Sans was determined to keep the human from leaving the ruins.

He checked on them multiple times throughout the night, learning that they had eaten their hot pocket dinner before going back to sleep. He had woken up before them in the morning, preparing a day of fun to keep them there.

He knew it was kind of bad, tricking the human child into enjoying his house so they wouldn't leave. But he was desperate, he didn't want his brother to escape from the underground through violence. He just wanted to keep someone he cared about alive for once.

So, he planned out a whole day. He was going to make them breakfast, then he was going to play some bored games with them, eat lunch, then have them practice talking to monsters, let them explore a bit more while he talked to his friend behind the door, then tuck them in with a bed time story. He was going to ask his friend for more games, since he knew he couldn't keep them entertained forever with the few board games he had.

"Heya Kiddo," Sans said when she walked into the living room, "How was your sleeping?"

"It was good," Frisk said.

"Y'know, I'm the best sleeper around," Sans said, shutting his frog book he was reading, "I can do it with my eyes closed!"

Frisk giggled before walking up to him, rubbing her eyes tiredly. He then offered to make her breakfast, in which she accepted eagerly. He offered her a hot cat or a hot dog, in which she took a hot dog.

"This isn't what us humans usually eat for breakfast," Frisk told Sans with her mouth full. "It's usually a lunch thing."

"Eh, in the ruins, we can't be picky," Sans shrugged, "I could ask a friend on mine on the outside to bring you some cereal, if you'd like."

"There's more then the ruins?" Frisk asked him, "Can I ever go there?"

Sans froze before rapidly shaking his head, setting down his hot dog.

"Look, Kiddo," He explained, "As much as I want you to feel free and explore the underground, it's too dangerous for a human child like you. If you thought fighting the monsters in the ruins was hard, you won't survive out there. You'll be killed instantly, kiddo."

"What about you?" Frisk asked Sans, "Why are you here? Don't you want to live with your friend?"

"Because I want to protect humans, like you," Sans sighed sadly, "There were six humans before you, all of them I couldn't save. They all died to that horrible monster of a King, King Papyrus."

Sans spat out his brothers name, anger fuming inside of his soul. Frisk could see this, watching his eyes glow blue for a second before dimming to normal.

"You don't like him?" Frisk asked.

"I have a bone to pick with him," Sans said the pun naturally, "But to be serious, he's a cruel man who's set on killing every human who falls into the underground. He has a trained Royal Guard squad ready to kill any human at an instant. The ruins is the only place you'll be safe from him."

"Why are the ruins safe?" Frisk asked, "There's monsters here too."

"Yes, but they don't follow King Papyrus," Sans said, "Everyone here doesn't follow his rules, they just attacked you because they were scared of you. If any of them followed King Papyrus, I would've been ratted out years ago and brought to the castle. The King doesn't even know anyone is inside of the ruins, neither does most other monsters but a few."

"Are you a criminal?" Frisk asked, "Is that why you're on the run?"

"Oh, no kid, not that," Sans said, "Don't tell anyone this, but he's actually my little bro. I ran away because of the whole 'human killing' thing he enforced. I didn't like it, and he wouldn't listen to me, so I decided I would protect the fallen humans myself. So far, it hasn't gone so good..."

"Oh," Frisk said, looking down at her food, "I'll keep it a secret, but who would I tell?"

"I dunno, it's just in case," Sans said, "If any monster found out the runaway Prince was here, King Papyrus would drag me back to the castle kicking and screaming. And then he'd kill you and attack all of the humans with the power of a god."

"That wouldn't be good," The human said.

"No, so, kiddo, stay here and stay safe, please," The skeleton said, standing up, "How about we go play some board games and eat some lunch afterwards?"

"Sure," Frisk said, finishing her breakfast.

~~~~~~

"Yo Papyrus," Toriel said, walking into the throne room.

"Toriel, what brings you here today?" Papyrus asked her, perking up in his throne room.

"I wanna help you find your bro," Toriel offered.

"Why?" Papyrus asked.

"Well, it's pretty simple, actually," She said, "You said you looked like seven times, but that was some time ago. He might've lowered his defenses, or we might get lucky and find his hide out. Who knows, I want to help you find him, I couldn't imagine what it would feel like separated from Asgore, so I think I should help."

Papyrus thought it over for a moment before saying, "Thank you, that would be great. I already looked over all of the underground, and you should still work at your job, so I think you should only look for an hour, maybe two. But have Undyne plan it out, I'm sure she'd enjoy that."

"She would," Toriel agreed, "Thanks for letting me do this, Papyrus. I really hope we find him."

"Thank you, too," Papyrus said, "This gives me hope for the future."

"See ya," Toriel said, bowing slightly before walking off.

~~~~~~

Undyne had gathered all of the Royal Guard and separated them into small teams of four. She even brought in Alphys and Asgore.

"Okay guys, here are the places you'll be searching!" Undyne said, spreading out a map with circles on it of all the underground, "Even with our separate groups it'll be difficult to inspect all of the underground in one day. So, we're going to start on the edges of it and close in, so perhaps we could trap him. And, unless absolutely necessary, do NOT attack him. He is royalty and no harm should come to the Prince. Is that clear!"

"Yes ma'am!" Everyone in the room said.

"Alright," Undyne said, resting spear on her shoulder, "Now, I know it's been awhile since we've looked for Prince Sans, but remember that he is a master at hiding and you probably won't spot him on your first look. That's why we have teams, so we can check with the eye sight of at least four people. Also, he is powerful, and might attack. Just to use binding magic to tie him up if that's so, don't attack back. Is that also clear?"

"Yes ma'am!" They all repeated.

"Good!" Undyne said, "Now let's go return our Prince home!"

Everyone cheered before running off with their groups, leaving behind Undyne, Asgore, Alphys, and Toriel.

"This was a great idea, sister!" Asgore said, patting Toriel's shoulder, "The awesome Asgore is proud of you!"

"Y-Yeah, this was a-a good idea," Alphys said, adjusting her glasses, "Papyrus' spirit s-seems pretty down l-lately and this s-should h-help!"

"Yeah, he seemed pretty depressed," Toriel said, shrugging, "I just decided to do it to help him."

"Nice job punk!" Undyne yelled, hitting her shoulder playfully, "We got Snowdin, since you guys know your way 'round it. Let's go!"

They quickly made their way to Snowdin using the riverman, listening to him say "Tra-la-la" a few times before they arrived. They inspected him before determining he wasn't a skeleton but a normal monster before moving onto their respective part of Snowdin.

"No secrets here!" Asgore yelled, dropping the snow puff back onto the ground.

"Nothing here either," Undyne said, checking behind a tree.

"Hey, what about your new friend?" Asgore asked his sister, "Does he have any leads on where the Prince could be?"

"Probably not," Toriel said, "He knows his place inside out, he said it's pretty small and that he's the only monster there."

"Oh, okay," Alphys sighed before pointing in a direction, "We c-can go look over t-there n-next."