Summary: Challenger sighted-

Sans nervously stood at the edge of the barrier's cave, unmoving as his fellow monsters (Papyrus, Undyne, Alphys, Toriel, and Asgore) and Frisk stepped out of the mountainous prison and into the vast open Surface beneath a dark star-laden sky.

The short skeleton had dreamed of this moment for so long. So long, in fact, he even gave up on ever seeing it come true. Yet here it was: the Surface, their freedom.

The end of the Resets.

Part of him still expected this moment to slip right through his phalanges- for the other shoe to drop. For something to - inevitably - go horribly wrong.

So he remained rooted in place, staring as his brother and the others crowed in joy.

Of course, like the cool dude he was, Papyrus noticed the lack of a short skeleton by his side.

The lanky monster turned around and shouted, "Brother, what are you doing? Come enjoy the very fresh and cool Surface air! Stars knows it would do that foul coat of yours some good to collect a scent other than ketchup and socks."

"Sure, bro." Sans casually replied, revealing not an ounce of the turmoil twisting his soul.

His slippers hesitantly shuffled over the threshold. Chilly mountain air instantly brushed against his bones, causing him to shiver and pull his hoodie tighter around him. All the while, his eyelights flitted over every conceivable surface - no pun intended - in sight: the mountain rocks, the trees, the city on the skyline- finally landing on the sky.

Stars - billions and billions of shimmering white specks - adorned the night. Sans couldn't help but compare them to the glowing rocks littered atop the ceiling of Waterfall. They were smaller, brighter- more than a stone for childish wishes to be made on.

And at the center laid a brilliant white orb that dwarfed them all: the moon.

He gazed upward in awe, then stepped forward-

Sans blinked.

No longer was he underneath an amaranthine sky filled with sparkling lights. Instead, he was lying down in his bed and looking up at his old bedroom ceiling back in Snowdin.

Back in the Underground.

With the moon and stars out of reach.

Sans groaned and buried his face in his hands, howling, "I SHOULD HAVE DESTROYED YOU WHEN I HAD THE CHANCE!"

He jolted at a sudden loud knock on his bedroom door followed by a concerned, "Brother, what are you screaming about?!"