Frisk could just make out the shape of skyscrapers in the distance, the first sign of humanity they had seen for what seemed like an eternity. "Well kid, you did it" Frisk looked back at Sans, he was grinning ear to ear, well he didn't have ears, but you get the point. Frisk nodded once and looked back down at the knife, barely sharp enough to draw blood, good thing they had never needed to use it. Sans tilted his head "Hey kid, lighten up a bit, hey if its 'cus of my little confession back in the mall, I was just joking"

Frisk lay the knife down next to them and stood up "It's not that Sans, don't worry about that, I've seen a lot worse from you". Sans chuckled, he pulled a miniature femur from his pocket and starting flipping it in his hand "Hey c'mon kid, my jokes aren't that bad. C'mon, you've got no right to be down now, you've come so far, and you haven't even received any LOVE, if you get what I mean"

Frisk turned back to Sans and looked him dead in the eye sockets, guilt in their eyes. Sans gave him a quizzical look, but didn't drop the grin "Hey, what's that look for? I'm not wrong, am I? Kid, you got us our happy ending, stop frowning, you look like you're on another date with Papyrus"

Frisk let a single laugh break out "Yeah, you've got your happy ending, and I couldn't be happier. But…I'm never gonna see that ending Sans". Sans' grin dropped ever so slightly, but he barely reacted at all "Kid…I don't know what you're talking about, why not?" Frisk smiled sadly and shook their head "You know, don't pretend you don't, its eating away at you right now, but you're just hoping I don't know yet"

Sans closed his eyes and grinned slightly wider "When did I tell you?" Frisk picked up the knife and looked at themself in the reflection. "You didn't, I picked up a few hints." Sans opened his eyes, his pinprick pupils looked off into the distance "Kid, whatever you've seen, it's gone, we're here now, and you just need to choose not to undo it"

Frisk shook their head "Not everything can be undone. I was so, completely content when I got here the first time. But I was just too curious. I've watched you die Sans. Twice". Sans closed his eyes again, never dropping his grin "Huh, that a fact?" Sans opened his eyes only slightly "But I gave you a bad time, didn't I?" Sans looked back at the sunrise "Wait…twice?"

Frisk nodded, they let the knife droop by their side "And now you get it. Last time we went with the others, we talked, we laughed, and we went to get reacquainted with the world" Frisk looked back up at Sans, Frisk's eyes looked almost…empty. "And then I watched her murder you all, one by one, she started with you. You never saw it coming". Sans just stared, if the grin was starting to become fake, no-one could have ever seen it.

Frisk took a step forward "I'll never see that happy ending because it will never happen, not while she's got me under her thumb. This was all her plan, she let me back into the world so she could destroy it. But I thought up a way around it" Sans started flipping the femur again "Why do I get the feeling I'm not gonna like this idea?"

Frisk took another step forward "If my timeline ends here, now, before she takes control…" Sans closed his eyes "Kid…" Frisk started yelling "This is my fault! I killed everyone, Toriel, Papyrus, Asgore, you. I did it because I could, therefore I had to. Drop your damn pity! You didn't show me any while I was doing it. That was probably for the best"

Sans didn't open his eyes "Kid…no offence…but I truly didn't believe you had it in you". Frisk looked at the ground "Me neither". Sans scratched the side of his skull. "You sure? You sure there isn't any other way, any choice you can make to change it?" Frisk closed their own eyes "I made my choice long ago"

Sans nodded "Fine. Y'know, it's a beautiful day, birds are singin', flowers are bloomin', on days like these, kids like you…" Sans opened his eyes, his pinprick white pupils were slightly distorted, as if wet with tears, but his grin went on "…should be getting a better ending than this. See ya Frisk". Sans swung his arm down and Frisk was pulled to the floor, they pushed themself up and jumped with practiced timing, Sans extended his hand and a storm of sharpened femurs flew out of his ribcage, once again Frisk dodged them with perfect accuracy. Sans raised his arms and giant skulls flew out of the cave entrance, Frisk ducked and dodged between their beams flawlessly.

Sans slowly returned his hands to his pockets "Kid, this was your idea, just…" Sans ducked as Frisk picked up the knife and swung it towards Sans' neck. Sans stepped back a few paces "What are you doing?" Frisk turned to Sans, knife in hand, they wore a smile from ear to ear, so innocent. Their eyes twinkled with red.

Sans sighed deeply "It's you". He started spinning another femur "Chara…it's been a long time. I was there for your funeral" Chara thrust the knife at Sans' ribcage, he simply stepped to the side and walked back a few steps.

Sans closed his eyes and stretched his arms, still holding his stagnant grin. "Chara…I know what you've done. You've killed my brother, you've killed my king, you've murdered all my friends. And now you've denied my friend the ending they've worked so hard for. I'd warn you about what happens next, but you already know. Buddy, I've got news for you"

Sans opened his eyes, revealing the empty, infinite blackness inside his eye sockets. "You're about to have a bad time"