undertail | Undertale Kink Meme

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here ya go. i hope you like it!
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Sans’s didn't know whose idea was it to string mistletoe above the kitchen doorway. Whoever they were, he acknowledged their cunning and seasonal prank mastery, since he's fairly certain people don't put these things up unironically nowadays.

Sans stood beneath the doorway, staring up at the toxic, parasitic plant that dangled innocently from it. Across from him, Papyrus squinted at the bundle of leaves, puzzled by its place on the skeleton brothers’ ceiling.

“Sans, did you buy another house plant?” Papyrus asked. Sans snorted at the memory of the last time he tried to take care of something living. Rest in peace Planty, you will be missed.

“Nah, I could never replace the last one,” Sans replied with a shrug of his shoulders, leaning against the door frame.

“Then… What is it?” Papyrus asked again, looking more and more confused with each passing moment. Sans would have liked to leave him floundering for a few moments more, since that bewildered expression was so comical, but he could never leave his bro hanging.

“Mistletoe.”

“It does not look like an appendage, nor a destructive weapon!”

“That's because it's a plant.”

“Then what is it doing on our door frame?”

“It's a human tradition. If two people pass under it at the same time, they gotta kiss.”

“Why?”

“Gee, I dunno. Christmas laws. Can’t break ‘em.”

Papyrus's confused expression morphed into extreme concern at the thought of breaking the “Christmas laws”, as Sans so wisely put it. The smaller skeleton chortled and concentrated his magic, creating a transparent and soft pair of glowing blue lips. He puckered them teasingly, moving just an inch forward.

“C’mon, bro, it's the rules,” Sans teased, smacking his magical lips in a playful manner and punctuating the move with a flirtatious wink. Man, this whole mistletoe shebang was great for prank opportunities, he wondered why-

Every thought process slowed to a sudden halt when Sans felt a pair of warm, pliant lips against his. He jolted in surprise, finally realizing just how close his brother’s face is, and holy cow he's kissing Papyrus, and more importantly, when the hell did his innocent brother learn how to summon lips?

Sans stood there, like a deer in headlights, as Papyrus's lips pressed against his own. They were warm, and very soft, almost satiny. Papyrus stood just as immobile as his brother, probably unaware of what to do.

Sans pulled away first, his hands flying to his mouth and a blush threatening to dye his cheeks. He fought off his surprise. Play it cool. Nothing's wrong.

“Jeez, Pap, ya didn't have to kiss me on the lips,” Sans said, fighting off the shakiness in his voice. This would all be water under the bridge. He tried to laugh off his disappointment and forget the feel of Papyrus's lips. “That was pretty funny, bro. You just came on over and planted a- mff!”

Papyrus interrupted him, again by kissing him, but this time he grasped the front of Sans’s jacket and hauled him forward until their lips connected with bruising force. Sans couldn't stop the moan that bubbled up in his throat in time.

Papyrus pulled back, his cheeks orange and fistfuls of Sans’s jacket caught in his hands. Sans tried not to look mortified. “Uh…” Words, for the moment, failed him.

“Again.”

“W-what?”

Papyrus's lower lip caught between his teeth and Sans felt his gaze straying to the sight. “Kiss me again, and really show me how!” Papyrus looked down at him and his grip softened. He smoothed out the wrinkles in Sans’s jacket- not like the smaller skeleton cared at all- bashfully. “Please?” he added.

Well, Sans couldn't say no to that face.

“Can you summon a tongue?” Sans asked, his own already resting just behind his teeth. Papyrus nodded. “Awesome.”

Sans gripped the back of his brother’s head and hauled him down into a third kiss. He had to stand on his tiptoes, even with Papyrus bending over, but he could honestly give less of a shit. Their lips slid together perfectly, moving in an intricate dance that sent shivers up Sans’s spine and provoked a surprised gasp from Papyrus. Sans took the opportunity to press his tongue forward, slipping it with little trouble into Papyrus's open mouth.

His brother groaned and clutched at Sans’s shoulders, his fingers digging into his jacket. Papyrus's tongue responded shyly, but soon they moved into a passionate exploration of each other's mouths. Papyrus was unsurprisingly vocal, letting out soft whispers and moans as Sans’s experienced lips and teeth and tongue worked their magic (pun intended). Sans caught Papyrus's lower lip between his teeth and gently applied pressure, drawing a strangled noise from his brother.

He found himself pressed up against a wall with little warning. His head fell back in surprise and their lips parted with a slick pop. The two brothers stared at each other, awestruck. Then Sans snorted and Papyrus giggled, and soon they collapsed onto the floor in a pile of helpless laughter.

Sans made a mental note to thank whoever put up that mistletoe later.

Undertale Kink Meme

Re: fontcest: kissing with ecto-lips [fill]