Chilled (Yandere Sans x Reader)

F/N fell down. Down, down, down the dark hole on Mt. Ebott to find a chilling world of monsters where she meets a creepy flower, a loving goat mom, and... Sans. He claims that nothing in life matters, but she just doesn't believe that. No matter what he says about nothing mattering, she thinks that the world is still worth living in and saving. So she tries to create a better vision for him, but little does she know, the results of her words take an unexpectedly chilling turn.

(Beautiful cover art not made by me.)