Undertale & Deltarune Oneshots

☆Cozy- Killer Sans x NB Reader

Plot: Killer comes home to find you wrapped up in blankets on the couch, and he doesn't wanna be left out

Requested By: KillerSans3565

~☆~

You turned your head as you heard the sound of the front door opening, smiling as you saw your boyfriend walk in. Once he closes the door and took his shoes and jacket off, he seemed surprised to see you on the couch and all wrapped up in blankets. It was normal for you at this time of year, seeing as it was winter and it was snowing outside. Long story short, it was fucking cold and this bastard couldn't feel it since he has no skin.

He rushes over to you, throwing himself on top of you and looking down into your eyes. "Hey sexy, whatcha up to?" He asks.

"Well I was trying to keep warm and watch a movie, and now I can't seem to do either," you replied.

"You're still wrapped in blankets, how are you not warm?" He asks, crawling off of you and allowing you to sit up.

"Cause it's fucking cold in this house, the heaters broken or something," you said.

He frowned and gently rubbed your cheek, "don't worry, I'll get it fixed up. You get back to your movie, I won't be long!"

You tried to stop him, tried to tell him that it was almost a blizzard out there, but he already had his shoes back on and was out the door before you could even mutter a word.

You sighed and got back to whatever mind numbing movie you were previously watching, waiting for what seemed like forever until he walked back inside, covered in snow.

"Problem solved! Thank god Nightmare taught me hoe to fix shit," he said, brushing the snow off of him and taking his shoes off once more before walking over to the wall and turning the heater on. "There we go, now it's cuddle time."

"Not so fast, mister. You're clothes are soaking wet from all that snow. Go put some dry clothes on or else you get no snuggles," you said sternly, watching as he frowned and sighed before walking up the stairs. You smiled to yourself and paused your movie, knowing that it wouldn't take him long to come back and you wouldn't be able to watch it. Now that you were really paying attention to it in the first place.

Soon enough, Killer came back downstairs in dry clothes but also with a lot of blankets and pillows in tow. You looked at him with a puzzled expression, to which he smiled and threw all of it on top of you.

"For maximum comfiness, we are going to build a blanket fort, make some snack, and watch Suicide Squad!" He said, already beginning construction as you slowly unwrap yourself from your blanket cocoon.

"Do I have a choice?" You asked jokingly, picking up another blanket and helping him out.

"Nope, I'll tie you to the couch if I have to. I'm getting cuddles one way or another," he said with a sinister smirk on his face. You roll your eyes, tossing a pillow at him in response. It hit him in the head, causing his skull to fall off and hit the floor. He laughed and picked his skull back up and putting it back into place, "you've gone and done it now, prepare for war."

He picked up the pillow you threw at him, immediately charging at you. You quickly pick up your own pillow and block his attack, though the impact did make you fall to the floor. He slams the pillow down towards you, but your quickly roll to the side just in time. You jump off on the floor and attempt to hit him from behind, but he turns around and blocks it flawlessly. Back and forth you both went, attacking and blocking but neither of you managed to land a blow. Soon enough, you were both lying on the floor, exhausted and breathing heavily yet still trying to smack each other. He agreed to a tie.

The fort building process resumed after that, and it was done in no time as soon as you both stopped horsing around. Killer decided that he would handle the snack try while you got comfortable in the fort and started the movie.

When he came back, he set the snacks and drinks on the coffee table in front of you before snuggling into the blanket with you, allowing you to hold him close while he held you.

As the movie began, Killer looked up at you. "I never asked, who's your favorite character in this movie?"

You then realized that throughout the entirety of you're relationship, you've never really talked about movies much aside from your argument over which Disney Princess was the best.

"Umm, probably (you're favorite Suicide Squad character). What's yours?"

He didn't even have to think about, "Harley Quinn, she's a psycho and I love it."

"She is pretty awesome," you say, both of you turning your attention back to the movie.

Eventually, about halfway through the movie, most of the snacks were gone and you could feel yourself slowly falling asleep. Killer didn't seem to notice your decreasing lack of attention on the movie, which was fine with you considering how much he loved the movie and hardly payed attention to anything else while watching it. Though, as he felt your grip on him slowly loosen, he looked up at you and smiled.

"Tired?"

You blinked a few times, doing your best to stay awake. "A little bit, its fine though. You can keep watching the movie."

"I was planning on that bit, but I'm gonna do something else first," he said, slowly getting off of you and flipping you both over so you were lying on top of him. He held you close as he adjusted the blanket over you. "There we go, all cozy and ready for sleep."

"Are you sure, I can stay awake to watch the movie with you."

"Nah, it's fine. Go ahead and sleep, I know it's late. Besides, you're adorable when you sleep," he said, gently running his fingers through your hair to help you relax. Soon enough, you felt your eyes drooping shit once more, but before you fell asleep you felt Killer place a gentle kiss on the top of your head before he went back to playing with your hair.

"Goodnight, cutie."