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(Y/N) and Sans have been best friends for who knows how long. Nothing could ever ruin their friendship... or could there be something? The human and monster war breaks out and the monsters are trapped underground, making Sans and (Y/N)'s friendship come apart. Years later, (Y/N) decides to hike up Mt. Ebott, where the monsters got trapped under, and falls down a hole. They end up seeing everyone they remember from when they were younger, but will THEY remember (Y/N). If they do, will they even protect her from the evil in the Underground, or will they let her die?

An Underfell fanfic. Can Frisk make it out of the Underground alive, and find what she was looking for? **COMPLETED 12/30/16**

When Frisk is sent to the underground, and being the pacifist they are,they won't hurt anybody...Or will they?Will the monsters be free from the barrier that the humans placed?Or will they be murdered in cold blood. The fate of the underground is in Frisk's hands now. (IM SO SORRY I SUCK AT DESCRIPTIONS and yeah. this is my first real book.) (And I'm the editor. *bows down* *falls off stage*) AYYY IMMA LET EM CURSE LIKE CRAP SHIT OH CHICKEN NUGGETS SWEET MOTHER OF CORN CHIPS OH UNICORN POOP YEAH AND NOT THOSE UM FUCK SHIT HELL HECK BITCH STUFF I TAKE IT BACK THEY CURSE SO MUCH IT'S BOOTIFUL

After All AU's of Frisk's death, all of the sans have been depressed losing their love/friend of their live. Until.........(Y/N) fell to the underground. As all of the sans met her, they soon realize how much she meant for them. As for (Y/N), she began to realize that all of the sans are starting to fall in love with her........ (WARNING: Curses and sadness if your sensitive to both or one of these dont read it or you'll get more sensitive XD ^^)

The Underground is prospering under the rule of Asriel and Frisk. But yet another human has fallen. what paths shall they take? How will they face the monsters? Will they slaughter them all, or will they help to defend them from a far greater threat? This is a continuation/sequel to my story "Shifted Love". I'd highly recommend you look at that one before this one so you can understand. WARNING! SHIPS AND OC'S GALORE!

Frisk has finished her adventure, and the barrier has been broken. Everyone has been happy for quite a few years. When they left the Underground, Frisk had no memory of her previous family, so she stayed with the monsters. One day, the barrier reactivates for no reason, all the monsters are sucked back underground. Except Frisk. A man claims to be her father, and now she must choose between the surface world and the underground. A/N I'm not really into 'Lemons' but naturally, I can't help but add a bit of sweetness and lemony stuff here and there, but I will not make anything TOOOOOO lemony. I want the sweet Cinnabon's to enjoy the story as well, without scaring them away. LARGER AUTHORS NOTE! I do not own undertale itself, but I do not believe anyone else has done this type of story before, BUT I COULD BE WRONG!!! I do not wish to directly copy anyone else's story, and I do not claim to be the creator of undertale (obviously) But I do claim the rights to this particular story! Not all the stories like this in general.

(Y/N)'s parents abuse her since she was the mistake in the family. MONSTERS has been released from the underground by Frisk. Frisk And (Y/N) go to the same college (Frisk is older in this). Little does (Y/N) know , she met someone who who cares for her. What will (Y/N) do??

After Ethan (Frisk's older brother) broke the barrier and set everyone free, they went on a huge trip around the world to spend more time together. Frisk had no time at all to talk to her friends and to top it all off she had lost her phone on the first plane ride. Her and Ethan decide it's a good idea to go back to where all of her friends live after over a year of traveling. Frisk was so excited to see her friends again. Especially Sans. Before she left they shared their first kiss and she said that they could work out a long distance relationship but it didn't work out since she had no way of talking to him. She just hopes that they can become closer after not seeing him for what felt like forever. Most of this story will be in Frisk's POV but I might change it around sometimes. Frisk and Sans are about the same age and Frisk is a girl. Chara will be in this sometimes but she's not a genocidal maniac. Also Asriel is in this as well and Flowey was never a thing. One more thing. This will have some curses in it so if you don't like that, don't read it. Anyways, enjoy!

Y/N is a suicidal person who fell into MT. EBOTT hoping to never wake up, a suicide attempt they fell into the underground and met Flowey and has carried him with throughout their journey. After sparing Toriel they met two skeletons one of them is.. Special.. His name is Sans he is the first person who has been nice to them in a long time. The other one is Papyrus the mean younger sibling. Sans and (Y/N) get closer throughout their time in the underground. Will they fall in love? How will everyone react? *Intended for a older audience!* *I do not own any characters in Underfell or Horrortale* *I do not own any music or pictures used in this book.* *Y/N is your character! Not mine! Do not take this book as a cry for help this is just fanfiction just for fun!* *I have changed (Y/N) to they/them cause I know some boys and people who don't identify as male or female might like Sans as well!* *(Y/N) is a short character around 4'0 and Sans is about 5'8 Papyrus is 7'6 you can change the height to whatever you wish* Istg ppl keep reading this as if it's not in the title, THIS BOOK IS NO LONGER CONTINUED. Thank you.