Underlust! Bros x Innocent! Little Sister! Reader

3.7K 110 21
                                    

(don't worry it's wholesome :3 )
(*Insert me using incognito mode to refresh myself on the AU info*)

(Enjoy my author notes •v• )

Requested by the lovely BrightFire123!~

Oops! This image does not follow our content guidelines. To continue publishing, please remove it or upload a different image.


Requested by the lovely BrightFire123!~

You stacked yet another paper flower crown onto sleeping Sans' head, making it crown number three, and making him covered in an array of purple, pink, and blue paper flowers. Holding back your giggles you turned to your paper crafts, and completely missed Sans peeking open one eye at you.
Papyrus was out and about for the time being, doing whatever it was he did.
Time passed quietly, you shifting from your spot on the floor in front of the couch to add another flower crown to Sans' head every now and then.
Eventually, you ran out of paper, and so set your supplies on the coffee table before scooping up your paper scraps, tossing them in the bin in the kitchen.
"You're getting better at making these, y'know."
You yelped at the sound of Sans suddenly behind you, your flower crowns being dropped onto your head and obscuring your vision.
"You were awake!?"
"'Course I was." Sans laughed, watching you flounder with your blocked vision for a moment.
You pouted and puffed your cheeks out at him.
"No fair, I wanted to see your reaction..." You grumbled, taking a bright blue crown and dropping it onto his head again.
"Maybe next time." He chuckled, turning as the front door opened.
"Papy!" You gasped excitedly, grabbing a pink crown and running towards him. You jumped up onto your tiptoes, and Papyrus happily crouched down so you could drop the flower crown on his head.
"Thank you, (Y/n)! It's very lovely!"
You beamed up at him, getting a pat on the head before he moved to the kitchen to cook dinner.
To your delight, Frisk trotted in behind him, and you both spent the rest of the afternoon talking about sweets and childish cartoons. You both also got a laugh at Sans as he tried to find something more tame for you both to watch on the TV, bickering to himself at the amount of sexual content on the TV.

~~~

You were out and about getting groceries a few days later, your brothers tagging along. You were in the bread aisle when someone walked up to you.
You didn't understand what he was saying, but it sounded sexual, given his tone.
"I don't get it." You replied, watching his confusion turn into panic as he realized who you were.
"O-Oh uh s-sorry!" He stammered, turning around only to yelp at the sight of your brothers behind him.
They didn't look so flirty or playful.
Soon enough, the monster was chased off.
"Are you alright, (Y/n)?" Papyrus asked.
"Yep!" You replied cheerfully, the full weight of the situation flying over your head as you held up the package of bread in your hands. "I got the good bread too! Now let's home so we can make homemade garlic bread!"
Your brothers sighed in relief at the fact your innocence was still in tact, following you closely to the checkout counter.

Undertale AU Sibling OneshotsWhere stories live. Discover now