Y/N's best friend Blueberry (also known as Underswap Sans) invited them to move into the shared/connected apartment next door. They could hang out all the time! It's an awesome opportunity and the chances of it happening again are slim. Being closer to friends means a lot, especially in this tough life on the surface. Blue has introduced Y/N to other Sanses before, and they've never had any issues with them. Even so, what happens when they find out that Blueberry now has a very creepy one as a roommate? His cracked-open skull and unclear motives for being here are a major concern. Still, it's not as freaky as the stranger's ghostly appearances and obnoxious actions. Blue says "he's just misunderstood." Should Y/N follow their conscience, warn Blue and run? Or listen to Blueberry's optimistic advice, and befriend their new neighbor? Hello! owo ... Undertale aus and art presented in this book are not mine. However, the story is 100% my work! I hope you enjoy it!

Want to talk about falling into the wrong place at the wrong time? Y/N definitely scored big time on that one. One moment she's falling, the next she finds herself trapped underground with a monster that wiped out his own kind. He's a cold-blooded killer that never shows any emotion. Though, as time passes, she finds out that Sans isn't as heartless as he plays himself to be. Hello! Writer~San here! Cover art and Undertale AU/Characters aren't mine, but the story definitely is. I hope you enjoy it!!!!

Line of Fate, a line that appears on the ground and will lead you to your 'soulmate' well yours leads you to a skeleton monster who rejects you flat out and flees the city once you confront him about it. After years of rejection you marry into an abusive relationship and your new neighbor just happens to be your true mate. How will this affect your marriage?

It has been 10 years since the monster broke free from the barrier, and since then monsters and humans live together in peace. But for some reason, monsters have somehow got a mini version of themselves, no one knows how or why it just happened. And for some reason, the skeleton bittys are popular because of their many different versions. You are a 19-year-old girl who lives in New York City in your apartment the problem is that you're all alone( if you're wondering if your family is alive, you just live far away from them), you have a small dislike for people. You wish you could get a Bitty to hang out with it, but the problem is that it costs a good amount of money. So you could never get one or so you thought until one day you find a strange box. This is my first time posting here so I hope you enjoy it! Also note there is some swearing. Note the cover does not belong to me. It came from https://undertale-au-fanon.fandom.com/wiki/Bitty!_Sanses By The Edit Lord Also I do not own any of the characters. Undertale belongs to Toby Fox.

Sometimes, you liked to imagine that Frisk was this kind and sweet because of you. That, maybe, you had lived up to your promise of being the best sister you could be when they were first born. ...That you taking the brunt force of your abusive parents was worth it. You had protected them from the reality of your family and... you knew that you had to protect them now. You were Determined... To stay Kind. .................... Arc 1 (Chapters 1-18), MAIN GAME: In which Frisk has an older sister (green!soul) that is, for some reason, aware of the resets. After going through a month of 'what if', she decides to follow Frisk on the journey. Arc 2 (Chapters 19-23), TRUE END: Though you were alive and breathing, you and Frisk had another challenge to face, this time with less blood and guts. Now came the true test- gossiping neighbors, new schools, and politics. Arc 3 (Chapters 24-41), EPILOGUE: You and your kid sibling, Frisk, freed monster kind over 10 years ago. Everything couldn't be more perfect and all you wanted to do was settle down. That is until you realize you can't remember the last 10 years of your life. Things go to chaos quickly as your memory and sanity start to slip. The only monster who seems able to help you is a man that no one can see or hear, but you. A man named W. D. Gaster. Arc 4 (chapters 42-??), PROLOGUE: You had traveled through the Underground with you kid sibling in tow to save monster-kind. 10 years later you did it again, albeit you were alone and the journey was scattered between the different alternate realities of your own to regain your missing memory. Now "home", you must pick up the pieces of your broken life, hopefully to piece them together to create a new one. While you're at it, you suppose you could help the wayward skeletons that had accidently followed you home from their universes.

Y/N wasn't anyone special. With 21 years under her belt, she went through life like anyone else. Until she was picked out from the rest. Read your way through the Underverse as Y/N gets into the worst of situations. Can she herself survive whilst also keeping those she deems her friends safe?