Sans AU One-Shots

❀Nightmare❀ || saturday. (HG)

Pairing: Demon King! Nightmare Sans x Summoner! Female Reader
Prompt: It's the demons' heat week, and (Y/n) offered to help them out with their urges. What she didn't realize was she'd be helping their enemy, too...
Type: smut
Length: 4.9k words
Background: This was in Her Guardian as part of a spicy week-long bonus thing where each of the guys got a day of the week with Y/n to claim her. The goal of the heat week is procreation (i.e. making babies) and after mating, the heat urges go away. | Takes place on Saturday - the last day of their heat (thus the most intense) and after everyone else's - but it branches off so in this scenario: Dream's never happened and Nightmare's took its place & happened instead
Notes: Lucky Y/n - or unlucky in this case. Them being a demon only changes how tall they are (at/over 6'4"), their power (they're much stronger than humans), and how they see Y/n (among other things I explore in my full-length story that aren't relevant for this smut-shot). I tried to remove any information that pertains to the events of Her Guardian so you can read this as a stand-alone story and understand everything.
SOMETHING TO NOTE: Nightmare is Y/n's enemy so they're on opposing sides and his goal is to kidnap & bring her to the bad guy (his human boss). But I like including nods to His Summoner so his mate is the Y/n of his book (HS), and Dream's Y/n looks just like her/shares her name because obviously they're both you. So if that's confusing: there's two Y/ns that look exactly the same, one was Nightmare's mate and the other is Dream's, and you're the Her Guardian one/Dream's for this smut-shot

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(Y/n) relaxed in the bathtub, running her hands through her (h/c) hair to spread the shampoo through the strands before sinking under the water to wash it out. With every demon satisfied save for the one that claimed he wouldn't give in to his urges because she wasn't his mate, she felt a long soak in the bath was the perfect way to round out the week—even if she would've preferred Dream realized they were made for each other instead of rejecting her. It was getting frustrating to have the truth in bright neon lights yet he continued to close his eyes and pretend he couldn't see it, and she was getting sick of it. She loved him, quite bluntly, but while she could understand his reasons, that didn't make it any easier on her heart. She just wished there was some way to get him to see that what he was looking for was right in front of him.

(Y/n) emerged from the water with a deep sigh, resting her head back on the edge of the tub. A deep chuckle made her head snap up in surprise to see Dream standing beside her, his smirk wide and yellow eyelights gleaming like he was looking at prey. She shivered, trying to hide her unease with a smile. "Hey Dream, what's up?" She pulled some bubbles floating on the surface of the water over to cover her body, his normally positive aura all but missing due to the heat, and it made her shudder as she avoided his gaze.

"I assumed you would be wrapped in an intimate embrace during this week, yet here you are all alone." He adjusted his gloves so they were pulled higher up his arms, each word delivered with a mocking edge. "Do not tell me the others have refused to touch you on some skewed grounds of morality."

She frowned, sitting up in the tub to look him in the eyelights. "I already helped them earlier this week. You didn't hear?"

"I am afraid I did not." He looped his thumbs through his belt, gaze slowly slinking up her body.

She blushed and cleared her throat, hesitantly meeting his eyelights. "Were you coming up here to ask me to help you out?" Her heart beat faster, wondering if she really got him to crack just by waiting until the last day of their heat, and his grin stretched wide.

"As a matter of fact, yes, I would love if you could help me out, angelus." He extended a hand to her and she took it, tilting her head.

"'Angel'?" 'Angelus' was 'angel' in Latin.