All Undertale AUs x reader One-Shots

You belong to me. Yandere!Uf!Sans x Reader

Your pov:
Just a boring day with me and my friends watching (f/m/n) {favorite movie name} "oh my God I am soooo bored" (f/n) said as she sighs deeply, as she said that I heard a door knock. I walk to the door and open it as I see Uf! Sans. "o-oh hey there sans what's up? " you said smiling "hey there kiddo I'm good what about you? It's been awhile since I seen you (y/n)." uf! sans said as he scratches behind his head. "oh yeah I've been good too, same here sans I missed you" I hug uf! Sans as he hugs me back. I pulled away and sighs happily "so what you've been doing these past months?" uf! Sans ask " oh I've been doing writing a book I'm still working at it heh " I said

{sometimes later cuz I'm lazy just like sans}

I look outside it was getting darker "hey sans I think you should leave it's getting dark and I don't want your brother to get angry at you" I said seeing uf! Sans has a sadden in his eyes "yeah.. I should, don't want bro- I mean boss to get mad heheh" uf!sans saids laughing nervously as he leaves.

Uf! Sans pov:
Oh man I was enjoying hanging out with (y/n), she's so beautiful when she smiling and laughing with my puns. I wish I could just keep her mine to myself no one else but that'll just creep her out she'll just think I'm a weird creep....no she wouldn't she.. I know she loves me too..i know it. When I was thinking (y/n) called my name as she told me I should leave I was kinda sad but I knew that she doesn't wanted me to get in trouble by papyrus

{The next day}

Your pov:
I step out of my house as I take a deep breath, I walk to snowdin seeing everyone waving at me "oh my God hey there frisk! " I said as I walk up to frisk as she turns around while holding monster kid. When I saw her holding onto monster I stop my tracks "o-oh hey there (y/n) I haven't seen you for so long" frisk looked really nervous I starting laugh "I'm so happy that your with monster kid I knew you would go out with him!!!" I said hugging frisk as I hug frisk, I felt like someone was watching me but I ignored it. Frisk was shocked but glad that I wasn't awkward out. Later on I was hanging out with frisk but it started getting dark so I decided to leave "frisk I have to leave see you later frisk" I said as I wave to frisk then leaves. On my way back to home I felt like someone was fallowing me "who's there? " I asked as I did someone appears behind me I turn around and sees Sans covered in dust "s-sans whats happened in why are you covered in dust" I look at sans scared of what's gonna happen next sans comes closer to me holding my chin "oh (y/n)~ my precious (y/n) I've been wanting to do this to you for so long" uf! Sans said looking at me with lust in his eyes "sans please let me go.. I'm getting scared stop this isn't funny" as I get even more scared than ever uf! Sans puts a finger on my lips to shush me "shhhh it's okay (y/n) everything is going to be okay" sans said as he pulls out a napkin with some kind of weird liquid and covers my mouth and nose I wouldn't breath as I tried to move away from it I started getting sleepy

{Later on }

I wake up being chained up I started panicking trying to pull the chains away while I was uf! Sans appears in front me while more dust on him then I realize.....he must've murdered frisk too.. Sans looks at me worried "aww don't cry my princess it's okay I'm
here" I glare at him "YOU MONSTER YOU KILLED EVERYONE!" I yelled as I continue crying uf!sans just laugh it off like it was a pun I made, as he slams a bone right next to me "heheh listen here baby cheeks I want you to know this that I killed everyone because they were in the way and I'll give you a warning that if you even get close to anybody I mean anybody I'll kill them your mine, you belong to me no one else" uf! Sans said as he starts laughing insanely, since that day I was locked up in uf! Sans room nobody was able to help me or save me because....... Their all dead

Yaaay finally finished