Hello citizens of the Underground! As you can probably tell, I'm going to be writing a Undertale/Supernatural crossover! WOAH! WHY SO MANY NEW STORIES? Because I'm trash, that's why. Anyway, here's my newest story. I hope you love it. Check out some of my other stories if you'd like. Also, this is set shortly after the last episode of season 1 ^.^ BBY SAM AND DEAN! Sorry, got excited, you know. Anyways, Thanks and Enjoy.

Mt. Ebbott - Present Day

Sam looked over the edge of Mt. Ebbott, staring into the deep abyss.

"Dean, anyone who goes down there never comes back."

His brother patted his back as he walked up behind him. Dean stood, looking down with his brother, his confidence in them beginning to show.

"Oh, come on, Sammy! Since when have we been scared of a little adventure? Besides, I got a call saying a kid fell down here about a day and a half ago. You think they survived it?" Dean ended his question with a quick glance at Sam as he grabbed a pile of rope from near a tree and began to tie it up.

Sam shook his head, turning to help his brother, but tripping as he did so.

"Dean!"

He shouted as he felt the unfamiliar weightlessness of falling, hearing Dean go down behind him. He was sure he was going to die, and his last thought was of Dean before he hit the ground.

Hours Later

His head was thumping, and someone rocked his shoulder. "Sammy? Oh God, Sammy. Wake up!"

Sam blinked, slowly opening his eyes in the light from the hole from above.

"We lived?"

Dean nodded, helping his brother up. They gave each other a look, knowing that they should explore the place together. They followed a narrow tunnel to a large entryway.

"Howdy, I'm Flowey! Flowey the Flower!"

Dean and Sam stared at each other in equal horror as a flower sprung from the ground out of nowhere. His petals were yellow, surrounding a white center. He wore a big grin on his face, which Dean wanted nothing to do with.

"Um, hey there. We're a bit lost. W-what...? Where are we?" Sam questioned.

Dean shot him a look, "Dude, don't talk to that thing!"

Sam shrugged as Flowey continued on.

"You're new to the Underground, aren'tcha?"

Sam and Dean gave each other a final look before deciding to play along.

"Sure...I guess. Is that where we are?"

"Sure is! You two must be pretty confused. Someone ought to teach you boys how things work around here. I guess little old me will have to do."

Dean and Sam felt themselves be lifted from the ground, two heart shapes floating in front of them. Sam's was a bright, red heart and Dean's shown orange in front of them.

"These are your SOULS, the very culmination of your beings," Flowey's voice squeaked cheerfully.

Dean cut in, "Hey, could you put us the hell down? I don't like my soul being messed with, buddy."

Flowey shot him a harsh look, before continuing as if nothing had happened. "Your soul starts out weak, but grows stronger if you gain LV. That stands for LOVE." He gave a little wink before continuing. "Down here love is spread through little...white...FRIENDLINESS PELLETS!"

Dean's face contorted showing his disgust for the cheer and gross, fake smile plastered on the flower's face.

Dean began to shout, "Cut the crap, pipsqueak. I ain't going anywhere near your damn 'friendliness pellets'Now put me the hell down or I swear to Go-"

Out of nowhere a ball of fire struck the flower, sending him flying into the darkness.

"Hello, my...children? You don't look very young."