I actually have a scheduel for writing set out lol I fail. I have so much Undertale stuff to work on! :D First...to this. This idea just kinda...popped up in my head and won't go away so I'm doing it! This is a before the game kinda fic, so...well you'll see.

Prologue

Rain fell iddly outside the dark window as Frisk sat on the couch. "I don't like rain that much..." She mumbled, watching the drops hit the pane.

"COME SMALL HUMAN!" Frisk turned to see Papyrus walking out, placing a book on the small table in the center of the living room. "LET US TRY AGAIN!"

"Ok!" Frisk climbed off the couch and stood a small distance from the book. "So...I need to just...focus on pushing it over?"

"YES!" Papyrus stood next to her and knelt down. "You can do this..." Frisk nodded and stared at the book. Her right eye began to pulse slightly, then glowed blue but the book remained still.

"Aww..." She huffed and tried again, with no results. "I can't do it." She plopped to the floor and folded her arms in a huff.

"SURE YOU CAN!" Papyrus turned to see Sans wandering downstairs, hands in the pockets of his blue hoodie. "SANS, LAZYBONES! GET OVER HERE AND HELP?!" Sans turned and Frisk tilted her head.

Is he ok? He looks a little...upset. She thought. "Sans?"

"Hmm? Oh yeah...still trying to lift that book eh?" He walked over and stood next to Frisk, taking her hand gently. "What, don't have enough 'spine'?"

"SANS!"

"Heehee..." Frisk turned and gripped her adoptive brother's hand tightly.

"So try again. Try imagine it's moving..." He said gently. Frisk's one eye glowed blue and green and it slowly began to float. Sans's left eye also glowed and it began to flap, almost like a bird. "There, see?"

"You helped!" Frisk pouted. Sans smiled and ruffled her brown hair and she shoved his playful hand away.

"What can I say? I have an 'eye' for helping out." He smiled briefly, but it fell away. "Sorry guys...I'm going for a bit, ok?" Frisk watched him go and she tugged at Papyrus's arm.

"Is he ok? He seemed real sad for some reason..." She said as he closed the door. The rain had stopped since then, the evening sun barely visible.

"Ah he will be. I forgot what day it is." He said and sighed. "..."

"Day?"

"Yeah. We...lost someone close to us several years ago, when we were all trapped in the Underground. Now that we're here on the surface again, it must be a little tougher this year." Frisk ran out after Sans and Papyrus just stood there. "Go ahead little human. Maybe you can help him."

Sans laid down in soft grass, gazing idly up at the stars. "Damn...is it really that time of year again? You lose track down there and now...nothing's stopping me from reminding myself." He chuckled softly.

"Sans?" Sans turned an eye to see Frisk walking up and laying next to him. Stars twinkled lazily down on them now and Sans turned back to look at them. "Are you ok? You look a little 'blue.' "

"Heh, nice one kid." Sans ruffled her hair again and she pouted. "I will be kiddo. Just...this day is always rough for me. Every year."

"Why? What happened? Paps said you lost someone..." Sans flinched and groaned, covering his face with his right arm. Frisk grabbed his hand and he peeked down at it. "C'mon Sans...please? I'm your little sister right?"

"Don't even play that card on me." He grumbled. When he was met with an unrelenting gaze he sighed. "Yeah...you're just like her."

"Her?"

"...Our dead sister from long ago." Frisk flinched a little and he smiled. "It's alright kiddo. I guess now is as good a time as any to tell it. You have a right to know after all." He sighed and felt Frisk scoot closer, nearly snuggling his side. "It was a long time ago...way longer than most can remember now."

"Old man."

"Oi, don't interrupt." Sans huffed as she giggled. "It was when I was your age...seven or eight. Back then things were different...it was when Paps and I...were stolen we met our sister...before we all fell to the ground below."

Prologue end

WOOOO! I hope you guys liked it so far! I promise things to get fun in the first official chapter! I know prologue is short, but hey, gotta start off somewhere!