This was it. The final reset.
No more playing around, Frisk decided. They'd explored every nook and cranny in the vast (but ultimately finite) Underground. They'd talked and talked every monster half to death- and sometimes completely there. They'd taken every possible turn, done every possible thing. And now here they were, with their perfect ending. Everyone happy. Even Flowey, to the greatest extent he could be. Everyone safe. Everyone satisfied. Like a veritable final Groundhog's Day.
They looked in the mirror Toriel had included in their new room. This meant no more fights. That was okay with them. They hated fighting anyway. It meant no more saying whatever came to mind. They'd have to speak carefully from now on. But heck, who wanted to live everything over that many times? It was exciting to have an uncertain future for once.
Half-stumbling down the stairs(they'd fought Sans for crying out loud, how were they still this clumsy), they smelled pie baking in the kitchen and their stomach grumbled. One of the many perks to living with Toriel was a never-ending supply of food, and really good food at that. It was already shaping up to be a fantastic new day.
Frisk didn't think to share their new resolution. Nobody else knew they could reset, after all. And now that it was over, there was no reason to divulge the information. They'd tried that once, and it'd gotten them institutionalized. Toriel, sweet lady she was, did not have an open mind about time travel enacted by eight year old children. Although Frisk could hardly blame her- it did sound absolutely insane.
Sometimes Frisk wondered if they were insane after all.
Sometimes they wondered if they were in some strange form of afterlife, if they had died at the bottom of Mount Ebbot as they'd originally intended.
"Frisk, you're up quite early for a Saturday morning," Toriel greeted them warmly, a fresh pie steaming in her hands like a beacon of delicious.
"The sun woke me up," they replied with a grin, accepting a slice.
"Oh dear, would you like me to put up curtains for you?" The goat woman asked, and they shook their head.
"I like it," they said. "It's a nice change from the Underground, wouldn't you say?" They looked out the kitchen window. It was a beautiful day. Birds were singing, flowers were blooming...
"I suppose so," she laughed. Frisk couldn't help but laugh too, if not for the glow surrounding the morning then for the fact that Toriel's laughter was hilariously speckled with involuntary bleating.
If only they knew that just two doors down, a certain skeleton was remembering far more than he wished to. If only they knew that each morning, he woke up and fell apart inside a little more under the crushing wait of a reset never to come. If only they could see him, shaking and sobbing as they ate pie with Toriel at the breakfast table.
If only they knew what he was planning.