The word "shit" is not just a curse word. Sometimes, it imposes its presence and repeats itself, carves itself in the brain and bounces off the skull's walls like a frog under steroids until it becomes an emotions. And at the very moment, this was the case for Sans. "Shit" was his emotion at the moment.

His butt on the carpet, still holding the empty blanket, he could barely hear his brother's remonstrance. His barely awake mind was vainly trying to analyze the situation under the yelling and the "shitshitshitshit" resonating in the background of his skull. How much time had he been sleeping? Where was Frisk?

"Say, you're home early, Paps," he said as if nothing happened.

"WHAT are you TALKING ABOUT, SANS?! I've been LOOKING FOR YOU, ALL DAY, AND I FOUND YOU SLEEPING on the COUCH! And you can't even do THAT CORRECTLY! You are supposed to COVER YOURSELF with the blanket, NOT HUG IT!" kept yelling a very exasperated Papyrus.

All day. It was already the evening? That explained why he was home. Where was Toriel? Had she come to pick up Frisk? Yes, maybe… No, she would have taken the blanket, or would have at least woken him up to say goodbye. Right? She wouldn't have tricked him like this!

Noticing his brother's pensive silence, Papyrus finally stopped lecturing him, which the smaller of the two skeletons didn't seem to notice immediately. His eye sockets were dark, empty. "Sans?" No answer. "SANS!"

Said man jumped, suddenly torn away from his interrogations. "Uh, yeah bro?"

"It appears that you are not listening to my lecture and you seem… more worried? Than usual. What is the matter?"

Sans thanked haven that his huge smile was his only expression and quickly tried to reassure his brother. "Uh, you got me bro. You really can see right through me."

"Sans, I'm serious!"

"I know, I know, but I was thinking maybe the ghosts need that matter more than I do."

Papyrus crossed his arms, annoyed but comforted by his brother's puns. "Well, I elect to believe you FOR THE TIME BEING, brother. And do not go thinking I forgot about you SKIPPING WORK today! We'll talk about it later! For now, the Great Papyrus is going to cook diner!"

"Ok bro, whatev…" Sans suddenly stopped as he realized something. He jumped back on his feet, throwing the blanket on the couch, and rushed to the kitchen door. "No, wait! Let me check first!"

"And why should I do this, brother?"

"Uh," Sans thought as his eyes inspected the kitchen frenetically. He didn't know if Frisk could already walk, or crawl. Maybe she had woken up before him and had decided to take a walk alone around the house. He couldn't risk Papyrus seeing her. "I saw a mouse, this morning."

"A mouse?"

"Yeah. Uh, a very big mouse." He scanned the room a bit more and listened carefully but everything seemed in order, no sign of the tiny human. "Okay, it's not there, you can go."

"You are acting very strangely, Sans. Are you sure you are alright?" Asked Papyrus as he walked past him. "Do not worry about the mouse. If I, the great Papyrus, found it in the kitchen, I will have no trouble capturing it like a meek human!"

"Right, right. Well, excuse me but I'm going to my room." Papyrus grumbled but didn't say anything, much to Sans's relief as he casually exited the kitchen. As soon as he was out of sight, he started searching the living room, hoping Frisk was simply hiding behind the couch or the TV. Nothing.

He teleported to the second level. Maybe she had managed to climb the stairs. His room was closed, as usual, no risk here, but Papyrus's was slightly open. He went in without a sound, searched the bed, the furniture, the closet, he even emptied the box full of bones his brother was keeping for combat. Nothing.

He walked back in the corridor and put his skull between his phalanges, kind of stressed. Toriel was going to destroy him. It was that simple. How was he going to tell her he managed to lose a baby in a house with only four rooms? No, he had looked everywhere, Frisk wasn't here anymore. But then where? And how was she gone? Because if she wasn't inside she was bound to be outside, right?

"SANS!" The little skeleton jumped when he heard his brother calling his name from the kitchen. "THE GREAT PAPYRUS REQUIERS YOUR HELP!" Oh no, he couldn't stay and help his brother cook diner, not now. He had enough catastrophes upon his shoulders.

"Sorry bro, gotta go do something."

"SANS?" he didn't give his brother enough time to ask him questions. He snapped himself outside the house. He ran a hand on his forehead. All this drama was tiring him.

Alright, better go to Snowdin's shop. Maybe Toriel was still there? He was going to teleport again but didn't need to as he spotted, just in time, the goat-lady walking the street towards him, her cape on her head.

He didn't even need to call her name, she saw him from afar and walked right to him, looking rather pleased. "Good evening, Sans! I am so very sorry I took so long. I let myself talk with Hoppy while I searched her shelves and we didn't see the time go, however she does know excellent pastry recipes! It turns out she didn't have any emetic but she sent me to her sister, Inny, who works at the inn and who has children. She gave me a home-made remedy which should help Frisk…" Toriel suddenly paused, noticing the sorry look in the skeleton's eyes, and more importantly Frisk's absence. Her tone was suddenly much harder, almost strict. "Sans, where is Frisk?"

Sans had to control himself not to fly from the goat mother's contained rage. Just in case, he prepared himself to dodge. "I'm sorry, Toriel. Frisk has disappeared."