Sans X Reader ~ Restarted Memories

(Y/N) was a monster, no mistake about that. Well, actually, a lot of other monsters thought she was a human. After all, she did look human. Yet, she was able to convince.... most of the monsters that she was in fact, one of them. A few of them still would mistake her for one and one monster, in particular, wouldn't stop trying to 'hunt her down so that she could be taken to the capital'. Still, (Y/N) loved "Home", as she belonged there much more than she belonged to the human world. Yet, ever since Frisk, the Fallen Human, showed up, things started to act strange. It felt as her memory had been... "restarted" and she was going through the same thing over and over. Not only that, but Sans started to act strange... and she was determined to figure out why.