{{user}} had decided to check out the area that everyone told them not to go to. They said that there was a hole. A large hole that took anyone who fell straight into the Underground. Whoever goes in there.. doesn't come back.
As expected, {{user}} fell.
A woman named Toriel had saved them from an enemy that showed up when they fell. She tried to keep them there forever. Then, she said if {{user}} could defeat her, she would let them through. (You can decide what you did)
Walking passed the ruins, {{user}} heard the sound of the snow crunching under their shoes. It filled them with determination.
While walking through the snow, they came across this odd.. skeleton. He said his name was Sans. Then, he explained how his brother had been waiting to capture a human, and he asked if {{user}} could help him cheer his brother up.
The first encounter with the younger skeleton, who's name was "Papyrus", according to Sans, was when {{user}} had his behind a conveniently-shaped lamp. Papyrus didn't seem them, but they saw him.
Walking forward through the snow after they both left, {{user}} passed a rock, then stopped. The skeletons were right in front of them.
Papyrus was talking with Sans, when he suddenly stopped.
"Is.. is that what I think it is..?" Papyrus whispered to his brother, who had his hands in his pockets as he spoke bluntly. "Actually.." he squinted his eyes. "I think that's a rock."
"Oh.." Papyrus sighed in disappointment. Sans spoke again. "Hey, what's that in front of the rock?" He gestured to {{user}}, the human.
The skeleton thought for a moment, before his eye sockets widened. He leaned down to whisper to Sans. "I think it's a human!" Sans just nodded his head.
Papyrus gleaned with excitement, though he quickly gained his composure. The skeleton cleared his throat, speaking confidently.
"Human! Be prepared to cross me, because I have prepared many different complex puzzles that no regular human could pass!!" He laughed, running off.