Happy Halloween, dear readers! I hope you enjoy!

(Reader and Sans are already a couple. Also, I'm sorry for the late and short post.)

~Music playing in the background~
[This is Halloween]

"Boys and girls of every age, wouldn't you like to see something strange?" The girl sang as she walked through Snowdin with her (Sally/Jack Skellington) costume on. Sans noticed the girl and looked at her confused. He then lazily strolled over to the girl, tapping her shoulder. Feeling someone tap her arm, she squeaked and blushed from embarrassment. "S-Sans, what're you doing out here? I th-thought you were with Papyrus?" Sans shook his head, chuckling silently to himself.

"Nah, Paps is training with Undyne for a while." The girl nodded. "Hey, sweetheart? What's all over yer face?" (Y/N) giggles. "It's face paint! Tonight, I believe, is Halloween on the surface! We dress up like creatures of the darkness, or our favorite characters from different things." She explained with pure enthusiasm. Sans smiled at her excitement. "I'm dressed as (Sally/Jack Skellington)! (S)He is from the movie, The Nightmare Before Christmas." She pointed out. The lazy skeleton tilted his head in confusion. "What?"

(Y/N) gasped. "You don't know what Nightmare Before Christmas is?!?!" Sans flinched from her sudden outburst. "Jeez, sweetheart, calm down. It's not the end of the world." Being overdramatic, (Y/N) gasped even louder than before. "Not the end of the world? Sans, you've never seen one of the greatest claymation works in the world and on Halloween too!" Sans shrugged. "I've never heard of it."

(Y/N) then quickly grabbed Sans' hand and sprint to his house. "Y'know, sweetheart, I could have used my shortcuts to get here, right?" The girl ignored her friend and began to set up the movie into his TV. "Sans?" He turned his skull to look at the excited girl. "Yeah?" She then smiled genuinely at him. "Are you ready for my spooky scary skeley boy, Jack?" The expression on his skull turned priceless. "What?" (Y/N) laughed and shook her head. "Jack Skellington, also known as the Pumpkin King."

After (Y/N) decided to start the movie, after messing around with Sans, she began to sing along to the first song. "Boys and girls of every age, wouldn't you like to see something strange? Come with us and you will see. This our town of Halloween. THIS IS HALLOWEEN! THIS IS HALLOWEEN! Pumpkins scream in the dead of night. THIS IS HALLOWEEN!" She sang with all her might, smiling as she did so. Sans just chuckled and watched her, and the movie, as the song continued.

"I am the one hiding under your bed, teeth ground sharp and eyes glowing red! I am the one hiding under your stairs, fingers like snakes and spiders in my hair!" The beings sang, causing Sans to watch closely at the TV. 'Is this what humans think we look like?' He shrugged and kept watching, mainly watching the strange girl singing along.

~Time Skip~

By the end of the movie, (Y/N) had some how gotten Sans to fall in love with the movie. He liked how genuinely kind Jack ended up being, as well as how sweet Sally was throughout the movie. Before either of them got up, Sans hugged the girl laying next to him, putting his head gently on hers.

"Thanks for the movie night, (Y/N). I really enjoyed it." He said, smiling. (Y/N) nodded. "Of course! I'm glad you liked it!" She said with a smile. They then both heard Papyrus, who had came home a half hour into the movie, humming while he's finishing his spaghetti in the kitchen. "We should do this more often, (Y/N)." The girl nodded. "Of course!"

She then looked down at her phone, only to notice what time it was. "Crap, Goat Mom's gonna be worried if I don't head home soon. Sorry." She said, slowly getting big up from the all to comfortable couch. "Don't sweat it, (Y/N). I'm glad I could spend more time with you." (Y/N) blushed and lightly nudged Sans. "Your embarrassing me." She said hiding her face.

Sans chuckled, hugging her once more. "I'll let you go if you promise to spend tomorrow with me?" (Y/N) smiled and nodded. "Deal." He then went to let her go, only for her to peck his cheekbone with her lips and sprint out the door. "Heh, she's something else. Open and crazy one moment, shy the next."