Yandere Undertale Au's x reader oneshots

yandere!Nightmare x reader

Requested by
Faythsmithson123

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Your pov
You we're making your way on the "dreams and nightmares tree" up in the hill, once you got there you saw dream sleeping quietly. An idea popped in your mind as you giggled and approach at dream's sleeping body quietly

Dream's pov
I was making my way on the tree as i sat down near the part of me. I lay my back there on my part tree and let myself slip on a loving embrace of the slumber

(Minutes later)

I woke up of the sound of the leaves rustling not far from me to hear, i looked at it suspiciously as i spoke "who's there?!"

No one response

I shrug and close my eyes again

But interrupted by someone poke my nose. I opened my eyes to see y/n looking at me while she poke again my nose, she giggled, i blushed. "Y/n w-what are you doing here??" I asked her as she cocked his head "nnnnoootthing" she grinned as she came closer to me "uhh y/-y/n wh-what are you doin-" i was cut off by her tickling me, i begged only for her to tickle me even more, i was laughing so hard that i couldn't breathe, wait! Skeletons doesn't have organs or lungs how is that even happen, life is really weird

your pov
You stop tickling dream as he catches more air from all the laughing. You giggle cutely but soon as stop when you sense like someone is watching you from afar. You shrugged off the feeling at looked ar dream. You smiled "hey! Dream where is your brother nightmare ?" Dream looked at you with wide eye-sockets as he began to sweat "he...umm" dream began feeling uncomfortable but you soon said "nevermind. Lets just change the topic" you say happily and smile, dream agrees and smiles

nightmare's pov
I watched y/n from the bushes afar from my brother, dream , there was a silent between y/n and dream but then y/n spoke "hey! Dream where is your brother, nightmare ?" I blushes as i felt flustered by her angel voice. I've notice that my brother began to sweat and feel uncomfortable , i glared daggers at him. Y/n notice the uncomfortable feeling of my brother so she spoked "nevermind. Lets just chabge the topic" she said and smiled at dre- Wait! Did she just smiled at my brother!? I SHOULD BE THE ONE THAT CAN HAVE MY Y/N'S BEAUTIFUL SMILE!! NOT HIM!!! i grumbled under my breathe as i death glare my brother from afar. Then teleport to my castle and sat on my throne still angry from what i just saw. Until an idea popped in my mind how about we kill dream so that i can have my precious y/n and only mine alone THAT WOULD BE A GREAT IDEA!! But how can we do that then another idea popped as i smirked evilly and giggle demonically

Tem skip brought to you by epic bruh >:3 ( meh )

(Still nightmare's pov)

I slowly peaked and spy on my brother as he keeps blushing. He let out a loud sign and fell on his bed " i wish y/n would loved me " he closed his eye-sockets this is my chance i go out of my hiding spot and smirk i already knew dream could sense me dream quickly sit up and looked at me with horror and shock written all over his face, i giggled "wh-what are yiu doi-going her-here!?" He stutters and backs away, he grabs his weapon and try shooting me as my tentacles grabs his bow and broke it in half "i nothing really i was just here to give and say something to you" i smirked evilly as my tentacles grabs his hands and foot preventing him from escaping. I approached him and hold his chin. My other tentacle stab him from the back as he coughed and scream in agony " you know ever since y/n has appeared and you always want her attention i have something really wanted to tell you from a thousand years" i lean on his non-existing ear "YOU BETTER STAY AWAY FROM MY PRECIOUS Y/N DEAR BROTHER!" I backed away as i use a plenty of bones and hit it on my brother. Until i hear a portal opening, i glance and saw ink stares in shock and horror, my smirk grew wider "ooh you not getting away from me you little piece of shit" i say in a demonic voice and my tentacle grab hiss foot and stab his chest. I stopped when i heard a load scream. I immediately turned around to see my precious flower "n-nightmare how...HOW COULD YOU!!" She started to run off but i blocked the doors and release my dead brother and his @sshole friend , i teleported behind her, she turned around to see me infront of her as she stumbled on her feet and fell to the floor, i crouched and put my hand on his cheek. She began to flinch and tear up. I hugged her "there there nonneed to cry my precious sweetheart no one can steal you away from me. You will be mine and only mine" i whispered and kisses her lips passionately as she fell unconscious

Your mine now =)