Knock Knock {A Sans X Reader - Undertale} - Cuddles the Alpaca - Wattpad

Story cover for Knock Knock {A Sans X Reader - Undertale} by LittleFluffyAlpaca

Knock Knock {A Sans X Reader - Undertale}

LittleFluffyAlpaca

Reads 268,725
Votes 7,890
Parts 19
Time 1h 48m

Reads 268,725
Votes 7,890
Parts 19
Time 1h 48m

LittleFluffyAlpaca

alphys asgore fandoms goatmom megalovania metatton papyrus puns sans sansxreader temmie toriel undertale undertalefandom undertalexreader undyne xreader

You were always a curious child. One day, your curiosity took you too far. You lived not to far from a mountain, MT. Ebott, and always wanted to see what was on the top. Your parents had told you stories about the mountain and you had always wanted to see if they were true, being the naïve child you were.

One day, you reached the top after a while of climbing. You looked around, not realising where you were walking and fell into a gaping black hole. 

You woke up to a soft voice of a goat-like monster who, ever since that moment, took care of you and loved you. She taught you magic and all sorts of recipes. Everything she knew and you loved it. 

But what happens when you grow up more?All Rights Reserved

alphys asgore fandoms goatmom megalovania metatton papyrus puns sans sansxreader temmie toriel undertale undertalefandom undertalexreader undyne xreader

Table of contents

19 parts

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Ms. Teach (Sans x Reader) by reizou-kun

Y/n is a music teacher, known for making music, and/or covering music and songs. Now, your working days at school are over, and decided to take a trip with your friends to a famous mountain, namely Mt. Ebott. That night, while everyone is sleeping, excluding you, you found a girl taking a walk on the mountain. Trailing her steps, you caught her jumping off. You hopped in after her, in hopes of her to survive the fall... And now you realized, it was your long lost little sister! Now things are gonna get awry. But still, You're filled with... no, not DETERMINATION... But... with TRUST. == + == + == Story: Finished ✅ *Bonus Chapters* 2 of them are DISCONTINUED (3/5)

A Tree, For Us (Sans X Reader) by TheAbandonedQuiche

CONTAINS SPOILERS FROM BOTH PACIFIST AND GENOCIDE RUNS After a horrible situation, I (Y/N) scaped from home to avenge my (sibling). In a failed attempt, I got lost and fell through a hole, in there I found another world... "the underground". I meet many friendly monsters, one, specifically, changed my whole life. Both of us will try to give the monsters the liberty they deserve. And this is how all happened... (Cover made by me :3)

A Strange Feeling (Sans X Reader) by Sak423

Do not expect consistent updates as life gets busy 🙃. This is rated mature because of strong language. You are a 24 year-old in college and have loved Undertale since the beginning. You enjoy all the aspects of the game; the story, the lore, the music, the backgrounds, and most importantly the characters. You've started having a strange, almost malicious feeling related to the Genocide run and that creeps you out. So, you start a pacifist run and after a while, you fall asleep. You wake up in Undertale and thus begin your new journey. Through your travels, the strange feeling comes back, but as a different emotion. Perhaps the only one that can help you with this feeling, is a certain punny skeleton. (I tried my best I'm not very good at summaries 🥲.) (Also I am so sorry for the kinda weird writing this is my first time writing a story. So I welcome constructive criticism.) Started: January 26, 2025 Ended: ???

Daybreak [ Error!Sans x Reader ] by morrow-

Gone. In a single moment, in the blink of an eye, everything you have ever known or cared for is eradicated. Hopes and dreams, traditions and stories that date back centuries have been erased without thought or care. Nothing matters and no one will ever live again to pass on the memories and stories of what was lost. Except you. You are the anomaly, the glitch that survived when all else could not. When your universe was destroyed, you found yourself stranded, alone, afraid in a white world without end. But there's little time to rest when you discover that your universe was merely a grain of sand on a much bigger ocean. Whole other worlds thrive in different plains of existence, and they're all going to war. In a desperate power-struggle for the upper hand, you find yourself an unlikely ally. The future seems certain, chaos will win and the universe will be plunged forever into violence and bloodshed. And it will take a lot more than a miracle to win.

Goodnight, Kiddo... (Adopted by Sans! Reader Fanfic) by TheShortSensei

You are an orphan, abandoned by your parents at birth. You've lived between countless foster families and a dreaded girl's home for as long as you can remember, because nobody chose to adopt you. Now, you are fifteen years old, and you decide to run away. Monsters have been living on the surface come four years now. What could become of this new adventure? Heyyyyyy! TheShortSensei here! I strongly suggest reading my former Undertale x reader book, When Spaghetti is your Life, before looking at this one. This book is a continuation of that one, so there may be spoilers if this one is read first! I will probably be using female-based pronouns, but I don't want it to be so gender based. Have fun, guys! Thank you for choosing to read this trash. Please comment and tell me what you think! P.S. If you're still reading, you get an invisible gold star sticker from yours truly. Well, what are you waiting for? I already gave you that sticker, didn't I??

Sans X Reader // You're Too Punny by MySmolChemicalBean

Smol thing I guess. I don't own Undertale (obviously), but I do own all of the art in this book (as the first A/N states). This is my first fic. I update as often as I can, especially on most weekends. Don't be afraid to comment if you have something to say.

Determination (Sans X Reader) by viralwigs

Next person to add this/comment gets c l o c k e d ~ When Frisk goes missing, you decide to look for them, only to fall into Mount Ebbot. You discover that you have the power to revive dead monsters. Wow, that's a lot for one person to have to deal with in a 24 hour time period, am I right?

Fight or Mercy | Underfell x Abused! Reader by YuniccAfton

[2nd book] ((COMPLETED)) {Undertale AU - Underfell} [WARNING:ENDING AND PLOT IS VERY CRINGEY] "Long ago, two races ruled the earth, the Humans and the Monsters. One day, war broke between the two races. Many have fallen to serve their kind. Years later, the humans were victorious. With their magic, seven of their strongest wizards sealed all the monsters underground with a magical barrier. Only a human soul could pass. Mt. Ebott 201X, they say those daring enough to climb up the mountain.... never return. " "Leave them, Y/N! Run! " ___________________________________________ I'm a Undertale addict. I freaking love the story line and characters! One of my favorite AUs is Underfell so I'm finally making an X reader. Also, if there are wrong spelling or grammar, please tell me. I'm using GoKeyboard. Enjoy my Crappy 2nd book!

{DISCONTINUED} Finding Home | Undertale Fanfic by DeathByAnarchy

DISCONTINUED (for now, at least) • • • You and your younger sister, Frisk, fell into a hole atop Mt. Ebott. You didn't realize the journey you just began by simply falling into a mountain. A goat woman by the name of Toriel took you both in to care for you. Everything was fine until Frisk suddenly disappeared one day. All she left behind referring to her whereabouts was a note. On it, she had said something about her 'going back home'. But wasn't she already Home?

L.O.V.E. (Yandere Fem Undertale x Child Reader) by Unidentified562

You live in Ebott City and you hear a story at the beginning of summer about the cursed mountain next to the city. You wanted to do something exciting for the summer and to you... What was more exciting than going to a mountain with a monster on it... Try falling into a hole into the kingdom of monsters where they accept human boys and men with open arms, but treat human girls and woman like the enemy due to them being sealed away by them.

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Slide 1 of 10

Ms. Teach (Sans x Reader) cover

A Tree, For Us (Sans X Reader) cover

A Strange Feeling (Sans X Reader) cover

Daybreak [ Error!Sans x Reader ] cover

Goodnight, Kiddo... (Adopted by Sans! Reader Fanfic) cover

Sans X Reader // You're Too Punny cover

Determination (Sans X Reader) cover

Fight or Mercy | Underfell x Abused! Reader cover

{DISCONTINUED} Finding Home | Undertale Fanfic cover

L.O.V.E. (Yandere Fem Undertale x Child Reader) cover

Ms. Teach (Sans x Reader)

Y/n is a music teacher, known for making music, and/or covering music and songs. Now, your working days at school are over, and decided to take a trip with your friends to a famous mountain, namely Mt. Ebott. That night, while everyone is sleeping, excluding you, you found a girl taking a walk on the mountain. Trailing her steps, you caught her jumping off. You hopped in after her, in hopes of her to survive the fall... And now you realized, it was your long lost little sister! Now things are gonna get awry. But still, You're filled with... no, not DETERMINATION... But... with TRUST. == + == + == Story: Finished ✅ Bonus Chapters 2 of them are DISCONTINUED (3/5)