"Come on, buddy, let's go."

The door magically opened for Sans as he supported a nearly passed out Frisk on his shoulder.

"Saaaaanssss…" the drunk girl whispered. She was whispering directly into his ear, and it made him shiver. "I'm thirstyyyyy…"

"Don't worry, I'll get you some water, we just need to get to the couch." Sans responded with a laugh. Frisk simply giggled. Sans helped her inside and the door closed behind them, courtesy of San's magic. He led her around the sofa and to its front, where he gently laid her down on it. Once she was down, Sans noticed her shirt had ridden up so much that her bra was visible underneath. He shook his head and reached over, tugging it back down. He was only able to get down to her belly button before she giggled and slapped his hands away. He laughed, and walked into the kitchen.

Sans grabbed a glass and turned on the faucet. As the cup filled with water, he reminisced about the night's events.

He couldn't believe how much time had already passed since they'd made it to the surface; Frisk had turned 21 today, so they went out to a bar so Frisk could have her first drink. Sans had warned her not to drink too much, but she assured him she would be fine.

Turns out she was quite a lightweight.

Sans offered to take her home while everyone else stayed back for a while. Sans knew it would likely be at least a few hours until they all went home; they rarely got to gather together, what with all of their new responsibilities since coming to the surface.

Sans had become so lost in thought that he hadn't noticed the glass was ready until it overflowed into his hand. He shut off the water, dumped out a bit of the water, dried off his hand, and returned to the living room. Sans nearly dropped the glass when he found Frisk laying there with her shirt off, thrown to the side, leaving her bra in full view.

"Why...did you take your shirt off?" Sans asked as he brought the glass over.

"I was hot...water?" She said, her voice slightly slurred. She reached for it, but Sans held it back.

"Sit up first, I don't want you to spill it all over yourself." Sans said. Frisk sat up, still reaching out for the water. Sans finally handed it over, and she greedily began to chug it as Sans sat down on a nearby chair. Sans looked over at her, and his eyes subconsciously shifted to her very visible cleavage that her deep red bra showed off. She...sure had grown over the years…

Sans shook his head, feeling a burn in his face. He hated that he was able to blush, an uncommon feature among monsters. Once Frisk was done, she sat the glass down on the side table next to her. She sat there for a while breathing heavily, her hands fidgeting.

"You okay now?" Sans asked, and Frisk shook her head.

"I still feel hot." She said.

"Let me turn down the thermostat." Sans suggested, and stood up, walking over to the small device on the wall. He knew Toriel didn't like people messing with it, but he could always turn it back up later, and even then, he could explain why he'd turned it down.

As he was adjusting it, he heard the rustle of clothes behind him, and turned around. He had to suppress a gasp as he saw Frisk's shorts drop to her ankles, and she stepped out of them, flinging them aside. She was left standing in just her underwear, and Sans gulped as he stared at her matching red panties. He shook his head to clear the bad thoughts away.

"Wh-what are you doing?" He asked.

"Getting more comfortable." She said with a smile as she flopped back down. Sans walked over and sat back down, looking towards the side table of his seat to grab the remote. Maybe some TV would help them both. But it was then that he got a glance towards Frisk, and he nearly dropped the remote. She was laying on her back, her legs spread slightly, showing off the thin fabric between her legs that was the only thing between the outside world and her...her...privates.

Sans quickly looked away, and turned on the TV to a random channel. He sat down the remote, and saw out of the corner of his eye that Frisk had turned her attention to it as well. Unfortunately, after doing that, he looked at her side-eyed, and his gaze drifted to her face. She had a dreamy smile on her face, due to her intoxication. Sans studied her lips, small and thin. They looked so...small, and fragile.

Before he knew it, Sans' eyes had drifted down to her chest again, where he could see the faint outline of two bumps on either side. The two mounds rose and fell with her breathing, and Sans felt his head swimming. When he realized he was staring, he pulled his gaze back to the TV, where it was playing some random comedy.

A few minutes passed in silence, and Sans was actually getting kind of invested. The main guy, as usual in these sorts of shows, was trying to get close to the girl, but was doing it in the most roundabout way possible. He was so into it that he jumped when Frisk spoke.

"Sans?"

"Yeah, k-" Sans had to stop himself. Frisk had been trying to get him to stop calling her 'kid'. She appreciated the nickname, but she had told him it made her feel, well, like a child. Sure, Sans was technically older than her, but still. So he'd made an effort to try to stop calling her that. "Um, yeah?"

"Come hereeee…" she said, and held out her arms like she wanted a hug. Sans felt a sense of dread as he slowly stood up and started walking over. When he was close enough, she suddenly grabbed his hand and pulled him down. He fell on top of her, and his face became buried in her chest, right between the two modest mounds. As he felt their softness against his face, he felt an intense blush cover his own. "Mmmmm~" Frisk cooed, and gently rubbed Sans' head, giving him shivers. Being this close made him super uncomfortable, yet it also felt strangely welcoming.

"F-Frisk, I'm in your—mmph!" Sans tried to speak, but Frisk simply shoved his head even more against her chest. All Sans could see now was skin. He became acutely aware of how close his knee was to the spot between her legs, and was trying hard not to make contact. Sans was able to pry away enough to see her face. She still had that dreamy smile, but as she stared back at him, there was something else in her eyes that he couldn't quite identify…

"Do skeletons have dicks?"

Sans' face exploded in heat at the question, and tried once again to get away, to no avail. The look on her face indicated that she was seriously asking.

"W-well…" Sans stuttered, "w-we don't necessarily have one of our own, but we can...create one with magic."

"I seeeee…" Frisk said, stretching out the word in a weirdly cute way. "Does that mean you feel everything like a normal dick does?"

"Well...I, uh...haven't really had to use it myself, but I believe so." Sans answered. He knew that if he did have said dick, it would definitely be hard right now.

"Hmmmmm…" Frisk said. The room was filled with silence, other than the show on TV, but it didn't last long. "Hey Sans?"

"Yeah?"

"Would you rather be on top, or bottom?"

This time, it took Sans a moment to understand, but once he did, he felt another shiver. Why was she asking something like that? "I...I don't know...I don't have experience in that sort of thing."

"I see...personally, I wanna be on top~" she said. There was another pause, but it was even shorter than the last one. "Saaannnnssss?"

"Yeaaaaahhhhh?"

"Do you know how awesome you are?"

That one definitely caught Sans by surprise, and he stared back at her, his silence conveying all she needed.

"I think you're really cool. You're nice, you're honest, you're helpful, helping me come home and giving up the chance to see everyone…" she said, and Sans felt his blush returning for a different reason. "I just...admire you a lot, ya know?"

"Well...thank you." Sans said. "I admire you too, you know. It takes a lot to have the kind of bravery and perseverance you had in the underground."

"No, I had determination. Bravery and perseverance were some of the other kids, I think." Frisk said. Sans laughed, and Frisk stared at him for a moment before shrugging. "I just...never gave up. I'm sure you would be the same."

"Nah, I'm too lazy." Sans said, this time making Frisk laugh. Her laugh was so pure and full of life that Sans couldn't help but smile wide when he heard it. Then, suddenly, Frisk's expression changed. Her eyes narrowed, and her cheeks became flushed.

"I...admire you a lot, and that admiration has only...grown over the years…" she said. Sans was starting to feel that dread again. "I...always wanted to...show you…" Before Sans could ask what she meant, she suddenly grabbed him tightly and flipped him over so he was laying on his back. She moved around until she was looking down at him, her arms on either side of his head.

"F-Frisk?" Sans said, and Frisk licked her lips. She sat up, sitting down onto Sans' waist. He could feel her ass against him even through his clothes and her panties. His eyes went wide as she reached behind her back and started undoing her bra.

"W-woah, wait a second-" Sans said, trying to grab her hands to stop her, but she leaned away out of his grasp. "I'm not sure I-"

"I am sure, though." Frisk said, cutting him off. He saw the bra loosen as she finished undoing the back, and she slowly slipped the straps down her shoulders. The only thing keeping the bra on her body was her hands holding it in place. She winked at him and pulled the bra away, flinging it over near her other clothes. Sans was unable to suppress his gasp this time as he gazed upon her now exposed chest.

Her breasts weren't the biggest, but Sans never really had a preference as far as he could tell—not many monsters had anything similar, anyway. Even so, the sight of her firm, pale mounds topped by small pink nipples made him shiver again, his entire body shuddering. Yeah, he'd definitely be hard.

"I...I want this...I want...you…" she said as she leaned down once more, until her face was inches away from his. Her breasts made contact with his jacket, and he could feel their softness through the fabric. She looked him directly in the eyes, and Sans was surprised to see...weakness. Vulnerability. She was...nervous. Despite her forwardness, she was nervous...about him?

"Why?" He asked. "I'm...not really as good as you think I am…" Frisk shook her head.

"No...you're way better than you think you are...trust me." Sans didn't know why, but there was something in her eyes again...something that conveyed so much. He didn't know what it was, but he believed her. "I...can stop if you don't want to do anything…" she said, disappointment in her voice. Sans was silent for a few moments, and when Frisk seemed to take that as a no, she sat up, and was about to get off of him when he suddenly flung himself up. Her eyes widened in surprise as threw her down and got on top again, pinning her arms to the couch. Her hair became splayed out, and her breasts fell slightly to the side, falling to the effects of gravity. She looked up at him with confusion, but also hope.

"I...want this too…" he said softly, and to prove it, he leaned down, closed his eyes, and embraced her in a kiss. He didn't really have lips, so he was afraid she wouldn't like it, but he was pleasantly surprised when almost immediately after they touched, she kissed him back with just as much passion. Just as he thought, her lips felt delicate and soft, and so warm. He wasn't sure how long they were locked in that position before Sans finally forced himself away, and opened his eyes. Frisk's lips were still parted for a moment as she too opened her eyes.

"That...that was…" she said softly. "That...was my first kiss…" Sans smiled down at her.

"Mine too." He said. She giggled, and then blushed as her eyes flickered downward. He followed her eyes, which were glancing at her panties. He looked up at her, and she looked away, her face flushed. "Can I?" He asked, and she took a second before nodding. He nodded back, and he crawled away to get better access, moving until he was at her waist. He stared down at her panties, and noticed a dark spot at her crotch. He reached for it, and gently put his finger against it. Frisk lurched, and Sans found the spot to also be damp. He rubbed the spot, and her body shuddered under his fingers.

Sans took a deep breath, before hooking his thumbs into her waistband, and gently pulled down her panties. No pubic hair showed up as he pulled them down, and it didn't take long before it appeared. Two lips closed up, protecting the treasure within. It was so smooth looking down there. Her inner thighs were coated in a sticky substance, and as he pulled her panties down further, he looked up to see her covering her face with her hands. He could see the blush having spread to her ears even. He continued pulling the panties down until they were completely off her body. They soon joined her other clothes. Sans sat up and looked down at Frisk.

The sight of her laying down in front of him, not a single stitch of clothing covering her body, gave him a tingle over his entire body. Sure, he'd noticed her body developing as she'd grown up, but...seeing it like this was truly breathtaking.

"H-how...how do I look?" Frisk asked through her hands, peeking out between her fingers to look at his expression. He smiled at her.

"Absolutely beautiful~" he answered, and she squealed a bit as she completely covered her face again. Sans looked down at her, and froze. Now what? "Um...Frisk?" Frisk peeled out between her fingers again. "I'm...not sure what to do next…" She stared at him for a bit before she giggled, and finally pulled her hands away from her face, revealing a blush that covered her entire face. The sight of it made Sans' own blush grow.

Frisk gently reached over and grabbed one of his hands and brought it up to her chest, placing it over her breast. Sans gasped as he was shocked by just how soft it felt under his fingers. She let go of his hand, and he caressed the breast, almost hypnotized by how it felt. His fingers brushed over her hard nipple, and Frisk shuddered. Sans closed his hand, and his finger sunk down into her flesh as he squeezed it.

"Mmmm~!" Frisk moaned, which sent shivers down Sans' spine. Sans reached up with his other hand and grabbed her other breast, and squeezed it as well. He massaged them, moving them around in different directions, simply examining how they moved around.

"S-Sans…" Frisk moaned his name, and Sans felt something within him stirring. Was that arousal? It was different for monsters than for humans, so he wasn't entirely sure. "Put...your hand...down…" she breathed, and Sans understood. He removed a hand from one of her breasts and moved it down to where he pussy sat. As soon as he made contact, he could feel the wetness exuding from it. It was very warm.

"What now?" Sans asked.

"Just...rub it…" she said quietly. Sans nodded and ran a finger across her lower lips, and Frisk moaned loudly. Sans could feel her juices spread across his finger as he rubbed up and down her lips, then moved to the slit between them. Her body raised up as he rubbed it, arching and bringing it even closer to him.

"Do my fingers feel...weird?" Sans asked. He was afraid that his fingers being literally nothing but bone would make it uncomfortable for her. She shook her head, and Sans smiled. As he was gently stroking her pussy, his finger accidentally slipped inside.

"Ahhhhh~!" Frisk cried out, and Sans quickly pulled his finger out.

"I-I'm sorry, I-"

"N-no...that's what you're supposed to do…" Frisk said, and gave him a smile to reassure him. Sans smiled back and he brought his hand back to her pussy. He used his finger to hold open the lips, allowing to see the fleshy, pink inside. He thrust his middle finger inside, and Frisk gasped, but this time, he didn't take it as a bad thing. Instead, he moved it in deeper and deeper, until he reached a point where he couldn't go any further. Her warm inner walls pressed tightly around his finger. He didn't exactly know what to do next, but he had a guess. Sans pulled his finger out and then thrust it back inside. Her body lurched as he did, making her breasts jiggle a bit.

He continued thrusting his finger in and out, relishing in the squelching noises, as well as the moans Frisk she made. Her warm juices coated his finger now.

"S-Sans!" She cried out. He looked up, and saw drool falling down her chin. "I...I want you...inside!" Sans knew what she meant, but he'd never really tried to conjure up a dick for himself before, and wasn't entirely sure how it would turn out. The hesitation must've been evident on his face, as Frisk gave her puppy dog eyes that struck him right down to his soul. He took a deep breath, removed his finger from her pussy, closed his eyes, and concentrated.

He felt his magic bend around his body, swirling around like an invisible mist. He reached out with his mind and grabbed onto a thick mass of that magic, and brought it down towards his crotch. He connected it to himself, and used his thoughts to shape it into the form he desired...and suddenly, Sans' body lurched as he felt it. He'd done it. It was there.

"Oooooooo!" Frisk cooed as she sat up and grabbed at his shorts. Before Sans could stop her, she had pulled them down, and it popped out. It was already erect, having been tied to his arousal, and was a bright blue. Frisk stared at it, and gulped. "H-hey Sans? Do you think you can make it a bit...smaller?" Sans looked down at it.

It seemed to be about 7 inches long, larger than he'd intended. He laughed and nodded. He closed his eyes once more, and focused on removing part of it. At the same time, he heard Frisk gasp as he felt it shrink. He managed to bring it down to 5 inches instead, which he hoped would make her happy.

"Is that better?" He asked, and Frisk nodded with a smile. She studied it intensely, tilting her head to look around at it. Sans couldn't help but blush at her fascination, and he jumped when she suddenly poked it.

"Ah, sorry!" Frisk said, and withdrew her hand. That hand stopped at her chest, then slowly moved downward. It moved over her stomach and stopped at her pussy, which was still dripping wet. She spread her lips and lifted her hips up, smiling slyly, inviting him in. He gulped and he sat up and bit, moving closer. He put his hands on her thighs to help steady himself. When the head of his dick touched her lips, they both gasped.

"Oh my god-!" He said. He hadn't even done anything yet and it felt this good! Sans took a deep breath, and suddenly shoved himself deep inside her.

"Ahhhhh!" Frisk cried out, wincing.

"S-sorry!" Sans said as he started to pull out, but she shook her head, and gave him a reassuring smile.

"I-It was just so sudden…" she explained. "Also, Sans...you just took my virginity~" Sans' face exploded into heat, and before he could stop himself, he shoved himself all the way inside her, all the way to the base. She cried out in pain, her body lurching. Sans also gasped as he felt her inner walls press tightly against his hard shaft. Their combined warmth spread through Sans' entire body.

Sans slowly pulled out, and then moved back in, thrusting deep inside once more. As his shaft slid against her wet lips, it was a sensation unlike anything he'd experienced before, and it felt like every part of his body was shaking, which it might've been.

He started to speed up his thrusts, and every time he shoved himself against her, Frisk's body lurched, making her breasts jiggle in a beautiful way. It felt like the dick was vibrating inside her, and it just added to the overall amazing sensation he was feeling. He could feel pressure building inside him.

"S-Sans-!" Frisk suddenly cried out, and he felt invigorated by hearing his name, so he went even faster. Their hips crashed together as he went in and out of her. Sans felt like their souls were merging just as their bodies were. He felt connected to her in every way possible. He felt...alive.

"Sans, I'm-!" Frisk cried out, and she gasped and her body bucked as a sticky fluid suddenly erupted from her pussy, covering his pelvis. Sans continued thrusting as her cum came out in waves. Even before she had finished, he also felt the pressure build to a breaking point, and he came as well, filling up her insides with pure magic as it flowed out from the head of his conjured penis. It quickly filled her up and started to leak out of the sides, mixing with her own cum in an almost poetic fashion. Once they had both completely finished, Sans collapsed onto Frisk, and both laid there panting.

"Wow…." Frisk said, her voice low. "That was...that was…"

"Incredible? Amazing? Spectacular? The greatest thing you've ever experienced?" Sans offered.

"Yes, to all of them." Frisk said with a dreamy smile. Sans smiled back, and laid his head against her chest, feeling comforted by the enveloping softness of her mounds. He simply laid there and listened to her breathing as it began to slow. Eventually, it reached a point where he could tell she was asleep. She deserved the rest. Sans, also exhausted, listened to the nonsense on the TV as his eyes fluttered closed, and he drifted off into a peaceful sleep…

That is, until he was awoken by the door opening.

When it opened, Sans' eyes shot open, and he felt his left glow blue in panic. He only had time to register Toriel's voice calling out Frisk's name before Sans teleported him and Frisk to Frisk's room. Sans quickly jumped to his feet and grabbed the blankets. He threw them aside and gently picked up Frisk before setting her down on the bed. As Sans heard footsteps coming up the stairs, he looked down at her. She was still a mess, her inner thighs covered in her own sticky fluid, but he didn't have time to fix it right now. He threw the blanket back over her, until everything but her head was covered. Satisfied, he turned and was about to leave the room when he stopped. He turned back to Frisk.

She looked so peaceful deep in her slumber. The blankets moved ever so slightly with her breathing, and her breath came out in a soft whisper. Sans couldn't help but smile. He walked over to her, knelt down, and planted a kiss on her forehead. Perhaps sensing the kiss even through her sleep, her lips curled into a slight smile. Sans finally turned and left the room.

He stepped out just as Toriel rounded the hallway's corner. "Oh, Sans!"

"Hey, Tori." He said as nonchalantly as he could. "How was it?"

"Ah, it was so nice getting to have fun with everyone. I'm sorry you couldn't stay long." Toriel said. "How is she?"

"Passed out, like a rock." Sans said with a laugh. "Probably should leave her alone." Toriel nodded, and smiled.

"We took lots of pictures, we can show her in the morning." Toriel said. "I'm going to bed though, I'm exhausted." She gave Sans a small nod before she walked into her bedroom and shut the door behind her. Sans waited a count of three before he let out a deep sigh.

That was close.

Sans quickly, but quietly, made his way downstairs, and got to gathering up Frisk's clothes. It seemed Toriel hadn't seen them, or else she definitely would've questioned it, especially the underwear. He went back upstairs, and set the clothes down on the bed next to her. He gave one last look at her peaceful smile.

"Goodnight, Frisk." He said, and he teleported away into the night.