A/N: Hey! I'm back! Sure, I'm back with something completely different! But I'm back. God, I didn't even know where this came from but... Oh well. Just wanted to finish at least the Prologue before I fell asleep, so here it is! This is a Sans X Frisk and it will probably get smutty in future chapters, so fair warning for that. I'm using Frisk's POV for the prologue because it was originally written for Sans X Reader, but I changed my mind at the last second. Anyway, I do not own any of the Undertale characters. So please read, review, and I hope you enjoy!


Prologue

(Frisk POV)

Chara smiles evilly as she looks over the city she decimated. She was so proud of herself, of the multiple timelines she had done Genocide on, just for the fun of it. All she wanted was to cause pain and destruction, for no true reason. Your consciousness was not in control, and hadn't been since the ending of the first Genocide run. It had been your overwhelming curiosity that had gotten the best of you, you told yourself. You just wanted to see what the differences were from the many Pacifist runs you had already done. Why did you keep resetting just to do the same run? You lose yourself in memories of yourself and your friends, meeting them over and over again. It filled you with happiness just to think of them, but looking out of your own eyes at the world you had helped create, it killed that happiness as easily as it had appeared.

It had started out small, as everything does, but soon, it was like something had been pushing you, knife in hand, to kill your friends, the ones you so dearly loved. And the first time in the Genocide run, in the Judgement Hall… The complete and utter look of betrayal on San's face… You knew then he knew about the resets. Every. Last. One. You curl back into yourself, not wanting to think about that look anymore, knowing it had all been your fault for that run, and for the runs that followed it.

You gave Chara your soul to get the Underground and the World back. That's what you kept telling yourself. You just needed to get through one more run, and Chara would get tired of it all and go away, leaving you alone to pick up the pieces of the Underground during a new reset, but she never did.

Chara never grew tired of the games. Of the blood, the deceit. She enjoyed killing all of your friends, knowing it was your body, your face that they saw when they turned to dust. And every single time, in EVERY Timeline, Sans looked all the more tired, and as much as he called your name, not wanting to fight anymore, he was even starting to lose hope. That's the only thing that kept you here, kept you from going under completely.

You raise your eyes as Chara appears next to you in the space you now occupy in your mind.

"How are you doing, 'Partner'!" Chara said with a sickening grin, her eyes as red as the blood on her knife. You shift your eyes away. You knew that Chara liked to talk and you weren't going to give her that satisfaction anymore. You were done with her games. You didn't want to deal with any of it anymore. You just wanted to live in peace, away from Her. Chara smile grew wider, knowing exactly what you were thinking.

"Awwww, 'Partner', that's not very nice to think! We're in this together! I could never have done this alone! And we'll be together for as long as you keep holding on, which if I feel like keeping you around, could be forever!" You cringe at that thought, not wanting to even think about it that way. Bright yellow light bathed the two of you as the Reset and Continue buttons appeared before you. Chara smirked then, and side glanced at you.

"Well, I hope you're ready for another round! This is really getting fun now!" Your eyes shot open in fear as you instinctively jump at her as she is reaching for the reset button, knocking her to the side because of her surprise. You stumble, and your hand accidentally lands on the Reset button. All you hear before you black out was a scream of rage.