Permanent Smile

Undertale (Video Game)
F/F
G
Permanent Smile
Summary
All the monsters live happily on the surface after Frisk freed them. Well almost everyone is happy...As someone who has lived through their fair share of RESETS, Sans finds it hard to accept that this time is the last time. Especially since Frisk has promised "No more RESETS" before. This combined with Sans' mysterious past leads to Sans keeping his permanent smile up so no one worries. But what happens when his façade breaks...
Note
Hey! So this is my first Fanfic, like ever, and I want to know if you guys like it, so comments are appreciated! Im not exactly sure where i want to go with this, but the story will probably have a decent number of chapters, and will hopefully end on a happy note. I'm not the best with updates and schedules and stuff, but i'll try to update once a week, and i'm super sorry if I don't post on time. That being said, here is the first chapter of "Permanent Smile".
All Chapters Forward

Dust

“Sans! That was great! Why’d you say you couldn’t sing?”

“well, i dunno, it was okay.” You respond, but your smile betrays your sheepishness.

“SANS, THAT WAS GREAT! I’M GLAD YOU SANG!”

“Y-yeah! It was really good! Why d-didn’t you ever tell us you c-could sing?” Alphys asks.

You just shrug and continue smiling, smiling for real.

“Oh my, look at the time.” Toriel starts, “It’s almost 12:00! I can’t believe we stayed here so late! I didn’t realize how busy it would be here tonight.”

‘But, mom.’ Frisk signs, giving their best pouty face.

Toriel doesn’t seem to be budging though. “No, Frisk. You must go home and get a good night’s sleep. We can’t have you staying up all night, can we?”

Frisk half hearty agrees, and it’s not long until you find yourself piled into the car, and on the way home.

It's a shorter ride back than the way there, less traffic because of the time of night it is. And soon you arrive back home, everyone immediately heading towards their beds. And you head to your bed too, suddenly realizing that you're quite tired as well.

Papyrus changes into his pajamas, and you hear him settle into bed, and you allow yourself to relax and drift off into sleep.

A crash emits loudly, causing you to sit up quickly. It's followed by a bloodcurdling scream, which comes from the room next to you. Toriel!

Not wasting anytime, you run out of your room and into hers, only to see the last bit of dust settle across the carpeted floor. Next to the dust is a child with a knife, smiling a wicked smile. A smile you know all too well.

“you!” You spit out bitterly, trying to take a step toward, but finding you can't.

“Yes, me.” They respond in Frisk’s raspy voice, walking up to where you are. “Long time no see, Sans.”

You try to move, try to activate your magic, anything, but you just… can't. You're frozen.

“HEY! What's going on?” Undyne says, barging into the room followed by a timid looking Alphys.

And it's not long before the human takes their knife through both Alphys and Undyne's bodies, not even giving them time to react before they turn to dust.

“no, no! how- what-” You stumble your words.

You thought they were okay! You thought this wouldn't happen! How could you- How could you let this happen!? You let your guard down, and this! This happens!

“What's the matter? You look white as a sheet!” They laugh, “Oh, is that your brother I hear?”

And sure enough, Papyrus comes in. “WHAT’S GOING ON? SANS WHAT ARE YOU DOING IN TORIEL AND FRISK’S ROOM?”

You try and respond, say anything, anything! But words don't come to you. And when Papyrus notices the dust spread on the floor, the knife in the human’s hand, it's too late.

Another pile of dust joins the floor, and still you can't move.

“Why didn't you even try and save your brother? At least I tried to save mine. You just stood there and watched it happen. Sicko.” They give you a sadistic smile. “But that's okay. It only makes my job easier.”

It's no surprise when Asgore comes in, just like the others, questioning what's happening before falling to the floor as well.

You finally manage to take a step toward, taking in a huge breath as you do, and choking on the fresh dust thick in the air.

“Guess it's just you and me now, huh?” They come towards you, holding the knife poised to strike. “We'll be together forever, won't we?”

0/.65 HP

RESET.

You gasp, sitting up in your bed. Looking around, you try to gather your surroundings. Snowdin? Surface? Who knows anymore.

Wait. Dark blue. Dark blue walls. The surface? But how?

You quickly turn your head to Face Papyrus’ bed. He sleeping there. Then… was it just a dream? A nightmare? But it felt… so real.

You stand up slowly on shaky legs. Is everyone else okay? You should go check. Just to be sure. It probably was just a nightmare, but just to be sure.

You go next to Papyrus, and gently touch your hand across his face. He's there. He's alive and there. Thank god.

Silently, you make your way towards Asgore's room first, too afraid to check on the kid just yet. Yup, Asgore's there, alive and well. Same with Undyne and Alphys.

Your hands start to shake as you turn the knob to the kid’s room. Taking a deep breath, you open the door, preparing for the worst.

What greets you… isn't the worst. Toriel sleeping peacefully, and the kid sleeping, but looking uncomfortable, almost like they're having a nightmare.

You would wake them, but knowing what they've been through, it might not be the best idea for either of you. The nightmare is probably of you anyways, and you don't feel like you'll be able to handle seeing the kid awake right now, after your own nightmare. You'll talk to them about it in the morning though, after you've calmed down a little.

You creep back to your room, now that you know everything is okay, trying not to dwell on your nightmare too much. Which you'll probably do tomorrow when you're more awake, but right now, you just want to sleep. So sleep you do.

Forward
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