The Test Subject (Sans X Reader)

Chapter 1: The Train Station

"SANS CAN YOU PLEASE PICK UP YOUR SOCK!"

"sure thing papy." Sans replied as he was laying on the couch. This was normal conversation for Sans and Papyrus.

Papyrus would be making spaghetti and he'd yell at Sans for still not picking up his sock.

Papyrus has gotten better at making spaghetti, though Sans will never tell Papy his cooking wasn't edible Before.

*buzz*

Sans groaned and reached for his phone after hearing it go off.

(Anonymous)- Hey Sans! I know you won't recognize this number, but meet me at Ebott Station.
I'll be getting off soon. Hope to see you there.

Sans paused, looking at the message on his phone. Thinking of what to say or even if he should go to the station.

                                            K'. I'll see ya there- Sans

He answered the text and got up to put on his blue jacket.

"hey, Papy. I'll be back."

"OKAY! BEFORE YOU GO DID YOU PICK UO YOUR SOCK?"

Sans chuckled and snapped his fingers, not answer Papyrus. He knew when he got back Papyrus wasn't gonna be very happy with him.

He was outside of Ebott Station, he was waiting there for what felt like forever but in short was only 30 minutes.

He watched the train doors open and someone he actually recognized walk out with someone right being them. (I'm going to refer to Y/N as she, please feel free to correct it to Him/they if you choose to.)

"frisk? Kiddo is that you?"

"Sans! You actually came!"

Frisk ran towards Sans hugging him. Sans was at a lost for words, Frisk disappeared for two years and now she is suddenly hugging him. He looked behind frisk to see a very shy girl waking towards them.

"so kiddo, who is this?" Sans asked slowly pulling Frisk off of him.

"Oh! This is (Y/N)!" Frisk said happily.

"Uh... hello. It's nice to meet you Sans. Frisk had been talking about you guys a lot." (Y/N) said as she put her hand out.

Sans felt his smile grow and He grabbed her hand only for (Y/N) pull her hand away and start laughing. Even with all that laughing, Sans could tell there was something off about her.

"so kiddo, mind telling me why you ran off?" Sans asked, trying to distract himself from jumping to conclusions.

Frisk paused clearly at a loss to even explain why she left and was suddenly back.

"No much for talking again?" Sans teased, "Come on, Papyrus is making spaghetti. He'd be happy to see you again."  Sans held out his hands to both humans, Frisk let out a chuckle and the new girl only watched the scene before her.

With a snap of Sans fingers, they were inside the living room.

"SANS! YOU STILL HAVEN-" Papyrus froze as he stared in awe at Frisk and the new human before him.

He rushed over pulling them both into a bear hug, "HUMANS! FRISK! WHERE HAVE YOU BEEN?!" He said, you could hear the sadness and joy from it.

"Easy there papy, you make it seem like you got a bone to pick with Frisk there."

Papyrus froze when he heard the pin his brother used. He slowly put the girls down and let a groan. Clearly too tired to even give Sans a response.

"FRISK! NEW HUMAN! COME HELP ME FINSIH MY FAMOUS SPAGHETTI!" He yelled happily pulling them both by their hands.

Frisk was laughing while (Y/N) just smiled, you could tell she was nervous about everything happening.

Sans went right back to sleep on the couch, catching up on the minutes he missed out when meeting up Frisk.

"Papyrus! Wait let me help with the sauce." Frisk begged, as she wanted the meal to be edible for (Y/N).

"NOT TO WORRY HUMAN, EVERYTHING IS GOING ACCORD TO PLAN!" Papyrus says while crushing tomatoes.

(Y/N) froze when she say this, her eyes eye she started to breathe heavily. Putting a hand to her chest she fell down to her knees.

Frisk noticed and instantly rushed to her said.

"Hey! (Y/N) it's okay, you're not there anymore, you're safe." She kept repeating while holding the shaking girl. Papyrus was at a loss to do, he tried to comfort the new human the best he could.

"Please.. don't test on me again.." (Y/N) whisper before passing out in Frisk and Papyrus's arms.