Your name is (y/n) (l/n). You live with your crazy twin light (l/n). You became very overprotective after your parents and older brother died. You live in a mansion and one day you were looking for a high school and lowered it down to Under high.

Your name is (Y/n) you have no idea of your past all you know is that your "dad" is W.D. Gaster and your "brothers" are Gaster Sans or Gasts/G and Cross Chara and your "mom" is Arial. You have to go into a new school called Underhigh. Your life was fine and you were happy with that. Through your days in going to Underhigh some people fell in love with you. And you so happen to you-know-what. Your past how ever, has something to do with why your here with them. But when you see "HER" your PAST will finaly unfold. Your story. Your life. Your "REAL FAMILY". Your life unfolds, while you have romance. How will it turn out? Read and find out! Also this is my first x reader book Hope you all enjoy!

~Completed~ You are a four year old. Your mother and father always worked and always had to get you a babysitter but they didn't want you to be inside the house all the time so they had a brilliant idea. To take you to a daycare! Paperjam's Daycare to be exact. I wonder what happens when there's a human child around.

(Y/n) goes to Mt. Ebbot in search of her brother Frisk. But what she finds instead amazes her.

After decades of being sealed underground, monsters have returned to the surface world. However, you can't help but feel that they are hiding something. What happened to Chara, the first human said to have fallen into the underground? Curiously, you journey to Mt. Ebott, only to encounter something you never thought you'd see. Or someone: Chara. Chara is referred to as (they/them). Reader is referred to as either male or female, identified as (he/she). Rating: PG 14+ for (little) explicit language, violence and fantasy violence, and suggestive/sexual themes. Last edited 03/19/19, on indefinite hiatus. Thank you for reading. ♡

☆ (Y/N) was just a regular girl living in a regular town. Well, maybe she wasn't the most normal girl, but she usually acted like she was. But then, one day, a new student came to her highschool. (Y/N) thought that they'd probably be pretty good friends, because he seemed like he wasn't normal either; but what (Y/N) didn't expect, was that they would ever be M o r e T h a n F r i e n d s ☆

well I was bored, and I love Undertale so it kinda makes sense.

Sans has lived through countless timelines. He's seen the kid make friends with everyone, only to give up in the final moments. He's seen the kid killed, over and over and over again. Sometimes, he'd even done the killing himself. And no one ever remembers. Not even the kid herself. It's an exhausting cycle, one that never seems to end. But there's something different about this run. Another human's fallen down... the kid's sister.

Noticed that there weren't that many of these types of stories. So why not? When Mettaton comes over to visit, you find it difficult to decide weather you like him or you just see him as a normal monster. With all the changes happening around you, you find it difficult to decide anything.