Sans AU One-Shots

❀Killer❀ || hall pass.

Pairing: Killer Sans x Female Reader
Prompt: Y/n is stuck in a relationship where she feels unloved, and in response, her lover gives her a 'hall pass'. What she doesn't expect is to actually use it.
Type: smut
Length: 11k words
Background: Canonically, Nightmare and Killer are the only two confirmed to be in Night's castle, so Horror and Dust aren't in this one. | I don't adhere to Killer's canonically romantic side nearly enough, so enjoy some of that too ☕
Notes: Based on my experience with a toxic ex where I was made to feel bad about asking to be loved. I spent months crying and begging for him to just show me he loved me, and nothing ever changed. If they want to, they will, but if you're not a priority to them, you'll feel it. Also takes inspiration from a recent attempt at getting back into the dating world... Stick to your boundaries, kids. If you let someone walk all over them, that's not the worst they'll do. | Unreliable narrator Y/n, rationalization of toxicity to blame the victim, not the perpetrator, and an inside look into what could push someone into cheating when the pain of a loveless relationship just never ends & break-up doesn't feel like an option. This is all a fun way to ring in 2025, ironically, by helping you realize your own worth and encouraging you to seek a partner that will treat you well (like a New Year's resolution lol) because the stuff I have planned to write next isn't nearly so wholesome... 

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I tapped my foot, glancing down at my watch every couple minutes like I expected my vision to be so clouded by disappointment that I read the numbers wrong. But no, it was the exact time I thought it was: my boyfriend was late. I sighed, getting up from my seat at the dinner table to start pacing. If all went well, Maximilian was supposed to be home an hour ago – he was supposed to wrap up his work early so we could spend some quality time together. I'd never seen time as a luxury until I met Max, and every second I got with him had to be planned a month in advance. What had started off as a spontaneous love had turned into monotony, where every date had to be planned and budgeted around his busy schedule, and where I came second to his work – if I even still had my second place title.

I heard the front door open and turned expectantly, heart squeezing in my chest when I heard my boyfriend's voice from the other room. I could tell immediately he was talking to someone on the phone – he had a way of speaking to clients or wealthy donors I could recognize instantly, though nowadays that same tone extended to me, too. His shoes thudded against the ground as he removed them before heading into the kitchen, where he saw me beside our empty table with my arms crossed.

He sighed silently at the look on my face but held up a finger when I opened my mouth, reassuring whoever was on the phone that he'd get it done without any delays as I tried to speak. "Max-"

"I promise you it'll get done. Am I not a man of my word?"

"Max-" I stepped toward him and he held up a hand.

"Yes, I'm aware of where I would be without you, but you just need to give me more time-"

"Maximilian!" The glare he leveled me with made my heart ache and I froze, wide eyes watching him turn away so he could continue the call unperturbed. I fiddled with my hands, wondering why the ache was spreading throughout my whole chest when his anger wasn't directly pointed at me anymore, but in the time it took Max to finally end the call, I figured it out. The look of hatred in his eyes had faded away by the time he turned back to me, but that lingering sear of heat where his glare touched me tingled on my skin like he left scorch marks.

"Sorry about that." He tried to smile but it looked tired, and he slid the phone into his back pocket as he stepped toward me to place a chaste kiss on my cheek.

I let him even as my stomach churned uncomfortably, but I plastered on a smile anyway. "Who was it?"

"Nightmare, he wants-" Max cut himself off with a click of his tongue, hand reflexively drifting back towards his phone but he didn't grab it. "It doesn't matter, but he's threatening to take away my position as mayor if I don't give it to him soon." Nightmare – an otherworldly skeleton with far-reaching influence and nefarious purposes – was the entire reason Maximilian was in the position he was, and to maintain that position, Nightmare asked of him miscellaneous tasks. I couldn't fault Max for complying, but the wicked demands had stopped being subtle altogether recently and that unnerved me, like the tension between them had changed and I was caught in the middle of something I wanted no part of.