Undertale Au x Reader

US!Sans x Reader (Part One)

I do not own the picture of sans, nor you but I do own this story. There is some sexual content up ahead so if that bothers you, you don't have to read ittttt

Anyways enjoy!

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Blue smiled as he took off his leather gloves. Today he had caught a human, but he ended up making them his friend instead oh well! He stuck out his sky blue tongue as he tried to make the most perfect tacos he's ever created in the entire underground. But, that is so hard when he has Papyrus cracking jokes up, and down the halls of their small but rather roomy home.

"Knock, knock." (Y/n) piped in excitement was clear in their voice as Blue groaned.

"Who's there!" She said as her feet could be heard bouncing on the couch.

"Orange." She gasped looks like she might know this one...

"Orange who!" He could tell she was grinning ear to ear which made a smile creep onto his face.

"Orange ya glad ya met me." He said lazily.

"Oi!" Blue yelled from the kitchen, "I don't need to be hearing anymore knock knock jokes pappy!" He said coming in swaying his hips, "She's had enough for one day let her rest you're giving her an ear full!" Papyrus grinned, "if you do I swear to Asgore!" Paps grinned couldn't get any wider but...somehow it did.

"Guess you could say we've been having a taco for a time!" He said making gun fingers at him which made him roll his eyes in annoyance tapping his boot onto the wood.

"Oh ha hah, very funny now go to sleep ya lazy bones." He nodded dragging himself up onto the stairs slowly climbing up, "Sorry about that human." She waved her hands around trying to tell him it was alright he wasn't buying it.

"Really he was nice company!" He finally relented, and nodded, "Come on Blue let Carrot go to bed, and let's head to bed ourselves." He was going to get a blanket and pillow for her. Looks like their sleeping together he shrugged.

"Alrighty!" He was happier since she arrived. Papyrus noticed it as well time to put his theory to the test in the morning. The next morning Papyrus crept into Sans bedroom with a bottle of honey as he set it on the shelf near his brother's bed. If he brother drank it and got hyper it'd be normal but, if something else happens then his conclusion will have been right. Quickly he rushed out of the bedroom door quietly closing the door to make sure he'd wait downstairs watching Blooky's television show to seem less suspicious.

It had been a while since his brother came down don't tell him that he mixed up the candy for weed candy right there would be no possible way. He popped a brownie into his mouth no they were his so what was up?

Upstairs Sans was eyeing the drink from his brother he remembered what happened last time he drank it, and that awful headache that easily followed. What was his brother playing at?
Slipping his fingers around the bottle he brought it to his teeth and took a sip, then two then four, then he soon drank the entire bottle. (Y/n) woke up soon after rubbing her eyes at him.

"What's wrong blue?" She asked yawning before be whipped around tackling her.

"HUMAN!" He screamed Papyrus seemed happy with his result his brother was still innocent. Sans wrapped both gloved hands around her tightly as she pressed her hands to his face to try and attempt to push him away. He was strong like this, but she wasn't budging. Sighing she gave up defeat as he began tickling her squeals could be heard all the way downstairs before he went over her neck causing a moan to pass by her plump rosy lips.

"Human..what was that?" She shook her head quickly, "It was nothing but surely not!" He this time grabbed her neck gently rubbing his thumb across the sensitive skin, "Your face is red, and you're squirming!" She slid underneath him crawling to the door before he shot up his hand masking her soul in an eerie blue. "Leaving so soon?" He whined playfully before pulling her back, "But the fun is just starting?" He smirked dragging her magically to his race car bed setting her onto the covers gently.

"B.. Blue I can explain those noises can be explained!" She said trying to escape from this short skeleton.

"But, I think I want to find those reasons myself." He said purring into her ear then it clicked. He was in heat oh dear god she was screwed.

He snapped his fingers as the lights went out, and he began taking off his shoulder pads.

"Let the fun begin~" He purred.