Nuttopia

Adoption Day 10

Sans couldn't remember the last time he actually slept. Not the cat-napping he usually did when weariness caught up with him and bludgeoned watchful wariness with a sneak attack. Not the kind of sleep he got back in the bad place, where he fell unconscious from pain, or when he had his senses open for any sign of His approach. But this time... right after Toriel tucked them both in to their shared bed, he fell deep down into sleep so pure that he actually felt... rested.

Something had unlocked. Not anywhere physical, just... within himself.

Sans opened his eyes. Same friendly ceiling. Same soft bed. Same collection of toys and... same best brother ever, waiting for him and practicing his blue magic on a particularly light teddy bear.

"Finally," said Papyrus. "I thought you would be napping forever, brother. Miss Toriel Ma'am has been keeping breakfast warm for hours."

Sans dragged himself out of bed. He felt a lot better than he had since... since he couldn't remember. How was it that getting a full night's sleep was exhausting? He shuffled into the googly-eye slippers and made his way to the dining room. "...thanks for waiting for me," he mumbled. "...dunno why i'm so tired, i actually got to sleep."

Toriel was impressed by something. Scooped him up in a hug and danced with him. Laughing all the time and congratulating him.

It took four tries at understanding her before she spelled it out:

A good sleep can raise someone's HP above their usual limits.

And now all he wanted to do was sleep. That, and eat. He was starving.