*You look up and see an eyeless monster staring down at you.
Frisk: "Sans?"
sans: "Gribbly's, now."
*A force tugs you to your feet. While you collect yourself, sans collects the remains of his brother. He puts Papyrus's dust in a small jar, then plops in a... pink pterodactyl.
sans: "here you go bro, i'll...i'll find a good puzzle to bury you in, i promise."
*...
Frisk: "Bleh, there's been too much sentimental crap today. Let's get down to business."
*You clench your fists, y-
sans: "don't bother, you won't be able to attack. Trust me, I've tried to do the same thing to you."
Frisk: "...You know about this?"
*Sans nods
sans: "i can explain it as well...if you can confirm a few of my theories."
Frisk: "Y'know, no matter what you learn about me you'll never be able t-"
sans: "i know, it's pointless to struggle. this world is doomed to end... and i'm sure you'll kill me at some point."
Frisk: "Huh, you're the first person I've met who's so accepting of the inevitable. But don't think of yourself too highly for that, there's a reason people struggle. It's to stop it, to save themselves. All you've done is prove how much of a spineless skeleton you really are. Did you watch it? I bet you did, you spineless trash bag. You watched because you were too much of a coward to do a damn thing. Isn't that right, sans? You let your brother die, didn't you?"
Sans: "...You done yet?"
Stolen story; please report.
Frisk: '...His still not losing his cool. Was he this tough-skinned before? I...I need to figure out what's his plan before risking expunging information. Worst case I'll need to reset...so do try to behave, or I'll be forced to give that fool you like so much an even worse end.'
*Who says I'll let you do shit?
*You shrug.
Frisk: 'Hey, if you want to give dangerous information to the brother of the guy you just murdered feel free.'
*...
Frisk: 'That's what I thought.'
Frisk: "Fine, I'll play along. But you've got me curious, even if you've given up on saving this world, why are you helping me to destroy it?"
*You smile.
Frisk: "Do you want to burn the world sans?"
*sans stays silent.
Frisk: "Hey! I'm a mass murderer, I won't judge! So open up a bit...or my lips are staying shut."
sans: "...The reasoning is...kinda like a joke.'
Frisk: "Ooh?"
sans: "yeah, you'll need set up to understand the punchline. to put it simply, i'm a simple guy. all i want is some good food, some bad laughs, and some nice friends. but well, hehe, that's kinda impossible if everyone's dusted. but i can't do a thing to stop it. so if i had to make a compromise i'd at least hope i could keep the people i cared for safe... but that's not possible either. i was-"
Frisk: "Do all Monster's actions revolve around the stupidity of their hearts? I don't want your sob 'I'm so sad' backstory you spinless trash bag, just tell me why the fuck you're here."
sans: "...i was holding out hope that there was more to you...but there isn't, is there? you're just a horrible person that the world would be better off without...yet that same world protects you. Shows how little it must care about us small folk... but i guess you're right. Friendship, hope, peace, it's a waste of time to explain how it feels to have all that stripped away by someone who's never felt any sort of compassion in their heart." (are)
sans: "so, to put it bluntly. everything i care about will be destroyed. every hope, every dream, every smile. but i know two things, that you're responsible for it all... and that the knowledge i have...is a burden. so that's why i'm here, to make sure that before this world ends, before i die, before everything i love is destroyed-" (struggling)
*sans turns to face us, eyes as dark as the void.
Sans: "That you suffer as much as possible."