No Rest for the Wicked (Fell!Sans x Feral!Reader)

y/n was raised in the wild away from humans. once the monsters were freed by a girl named frisk, life in the woods got harder. she had to move into the city. that's when she meets Sans, or as she sometimes calls him "Fell"! the skeleton quickly bonded to her, and calls her "Ally Cat" due to her nature and where he met her. of course, have a pet like human in a human world is dangerous, essentially when humans are trying to get rid of the monsters faster than they came! will Ally Cat and Fell get threw it? read to find out!

(The cat in the cover is not mine, it just fits the story)