A Three Way SWAP

Chapter 1

Undertale:

Sans had always been good at convincing his brother that there was nothing of importance in that room behind the house. He sometimes wanted to tell his brother the truth, but he knew Papyrus didn't remember. He knew it was better to just keep Papyrus away from that room, away from that machine.

Sans woke up in a cold sweat, he had been dreading this day. He knew today was the day, the day the human would come out of the ruins. He had been hoping for another pacifist run, but he knew the human would soon be bored of those. He knew he had to stick to the script, he couldn't do anything to stop them if the human chose the genocide path. He headed down to his sentry station.

As the human came out, Sans did the same thing he always does. He pulled the old whoopie cushion in the hand trick, but the human didn't laugh. "that's uh, your cue to laugh" he said, hiding that deep, burning feeling he was feeling inside. They didn't laugh, that's how he knew, they chose genocide. Everyone, his brother, would die unless the human changed their path to neutral, which seemed unlikely. "or, uh, to emote at all...?" He wanted to think of something, he didn't want to watch everyone he loved disappear, but there was nothing he could do. If he broke character and did something different in front of the human, they would surely know something was up. He was stuck in a loop, and couldn't do anything about it.

Later that day, after Papyrus attempted to lead the human through all of the puzzles, as the human was wandering through Snowdin, Papyrus pondered. The human seemed familiar, somehow. He couldn't quite figure out how, but they did. Later, he was getting ready to face them. After watching the human for some time as they completed all his puzzles, he had a feeling that their life was going down a dangerous path. He had planned to face them at the edge of Snowdin, just before the entrance to waterfall.

He wanted to help them, they seemed to be in need of a friend. While preparing, he had a small feeling of worry. What if the human doesn't spare him? What about Sans? He had to be here for Sans, who would take care of him if he wasn't? These thoughts didn't stop him however, for he truly believed that the human would choose to spare him. They had to.

Papyrus had just left his house when he saw some light reflect off a piece of what appeared to be a broken bottle behind his house. He assumed that some monsters must have had a little too much to drink while wandering through Snowdin as he had seen a few of these broken bottles throughout town. This brought his attention to the room behind his house. He had thought of it so little, that he forgot it was even there. Sans told him to stay away from it and that it was just an empty room for storage, but a part of Papyrus wanted to know what was inside.

His curiosity lead him to try the door. It was locked, of course, but now Papyrus was actually really curious. Why does his brother want him to stay away from this room? Papyrus quickly ran into his house to see if he could find a key or something to unlock the door. He quickly found it after searching Sans's room. He went back outside to unlock the door. "LET'S SEE WHAT'S BEHIND THIS, THEN I'LL GO TALK TO THE HUMAN."

Sans knew time was running out. Everyone had started to evacuate Snowdin. The air was filled with dust. Part of him just wanted it to be over. He couldn't stand waiting for the inevitable. He wanted to find Papyrus. He wanted to prevent Papyrus from facing the human, but he knew that he had to stick to the game's programing. He hated that. He hated that his life was just a sick game, filled with resets. He hated that he was the only one who knew. He hated that he couldn't share his pain with anyone. He wished for once the human would just finish a pacifist run and then be done, but they always had to reset. He waited in the forest, ready to watch his brother die, and not be able to do anything about it.

Papyrus unlocked the door, only to find a machine. It looked old and mysterious. "WHY WOULD SANS HAVE A BIG SCIENCE MACHINE HERE?" Papyrus checked to drawers in the room, where he found a photo. Written on it, "don't forget." It was Sans's handwriting. On the picture, he saw a younger version of himself, Sans, and another tall man who he had no memory of. Papyrus looked at the machine, he wondered what it did. It seemed to be broken, but Papyrus saw a cord. He decided to plug the machine into the wall just to see if it would work. As it turned on it began to glitch. Papyrus just stood there, curious more than ever, determined to find out what this machine would do. He saw a red button begin to flash on the machine, as the machine began to glitch out even more. Without thinking, Papyrus pressed the red button. The lights in the room began to flicker as well, but then, everything went black.