Hey Guys! this will be my first ever multi-chapter fic for undertale. It will take place right after the Pacifist Route. it is rated T for psychological torture. this fic will be around 9 chapters. it will hopefully be full of angst and hurt comfort, so yay. everything that is in italic will be a flashback, most of them from Frisks POV, and one of them from Sans's. Also, in this fic, Frisk is a girl around the age of fifteen.

welp, that all you really need to know for this fic. I hope you enjoy, and please review if you like it!

Chapter 1-prologue

Frisk stared at the same sunset she had seen so many times. It was such a beautiful sight, and she knew that the others had thought so as well. She turned to look at her new friends standing next to her, all of them happy to be on the surface that they had waited far too long to reach.

Well, all of them except one.

Frisk knew that Sans hated every time she reset. But every time she did reset, she was only trying to make the best ending for everyone. She had tried so hard to save Asriel, and maybe even Chara. But after doing the same exact route so many times, she was beginning to think that maybe they didn't want to be saved.

Besides, every time she did reset, she could clearly see that Sans getting less and less happy.

Maybe it was time to stop. This was as good as it was going to get. It was time to continue from now on.

"Sans?" She said walking around her new mom to talk to the short skeleton. Sans tiredly turned to look at the kid.

"sup kiddo?" He said, trying to keep the mood up.

"I wanna talk to you." Frisk said, and Sand looked a little weary, but followed Frisk further down the mountain anyway. Frisk then looked at Sans 'dead' in the eye sockets. "I'm not going to do it again." She said, looking at her friend hopefully.

Sans blinked in response. "come again?" he said, trying not to get his hopes up. Frisk sighed.

"I promise I will never reset again unless the situation gets so bad that I have no choice not to." Frisk said, saying every word slowly and clearly.

Sans blinked. And then blinked again. And then he smiled more than Frisk even thought possible, and she could even see real joy in his eyes for once.

For the first time in a long time, Sans was truly happy.

Sans blinked the sleep out of his non-existent eyes, and sat up happily. The first night of many without a reset. He yawned, stretching his arms over his head, and looked around the room.

And then he stopped dead.

This wasn't the room from the hotel on the surface. He was back in his dreadful room in snowdin.

Sans couldn't believe it. Frisk had promised not to reset. That good-for-nothing kid looked him straight in the eyes and lied to him.

And Sans had never been more angry.

Frisk woke up like usual on the bed of flowers near the ruins. At first she didn't notice the change in scenery caused by the reset, but as soon as she did, she nearly had a panic attack. She had promised to never reset, and she meant it. Unless she could reset in her sleep, this wasn't caused by her. She sighed. Sans was going to be so mad. Frisk herself was mad. She had been ready to move forward just as much as Sans was.

She stood up and prepared herself from either Flowey yelling at her or being attacked ruthlessly by him.

But she never even made it that far.

She was walking towards the huge purple door like she always did, but before she could even walk through it, a very tall man appeared in front of her. He seemed to be a skeleton, but his black robe seemed to flow endlessly into the darkness. He didn't even seem real.

Without even saying anything, the strange man reached out his hands, and before Frisk could even yell for help, he grabbed her tight and teleported away.

(Present day)

Sans was starting to worry. Frisk had never taken this long before. Sometimes it took a day at most, but it had been weeks since the reset. Even though Sans was still pissed at the kid, his worry for her had started to outweigh that.

Currently he was sleeping at his post like usual, just waiting for the kid to come. But he had almost given up hope that Frisk would come at all all.

And that's when he had woke up to the sound of a stick snapping.

Frisk was coming. Finally.

Sleepily, Sans got up and followed the trail of footprints. He prepared his usual woopie cushion in the hand trick. Looking ahead, he saw that Frisk had stopped at the gate like she did every time.

Sans walked up behind her.

"h u m a n," he started, but before he could finish his usual little speech, Frisk turned around and held out her hand. Sans shook it in response, the whoopie cushion farting loudly.

Sans forced a laugh, and waited for Frisk to do the same. "hey kid this is usually your cue to laugh." Frisk didn't even bat an eye.

"Alright, let's cut the act." He said, his left eye flashing blue, "why did you reset?"

Again, Frisk didn't do anything. She just stood her. Sans's eye stopped flashing, And he studied her. Something about her seemed different. Frisk eyes were looking at nothing. She had a dead look in her eyes that scared Sans. This wasn't Frisk, not really.

And then he noticed the dust. Frisk was practically covered in it. Sans had known Frisk for a long time, and for any of the routes, she had never killed anyone. Maybe on her first route she accidentally killed a froggit out of defence, but never enough to be covered this much in dust.

Something was really wrong.