His own chance to have the life he wants.
Or essentially five times of others witnessing Sans acting as a Father towards Frisk, the one time he admitted it.
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What happens when a monster falls in love with a human? What happens when that human is a celebrity?
Would you like to know?
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Here Comes the Bride by FandomWorld9728
Fandoms: Undertale (Video Game), Underfell - Fandom, Underswap - Fandom, Swapfell red - Fandom, Fellswap Gold - Fandom, Horrortale - Fandom, Underlust - Fandom
25 Oct 2025
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You were so excited to finally get married to your long time fiancé, only for him to leave you for another girl with nothing but a note. Lucky for you, your two best friends were there to help you through this rough patch of your life.
Series
- Part 12 of Undertales Across the Multiverse
- Part 8 of Papyrus/Reader Fics
- Part 8 of Sans/Reader Fics
- Part 1 of Here Comes the Bride
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The Underground is no place for children.
Toriel rules with cruelty and caprice, Asgore kills in the name of mercy, and Sans and Papyrus enforce the Queen’s will with bloodied hands. Every human who has fallen before has been slaughtered.
But when a silent, nonverbal child falls into this world, something shifts. Spared by Toriel on a whim, caught between Sans’s suffocating loyalty and Papyrus’s cold protection, they must learn to survive without words in a kingdom built on violence.
This is not a story of heroes or redemption. It is a story of survival, miscommunication, and the fragile bonds that grow in the darkest places. -
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Summary
You’ve heard this before. When people who haven’t conspired all wish the same thing upon you — it has to mean something
- Language:
- English
- Words:
- 3,917
- Chapters:
- 1/1
- Kudos:
- 6
- Hits:
- 39
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A Jaded Emerald by KTamao205
Fandoms: Harry Potter - J. K. Rowling, Undertale (Video Game)
16 Oct 2025
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Abandoned on Mt. Ebott at the tender age of five, young Harry's unsurprisingly died, but Death's always had a weird relationship with his variant... Meanwhile, before Flowey's revival as souless talking flower, Sans makes a discovery under the mound of snow, Papyrus has always wanted to be a big brother anyways.
*Edited Summary (29/09/2025)
Series
- Part 1 of MultiTaleVerse
- Part 1 of Arcalith
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My version of Flowerfell. Frisk, Chara, and Flowey are the main focus because I think this friendship has a (skele) ton of potential that's sometimes overlooked.
I will not be shipping Frisk, Chara, or Flowey with anybody, including each other. In this story, Frisk is seven, Chara is thirteen, and Asriel/Flowey is twelve. I will include a few scenes of Sans x Grillby, and I may include Papyrus x Mettaton, but I'm not sure.
There will be angst, and a closer look at how Frisk's health would be affected by buttercups growing out of their skin. If you don't know what that would entail, please do research before reading. Saying that it isn't pretty would be an understatement.
There will be fluff and fun and shenanigans, it isn't JUST angst.
Edit: I decided to add in an original character. Boom. -
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Monsters have been freed from their prison underground. They are finally able to explore and enjoy the world that humans refused to let them live in. Everything is going great! Maybe some humans are bad and judgemental towards them, and maybe some of them throw horrible insults at them, and maybe some do... other stuff. Well, that's no problem for The Great Papyrus! He's a tough guy! Nothing can get through his sharp bones. Not even an unexpected meeting with a human, that leads them both to an alleway and... huh, Papyrus can't seem to remember what happened next. That can't be right! His memory is sharp and always relliable!
...
Why are his clothes on the floor tho...?
...
Oh god.------------------------
Papyrus meets a stranger that's going to change his life. Not for the better unfortunately. But he has a family that will always help him!
As long as Papyrus lets them.
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Sans wasn’t doing anything wrong.
He just wanted to PROTECT you.
Even if it meant being…. a little forceful.
Series
- Part 1 of Requests
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Some random thingy I wrote in the middle of the night- :P
- Language:
- English
- Words:
- 1,236
- Chapters:
- 1/1
- Kudos:
- 5
- Hits:
- 76
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Summary
Sans did not remember his previous name, only that he had been human. Rebirth in Undertale was novel, but he adapted, until he realized that the universe he was in was not the original one.
Unfortunately, it was too late when the machine took him to another universe, into a room full of skeletons.
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Sans no recordaba su nombre anterior, solo haber sido un humano. Renacer en Undertale fue una novedad, pero se adaptó, hasta que cayó en cuenta de que el universo en el que estaba no era el original.Lamentablemente, ya era tarde cuando la máquina lo llevo a otro universo en un cuarto lleno de esqueletos.
Nota: Sé que suena como tragedia, pero en realidad es una historia bastante esponjosa de curación, o al menos eso intento. Nuestro protagonista tiene mucho trauma y lo va a sanar en una mansión llena de esqueletos incómodos
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a·me·lio·rate
To make something bad or unsatisfactory betterPapyrus has been hiding his knowledge of the resets from everyone. Well, everyone but Flowey. ...that should probably change.
Flowey needs to heal, but doing so is made extremely difficult when no one trusts you or actually wants you there. Besides your only friend, I guess.
OR: Papyrus and Flowey are besties who needs to Improve Their Mental Health™. Everyone else has issues too, I guess, but still. This is Papyrus and Flowey-centric so who cares/jSeries
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Bare Bones (Undertale Mafiatale/Mafiafell/Mobtale Sans and Reader Enemies to Lovers Romance) by aleppost
Fandoms: Undertale (Video Game)
06 Oct 2025
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After your mother (the last person that cared about you) passes away and you lose your job, you decide that you are going to move out of Ebott City to start a new life. On your last day in Ebbott City you make a wish into a fountain, and end up falling in. When you get out of the fountain however you find yourself face to face with a pair of skeleton brothers, and for some reason its now the 1930's???? It turns out that the Skeleton brothers are the head of the Mafia that runs your side of the city, and you now live in their district. Papyrus seems to be nice, Sans however is skeptical of you and your intentions and makes it known pretty quickly. Reader has to navigate living in a different time and figure out what their life will look like moving forward, and she wants these strange skeletons to be a part of it.
This is a slow-burn romance where Sans doesn't want to like you, but cannot seem to stay away. Enjoy!
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Papyrus returns from training late one evening, and decides to ask Sans if he wants anything.
Sans is not there.
Papyrus shrugged it off, knowing Sans was probably at Grillby's, eating that disgusting, greasy food again. He was probably safe, drinking ketchup, telling puns and stories...
But Papyrus had a grim feeling that was not the case.
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No update schedule for this what-so-ever, sorry!! I'll try to write as fast as I can, but don't expect it to be too often.
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You were a normal human. You went to college, you had a life, friends, family, etc. Apparently, the void didn’t care much for happy endings, and you find yourself strapped to a table in an underground lab.
It’s fine, you have plot armor.
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Or, you get sucked into the void and your soul is placed in the body of eight-year-old Sans.
Arc 1: Heritage (1-7)
Arc 2: Hell (8-10)
Arc 3: Home (11-45)
Arc 4: Heart (46-59)
Arc 5: Hostage (60-?)Series
- Part 1 of How To Be A Human Being
- Part 1 of Hounds Of Love
- Part 1 of I/Me/Myself
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Papyrus hadn't been worried! ...Well. Maybe he had been, just a bit.
It'd been a while since anyone had heard from the human, so he called to check on them. But when a conversation revealed just how young they were, he realized things had to change. They were all on their own down here. And... They had nowhere to go.
Well! If there was no one else to take care of the baby bones, Papyrus would just have to do it himself!
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Sans was trying to get through life and ignore the apathy that had settled over him for Papyrus’s sake. It was just so hard to care about anything when he knew none of it mattered. But when Papyrus had him bring the anomaly home like a lost puppy, things stopped adding up.
How could such a sweet kid be responsible for the relentless time loops?
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Frisk was used to being on their own, and they were pretty good at taking care of themself. But—Well. ...Dying hurt. They just wanted to get back to the surface! With Undyne in the way, they were hopeless.
So when a phone call from Papyrus somehow ended with an offer for them to crash at his house, Frisk could only be relieved for the break.
They could afford to rest for a while, right?
Series
- Part 4 of Finding Home
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A young lady had spent almost half of her life in the Ruins with her mother and other monsters. The only thing that could still make her heart skip a beat was her pen pal, with whom she had been exchanging letters for almost six years.
But one day, after she told him she wanted to meet up - perhaps even leave the Ruins and her family - he stopped writing back...
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Unwilling to kill to claim a soul—or to strike down the monster king to escape—Frisk chooses to stay underground. The monsters crown her their princess, and she grows up among them, a symbol of hope and peace.
But shadows from the past refuse to stay buried.
When the fragile peace begins to crack, Frisk must face what she's tried to forget. Alongside her childhood friend, Sans, she sets out to protect the only home she's ever known—and the people she loves—from a threat that spans timelines.
With original art. Inspired by Seventh Soul by 8TheKat
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Being stuck in a loveless relationship always sucks. Being stuck in a loveless relationship with an absuive psychopath is even worse.
But who knew that the long awaited silver lining would finally arrive in the form of a small group of monsters, especially that one with the blue hoodie.
Now, if only you didn't carry some secrets of your own, that would threaten that newfound peace.Series
- Part 1 of Despite everything, it's still an AU
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Month of Monsters 2025 Writing Challenge by SilvermistAnimeLover
Fandoms: Undertale (Video Game)
16 Sep 2025
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A collection of oneshots and shorts based off one-worded prompts from the September Month of Monsters Writing Challenge from my Discord server. Prompts will be listed in the first chapter, and they range from fluff to angst. Feel free to check out the first chapter (directory) to see what each prompt is about!
Fair warning, most will probably be Sans or Frisk centric.