Yandere Undertale Au's x reader oneshots

Yandere!dusttale sans x adopted!reader

Requested by: invadertord2030
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3rd person

One night a killer was on a spree to kill people's lives as possible he ended up on a couple with their son and he kill both lovers, he look at the child then back to the two persons he killed. His eyes lock with the baby's beautiful e/c orbs, bending down grabbing a child he smiles "I'll be your father now, my little y/n" the baby smiles at her new name as they both went away...

2 months later

Y/n POV

"Aim for the target" i glared at the dummy and gripped at my weapon of choice (which was a dagger) .
"Go" i throw the dagger and it hit right in the foreheard of the dummy,
My dad bend down to my height (your smaller than Jason ) "good job you did there , princess" ruffling my hair i pout
"Don't call me princess ddadd" he chuckled "sorry i'm dad"
We both laugh but then we heard a scream so we both stop.
Dad stood up "grab your weapon" i nod and grab the kitchen knife,
We walk to the shadows and check if there was anyone around but instead we found a dead bloody body.
"There must be around" standing up i approached the body and it looks like as is 'she'.
It wears a blue and 2 purple stripes sweater, browns shorts,black leggings and combat boots.
Gulping i heard my dad "Lets go back now" grabbing my trusty lighter i burnt the body and we left it burnin',
While we we're walking i have a bad feeling that someone was watching from afar but i couldn't get to know who was it.

The only thing i would hear was me and my dad's footsteps,
I suddenly felt a strong grip on my foot and it dragged me from the bushes.
Screaming for help i try to pray the hand off but it's not just a hand....
A skeleton.

Dust POV

Chara is such an asshole! Couldn't even save their life or survive my attacks,
Signing from distress, glaring at the sun "i need to get goinh"
I grip on my knife but then i heard footsteps so i hid behind the bushes.
A man with a mask comes out with a girl besides her,
I thought for a minute then "Wait! Is he.....Jason?" Curious slapped on my face as if i was an idiot he is jason.
The girl burnt the body of chara and i was...quite suprise
"She could be interesting" i lick my lips and smirk
Then they both leave.

Crouching every bushes i watch as the female walk with her father and i can't help to stare at her beautiful e/c orbs,
'I'm gonna make you mine,only mine'
I grab her foot and drag her onto me,
Her eyes widen "Le-let me g-go!?" I chuckled,
And bend down grabbing her chin "you can't outrun from me, flower"
Then a axe almost hit my skull
I growl and look up "No one dare-" before i could finish he grab me by my jacket "NEVER EVER TOUCH MY DAUGHTER!"
By its voice i flinched on how dark his voice was and it sends chills down my spine,
He let me go but i was catched my the girl "Dad that's not the proper way to put someone down" she glared at her dad
Then he left and she puts me down "sorry about my dad and also your quite Light" a purple hue slap me across both of my bone cheeks "Are you blushing?" She's trying to hold back her laughter
" no i d-don't"
"Anyways do you want to come with us?" I thought for a moment
'Ya should brother'
I replied "Yea sure thing"

~~2 years later ~~

I had been living with my precious flower and i can't help but to want her to be mine and only my property.
Today was school and she has to attend and i walk with her down the streets,
People don't know about the three of us not knowingly that we we're serial killers,
Most popular was Jason
Then this boy went up to y/n, he is Ben (sorry if your name is Ben you can change it)
Everytime when my precious goes home she would always talk about that PEST!
But save his moments for today cause he's greeting death tonight...

3rd person

It was the end of the day
Ben and y/n we're hanging around at the tree near the forest and dust was taking an eye on that boy,
Y/n stood up and told her that she needs to buy something.
Ben agree to this so she left and now it was dust time to do it to get rid of this trash and save her precious flower.
Dust I Marge from the shadows and approached Ben
"I'm sorry to bargain but can you please help me find my cat?"
He pleased fakely
"Okay so where did your cat go?"
Ben fall for dust plan already
"In the forest" they both got onto the forest and when they arrive where Ben's death was going to be
He smirked
"It was right here" he look at the boy with a smirk and a devil's eyes
Ben shrieked ,
Dust pull out a knife "you had been blocking my path to get to my flower"
"wh-what do you me-mean??"
"You stolen my precious Y/n!!" Dust raised his hands and bones popped out hitting the teenager's arms and legs
Ben scream at the pain he felt
"The only way i could have my y/n was to get rid of you"
Dust pull out bone and stabs the teenagers stomach
"YOU STOLE HER FROM ME!"
He stab and stab again and again till' the grass turns red
Dust stood up and drag the body to the tree,
Looking around he saw no one
He puts Ben's corpse under the tree and he hid at the same spot
Once y/n saw it she screamed and cried
Dust signs and went back to their house
Jason found him on his bloody clothes
"You look happy" Jason compliments
"I just killed a bastard that blocked my path"
He chuckled "heh, i'll let you have your way i wouldn't disturb you"
his eyes widen and chuckled "ya better be but right now need to change my clothes"

Your POV

I went back home crying and slam the door open and close it,
Dust popped out "is there something wrong?"
He ask "someone killed Ben" i burst in tears and he hugged me
"Don't worry y/n i'll protect you no matter what"
Then his grip started to get tight
"I'll make sure no one blocks my path and love for you, your mine and only mine"
My eyes widen
"Forever....."

FINALLY DANG I'M DONE!
HAHAHAHA