"Did you seriously think I can forgive you? Even you killed everyone right Infront of me?"- sans

". . ." - Frisk

•Scenario:

• sans and the human child been friends for every timeline, Frisk wasn't even a real human instead the player using the child's vessel like puppet pretending to be normal and neutral, The player always choose the pacifist route and true pacifist route many times, and of course The human child frisk is friends with sans in that every timeline like two hundred timelines.

-Sans was profoundly comfortable and close friends with the human, not knowing he's actually guiding them to keep continue picking happy endings. He would let them to do it by their selfs.

-Until in another timeline the player choose the genocide route because they've got numb on keep choosing good routes so the player curiously about the genocide, After the player tried it, they got intrigued from it. New obsession to play everyday and every timeline, The player controlling frisk to move,kill,fight and more.

•Sans notice that everything shifted change about the human wondering why they're doing this? He was already expecting they could be friends forever because he knows they're doing good well, but the expectations went wrong, he found out that frisk killing everyone right Infront of him, he saw everyone turning into dust, toriel,Asgore, Undyne,Flowey, Mettaton,Muffet,Alphys...and his brother papyrus.

• Sans always see the same route thing that the human favorite route is the "GENOCIDE" sans doesn't want frisk to pick the wrong side he knows they have a chance to change but it didn't happen. Instead they keep repeating the same almost everytime, over and over and over again.

•Sans finally had enough He has to stop frisk from doing the crime if frisk really want that damn same route game picking it like a favorite thing to play he'll force them to stop he just wanted to see the real human he used to be friends with. And he'll do everything to fix them.

Bonus:

"Why is this "💀" look so mad":