"Papyruuuuus!" An angry Sans stormed into his brother's room. "What did I say about leaving that sock downstairs!?"

"Ya told me to pick it up, bro." Papyrus responded nonchalantly, laying in his bed.

"Well?!" Sans asked, impatiently.

"I did."

"Then why is it still there?!"

" 'Cuz ya never told me to move it."

Sans groaned in frustration. His brother was always finding loopholes in the commands he gave. And it was absolutely unbearable.

"Well next time, actually MOVE it!"

"Gotcha, bro."

As Sans exited the room, he could've sworn he saw his brother pull a mischievous grin. He knew he was up to something.

…

"PAPYRUS!" Sans found himself storming into his brother's room yet again. "YOUR SOCK IS STILL DOWNSTAIRS!"

"Hey, I moved like you told me to."

"TWO INCHES! YOU MOVED IT TWO INCHES!"

"You told me to move it so I did."

Sans let out another groan. There he goes again, poking loopholes in his orders again. He sighs and rubs his temples. "Next time, bring it to your room. Alright?"

"Gotcha, bro."

And once again, Sans swore he saw Papyrus grin before he left his room. He was certain of it. But he had more important things to worry about than what his mischievous lazy brother was up to.

…

Papyrus was casually chilling out in his room, listening to some sick beats when all of a sudden, his older brother kicked in through the door. "ARE YOU LOOKING TO HAVE A BAD TIME, PAPYRUS?"

"What'd I do now."

"I TOLD YOU TO BRING THAT FREAKING SOCK TO YOUR ROOM!"

"And I did."

"IT'S STILL THERE!"

"I know."

"...Oh my God, you brought it back, didn't you."

"Ya didn't say I had to keep it here."

This time, Sans yelled out in frustration. He ALWAYS does this. He just never listens to Sans. Sans stormed out of the house without saying a word. He was already stressed out about some affairs in the Royal Guard, he definitely did not need this.

…

"Did you pick up your sock?"

"Hm?" Papyrus removed his headphones to hear what his brother had said.

"I said, did you pick up your sock?"

"Huh? Oh, yeah. I picked it up."

"What made you come around?"

"Well, I saw that you were preeeetty stressed out about the whole Royal Guard thing and whatnot. So I thought I would give ya a break today."

Sans grasped his chest and smiled. "Wow. Really? Thanks bro. Hey, why don't we go to Grillby's tonight? On me?"

"Sure thing, bro."

Sans smiled and turned to leave the room, before his brother called out to him again.

"Yeah?" And as he turned to face Papyrus, the same sock that had been nagging him for the past few days returned, this time on his face. Sans was about to snap, but he had noticed something on the sock. It was nothing more, nothing less, than a note.

"LOVE YA, BRO. GOOD LUCK WITH THE RG THING

-YOUR BRO PAPY"

Sans looked at his brother, who gave him a wink and a thumbs-up, and smiled. "...Thanks bro." He sniffled and left Papyrus's room, the latter of which had smirked as he laid back down in his bed.

"Sometimes, Sansy-boy, I wonder which of us is the older brother."

Alright, so! UnderSwap is without a doubt one of my favorite AUs for Undertale, so I decided I'd write a few fics on it! What I did was, I grabbed two characters who were swapped, and wrote a story based on how they interacted with each other in this alternate world. Tell me what you guys think about this little "miniseries" of sorts, and as a hint for the next one...Well...Lets just say it won't be so cheerful as this one. *evil, mischevious grin*