Undertalesmut Stories

Monsters always fasinated you. Ever since Frisk broke the barrier and freed the monsters, humanity didnt take it too well but they are slowly getting used to it. Slowly...

im sooo sorry😔💅🏽

Title says it all! Ranked 5 in "undertalesmut" on 07/15/2018 #7 in "Undertaleoneshots" on 5-11-19 #6 in "Undertaleoneshots" on 5-19-19 #5 i...

Yep. I'm making one of these. It will include one shots of EVERY Undertale character. From Froggit to Chara. Feel free to leave requests. I will do Lemons and Smut if yo...

you. snas. saness. sanz. sans. however u like to call em. knocking ankles. what else is there to say? male reader included as well as fem reader vers cover creds: no cl...

(Comes back 4 years late w Starbucks and improvement) Hello! Welcome! Sin!

Just a lot of Crossmare. May contain smut, may not. There will be multiple stories in here, and I won't update this book as much as my other Crossmare book. ALSO! There...

not every story has a happy ending

This is my first fanfic, so please don't hate me for if anything doesn't make sense T-T WARNING: Mature content!!!!!

oneshot ;)

Undertale lemon with female reader! May make a male one but not quite sure. May also include some bits from the video game. Please don't read if you don't like lemons! I...

<18+> In the Undertale universe, a different human child falls down into the underground. Even though she is very young she will have to find her way home or stay...

they deleted it dawg

Tell me if you want smut or innocent sweet love... your choice.

Sweat, baby, sweat, baby sex is a Texas drought Me and you do the kind of stuff that only Prince would sing about So put your hands down my pants and I'll bet you'll fee...

Smut basically

Feel free to request any Sans X Reader Oneshot, you can request Fluff, Drama, Smut/Lemon and others! You can even request AUs of any kind, well, except for Underlust bec...