W.D. Gaster studies love. He studies his test subjects then kills them. But here's the question. Will he kill you? Or will you forever be in his heart?

its all about (Y/n) relationship as Best friend's they've been friends sins kids until ther grew up as Adults They made a promis many years ago that they'll protect ech other and all weys stick together Better or worst By Plus they dont know they have a Crush at ech other But when gaster made sans and papyrus Gaster only goes home's time to time And stop talking to (Y/n) Its like gaster forgotten the girl who stayed By his side for years (y/n) was heart Broken and she wants to know What gaster was Doing and saves sans and papyrus But (Y/n) turnd her Back against gaster But after 3 months gaster will ask for forgiveness (Y/n) will all so forgive him giving him a second chans.

You've always have had a creepy smile, and it doesn't help that you have these scars on your face now.... It doesn't matter though, you're fine with it, and he's happy too... Simple Gaster X Reader fic, I hope everyone enjoys!

Love W.D. Gaster ? Then u are ready for a lovely adventure to begin my friend ! Please read on !

this is my first time so hope you all can enjoy

You're a human girl, living on the surface with Frisk, who is your younger sibling. You one day find two children, who's been chased away from neighborhood to neighborhood. And with you're kind soul, you couldn't leave them to live in the streets. You take them in, and meet their father. But will one day, lose them, because of a war. There is some ErrorBerry, and PaperFresh in this too.

Dark, darker, yet darker. The darkness keeps growing in your life. You don't know why, but there's someone relentlessly haunting you. He won't leave you alone, and every dream you have is a nightmare. It seems peace is currently impossible for you. What great evil could possibly want to harm you? You never felt that you had done any evil unto anyone else...if anything, you felt like your life was just a long list of things you'd never done. Was your insecurity in itself a sin? Don't jump to conclusions so fast, you poor, tortured soul. Harm may not be what this force wants to inflict after all. It may just be a distorted cry for help. In this post-pacifist route story, get support from well beloved characters as well as new ones, and delve deep into your curiosities and sympathies for one of Undertale's most mysterious characters. Dive in an reap the fruit of the void! Also on my Deviantart! http://rechtbrecher75.deviantart.com/gallery/60771559/Fruit-of-the-Void-Gaster-x-Reader

COMPLETE!!! This story is in the past! It plays off the idea that sans and papyrus are Gaster's kids. Being the past it means that his kids aren't born/created yet. Also monster kid, Frisk, Chara, and Asriel aren't born/created

You lost your father in the war against the monsters. If it was up to you every last being that fought against man would be sent to execution. But it wasn't your choice.... unless it was? That's when you decide to visit the underground. All you needed was one excuse to rage another war against the monsters this time without showing mercy. But what you didn't expect was HIM. The monster that gave made you question your own methods. The monster that didn't treat you like a freak. The monster that gave you the only aspect you lacked.... HOPE.