UnderTale Universe One-shots

US!Sans x Reader: I Dare You

I had a lot of fun making this one, so I hope you guys have a lot of fun reading it!

It was pouring down rain outside, and everyone was stuck inside for the day, so Undyne had suggested Truth Or Dare, and with everyone in agreement, shit was about to go down.

"U-Um, P-Papyrus! T-Truth o-or d-dare!" Undyne stammered smiling. "Uh, dare I guess." Papyrus said shrugging uncaringly. "I-I d-dare y-you t-to e-eat a-all o-of S-Sans's t-tacos!" Undyne stammered putting her hands on her hips proudly.

"NOOOO! NOT ALL OF MY EXPERTLY MADE TACOS!!" Sans whined looking distressed. "Sorry bro." Papyrus said taking a huge plate of tacos out of there fridge. "But a dares a dare!" Papyrus quickly scarfed down all of the tacos despite Sans's whines and shouts of protest.

"UNDYNE HOW COULD YOU DO THIS TO THE GREAT AND LOVEABLE SANS!!" (I wanna know who got that reference!! ^^) He shouted crossing his arms and pouting cutely like an angry toddler. "Hey don't worry Sans! We can make more later!" You said trying not to laugh at his cute little expression. Sans only sighed and nodded. You faintly heard Undyne whispering something about shipping but you ignored it.

"Alphys truth or dare?" Papyrus asked the ex captain of the royal guard. "Truth." Alphys simply replied. "Who's do you like?" Papyrus lazily asked. "Ad if it wasn't clear enough," Alphys began and put an arm around Undyne making her flustered, "I LOVE this pretty fish lady right here!"

After about 5 minutes of Awwing giggling, and Undyne's face becoming a tomato, you all FINALLY moved on.

"Y/N TRUTH OR DARE!?" Alphys shouted with a toothy smile. "DARE!" You said confidently and crossing your arms in pride. Alphys grinned darkly and chuckled. "I dare you to kiss Sans!" That second all the confidence and bravery left you in the dust, leaving you a blushing tomato. You looked at Sans, who's skull was a bright blue. "Got a problem with that?" Alphys grinned. "N-no not a-at a-all!" You stammered sounding more like Undyne than yourself.

"Then go on then bestie, kiss the skeleton!" You looked at Papyrus for help, but he was only holding up a camera. "C'mon Y/n, a dares a dare!" Papyrus taunted. You made a mental note to destroy Alphys and Papyrus later and turned to Sans, who looked like he couldn't decide between happiness or embarrassment

You and Sans had a staring contest for a couple of heartbeats until you heard Undyne shout. "J-JUST K-KISS S-SO I-I C-CAN M-MAKE T-THIS S-SHIP C-CANNON!!" At that second Sans grabbed you by the shirt collar and pulled you into a kiss. Your eyes widened, there were fireworks, fireworks going off in your head. Everyone else in the room dissappearing, until you had to break away for air.

Then Sans's eye sockets widened. "OH GAWSH HUMAN I'M SO-" Sans shouted trying to cover his face with his cape but you cut him off by kissing him on his cheekbone. "S-sorry..." Sans trailed off looking up at you sweetly. You smiled softly and he reflected it. "I-I love you Y/n!" Sans said loud enough for only you to hear. "I love you too you little blueberry!" You said making him blush bright blue.

That second the rest of the world hit you, hit you hard. Papyrus looked ready to jump up and get the pictures that he took printed, Undyne was having a fangirl attack, and Alphys had never looked so proud of herself. You smirked and pulled Sans onto your lap making him yelp in surprise. "You wanna get revenge?" You whispered where his ear would be. "YES! Y/N LET'S TEACH THEM A LESSON!!" Sans whisper-yelled.

"Hey Undyne truth or dare?" You asked hugging Sans like he was a giant stuffed animal. "O-oh, D-dare p-please!" Undyne replied stammering. You looked down at Sans who nodded grinning, giving you a signal to do the worst thing you could think of.

"I dare you to play 7 minutes in heaven with Alphys."