Undertale AUs and Ships 18+ Lemon Children Beware

NightKiller (Nighmare x Killer)

(haiiiii First time doing stuff like this, I don't do POVs su yeah, IM EXITED let's do this shit)

Setting- Error's antivoid
Current situation- MOOVIE/GAME NIGHT!!! WOOOOOOOOOO

Tonight, was a great night for the so called 'Bad Guys'.

For t'was the night in the Antivoid,
when freinds would play.

For once in their sorry lives,
they weren't causing dismay.

A night where morals never existed.

A night where ANYTHING was permitted.

Like seriously 'caution to the winds' kinda crazy tonight, everyone's drunk or watching some football/moovies while the rest go crazy X3

Killer was drinking with Dust and Horror. "SooOoO, hOwSIt GoiN ×hic× wItH yOu aNd lUsT, hOrROr?" Said Dust as he took another sip of booze. Horror was looking off into the antivoid when he suddenly passed out from being drunk. "Oh.... mAn DOwn" he said as Error came to help get him a place to sleep.

Killer sighed, he was lonely, but was used to it since his AU 'went empty'. He looked over the bunch of people here, and saw Fresh in the chess tournament. He was winning against.... Cross? 'But how?? Cross isn't usually beaten' Killer thought to himself.

Killer decided to walk over a watch for a couple hours.

~ TIME SKIP by like....4...5 hours???~

Cross won the chess tournament then went off to find dream. Nightmare just got here. Killer was, SO BORED. But Yan Blue showed up and started flirting with Error, so that was something.

The party got so popular people from other multiverses started showing up. Leaving Killer crowded and annoyed.

Nightmare eventually ran into Killer, quite literally. "Oof" said Nightmare hit the ground. (Yes I fucking did) "oh, sorry nightmare... didn't mean to" said killer as he helped nightmare up. "Whatever" Nightmare sighed.

Then lust came along an bashed their their skulls together ending in a loud CLANK. Killer blushed in embarrassment while Nightmare had a disgusted look on his face.

"Your welcome~!" Lust chuckled as he walked off. ".....who....the hell......LET THAT THING IN HERE" Nightmare yelled and stormed while killer was pulling his hood over his blushing face. 'God damnit!! WHY AM I BLUSHING!?'. A slight hush when over the people around them as Nightmare yelled at Lust.

"Ey! Yo... Yo" said fresh as he showed up trying to calm Nightmare down.
"There are some totally unrad vibes up in here dawg, ya need ta tone down a lil, kay?" As he looked over at Killer he gave a smirk. "Well wouldya look at that" he muddered to himself. Fresh walked off saying "keep it calm broskis, don't wanna be an all up party pooper eh?".

Nightmare took a look over at Killer, almost disgusted, yet surprised. Nightmare eventually caught himself staring right at Killer, not just that, he was blushing too. Killer peeked out from his fluffy shame cave. (PUN INTENDED)!

A couple hours passed and things calmed down a bit. Killer was reading a book next to dust, who surprisingly hadn't joined horror in passing out. "WELL!! I'm in hangover and life sucks..." said dust. "Ya don't say..." Sighed Killer as he took a sip of booze.

Then Lust scooted next to Killer, who groaned then looked at lust. Killer snarled a "What!?"

"Jeez, up tight much~?" Lust teased, "Shut your damn mouth, wadaya want?" Killer dog-eared the page he was on and closed his book. "I just so happen to want to know how you and nightmare played out!" Lust looked.... concerned? "He let me off the hook no thanks to you..." Killer got out his knife and messed with it a bit. "I see....sorry" Lust got up and left.

'damn right' Killer thought to himself. But on the other hand...

"GAH!! GODDAMNIT" Nightmare yelled at himself in the mirror. He didn't like this feeling, this stirring of positive energy in his stomache. He hated this heat in his face. It made him sick. "What the HELL!?" He leaned against the bathroom wall and slid down to the floor. He wrapped himself in his tentacles and went to his 'happy place'.

Eventually, people began to leave. Error let out a sigh of relief as people poured out of the antivoid. Eventually leaving just him and his team.... And a HUGE mess. "D-d-amn-i-It" Error looked over the sea of bottles, food, food wrappers, and whatever the hell people brought here.

Finally. . .
.
Peace. . .
.
.
.
.
Quiet. . . .
.
.
Too quiet
.
.
Dust decided to break the silence and start singing that good ol song they all used to sing.... The same good ol song they still sing today...
"Hearts of ours are still so black,
And yet we go on together.
A family we call ourselves,
Our minds are not so bitter..."

As Horror heard Dust sing, he decided to chime in...
"As lives of ours are made of blood,
Our paths are paved with bone...
We continue with eachother,
No one should face this on their own.."

"Could you SHUT THE HELL UP WITH THAT GODDAMN SONG" Nightmare screamed.....Killer looked over with worry in his eyes and decided to walk into the bathroom. The rest of the team looking at him in worry as he passed by.

Killer lightly knocked on the bathroom door. "Hey......can I come in?....." Killer wispered. Then, the door unlocked as Killer got dragged into the bathroom with Nightmare. Killer squeaked "EEP-"

"What are you doing to me???" Nightmare said with a deep blush over his face. He did not like this feeling one bit, DESPISED IT.......but.........it was......nice....

"G-gh b-boss?? I-im really sorry- I dont know, really" Killer struggled a bit in Nightmare's grip as he wrapped a tentacle around Killer. 'Is this where I die????' Killer thought to himself before Nightmare pulled(more like forced) Killer into a kiss. Killer's face bightening with blush as well.

".....Dont struggle...." Nightmare snuck his hand under Killer's shirt and ever so slowly stroked Killer's ribcage. Nightmare didnt know what was driving him to do this, but he.....needed this.... "hh- b-boss!?" Killer bit his lower.....lip?????(idfk their skeletons, fuck it) This was not normal for Nightmare, not normal at all. He didnt dare move.

(NOT FINISHED X3)