(Underfell sans x reader (female)) UNDERCOVER

Too many Feelings

         You weren't reading what Gaster had to say as he furiously writes and manages to throw a sock at you to get your attention.

[I have very limited vision in the Underground so you better tell me why you're acting all strange.]

         Gaster was becoming like a dad and has tried to set up rules for you to follow so you don't put yourself in danger.

"Calm down Gaster, it's nothing too serious."

[Serious or not, what did you do!?!]

You sighed and set yourself back on the bed.

"Sans asked me out on a date."

          You watch the previous message erase and see Gaster writing faster that you've ever seen him write. 

[You can't go, I won't let you.]

"Gaster you're not my dad. Sans is actually a nice monster and I think I can trust him."

[You think you can trust him!? If Sans finds out that you're a human he will turn you in to the royal guard, give you to king Asgore, and then he will give you to the royal scientist that will perform extremely painful experiments on you.] He finishes.

         You stayed quiet after reading Gaster's reply. You didn't want to believe that Sans would do something so heart breaking.

"How do you know that Sans would do that? You can't see the future."

[You're right, I can't see the future―but I do know that he will do something more 'merciful'.]

You didn't want to ask but you had to know.

"What exactly will he do that's considered 'merciful'?" I ask.

There was a pause before he began writing.

[Sans will kill you himself and give your soul to Asgore.]

Tears of anger were falling down your face.

"Sans wouldn't do that! You only have theories so you could be wrong!" I say angrily.

[I've known Sans longer than you have (your name), i've seen him mercy kill several humans. There were other humans that have fallen down here before you and he killed them all to give me their souls so I could find a way to use them to set all monsters free.]

"Stop it! I don't want to know anything else that you have!" I yell.

[That wasn't even the worse part...]

You wanted to rip your eyes away from the chalk board but your curiosity had taken control.

[...Those humans he killed...]

He was keeping the suspense to keep you scared.

[...Were children.]

         You snapped at this and threw your pillow at the chalk board causing it to fall down face first. You swore you could hear sickening laughter coming from Gaster himself, but you felt too angry and helpless as you curled up into a ball on the floor and covered your head with your arms and knees.

                                                      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

         It had been three hours since your fight with Gaster, you were still in your room just laying on the ground going through what Gaster had told you. You didn't want to believe that Sans had killed seven children for their souls. Every monster must be desperate to get out of here if they've all gotten to the point of taking innocent lives in hopes that it will free them from what they call Hell.