Undertale: REWIND

Prologue

A/N : Disclaimer here before I start. I do not own Undertale or any of these beautiful characters. Everything that's going to happen in this fanfiction is just fiction and none of it should be taken to be canon. ^^ Now, without further ado, please enjoy my first Undertale fanfic, REWIND!

"Sans ..."

Grillby looked at him with a look of realisation. Sans gulped, feeling self conscious although he was in such a familiar place. Then again, the last customer had left, leaving the two of them alone.

Sans averted his eyes from Grillby and glanced at the CLOSED sign hung in front of the double glass doors to "Grillby's (Up-grub!)"

"Looks like it's been pretty successful, huh," he said nervously.

"Sans ..." Grillby put down his towel on the chair next to him and started advancing slowly, while loosening his bowtie.

"Err ... Grillby?" Sans hesitated and took a step back. "Can you just forget what I said?"

"Sans!" Grillby looked offended and his flames rose higher as Sans started to perspire from the heat and his embarrassment.

"Wait! I take it back ... I'm sorry! I said it on impulse!" Sans stammered, "I didn't mean for you to take it in that way - it's not a confession, I'm just saying we - uhhh ... we're great buddies and I -"

"SANS!"

"AARGH!" Sans shot up to a stinging on his left cheek. Breathing heavily, he realised it was night time and he was in his room, sitting up on his bed. He noticed a dark outline sitting beside his legs and scrambled to the side to switch on the night light.

"Frisk?!" He stared at them in confusion as they stared sheepishly back.

"I'm sorry ..." Frisk whispered, "I was trying to wake you - did it hurt?"

Sans touched his left fingers to his cheek. The sting of the slap had gone; he guessed Frisk had tried to hold back. "Nah, kid. But you shouldn't be here at 1am in the morning. How did you get in?"

Frisk swung their leg over and hopped off the bed before pointing to the open window by the side of San's bed. "I climbed through the window."

Sans frowned. "Uhh. My bedroom is on the second floor. Are you trying to kill yourself?"

"Sorry ..."

He sighed, "Welp, no harm done I guess. What do you need, kiddo?"

Frisk looked away and twiddled their thumbs. After a slight pause, they looked at Sans with a serious expression, "I ... I want to save Asriel."

"Everybody does, kid -"

"But I actually mean it. I want to try!"

Sans was taken aback at the forcefulness of Frisk's tone but he regained composure. "Why the sudden desire?"

Frisk shuffled their feet from side to side and looked down, "I couldn't sleep very well at night. I kept seeing Asriel in my dreams ... He's so lonely, Sans. It's been 3 months ... but I still hear him calling out to me so ..." Their voice became even softer, "... I came up with a plan."

"C'mere, kid." Sans extended his arm and Frisk moved over to sit beside Sans on the bed. "You should have told us sooner. Does Toriel know?"

Frisk shook their head.

"And I suppose she doesn't know about this lil' midnight adventure, either." Sans chuckled as Frisk scratched their head sheepishly.

"Don't tell her."