A Generic Sanscest one shots!

Nightmare smut

Ao3 request, the title is very self explanatory but here: tentacle advisory divine blast!!!!

The window was open, the curtains swaying from the breeze that passed through the screen barrier that prevented most bugs from getting into the castle. The castle was silent, all except from the sound of footsteps and the very old staircase. It's a wonder how nobody has fallen down those, they are much too steep to be made for skeletons..or something like a skeleton. Maybe it was for some sort of giant that once existed, after all Nightmare just stumbled his way inside uninvited like an anti-vampire and decided to call it his lair.
Speaking of which, Nightmare was making his way upstairs.
          Everyone else was asleep, having been worn out previously from missions. This godforsaken castle did not have AC or a heater, no matter how hard they tried to install something like that it wouldn't work..so the summers here were awful..and the winters were nothing short of freezing. it was a breezy summer night and nightmare was now in his bed, the blankets kicked to the bottom of the bed as if they were being punished for this horrible horrible warmth that killed the air.
   He couldn't sleep and he didn't want to do work, so he came up with a solution: Reading from his stash of forbidden books. The only reason it was forbidden is because, well, to put it shortly..if the others found them he would be embarrassed out of his mind. Especially since he didn't quite come off as the type to be interested in these things. Mostly because of how he acts towards romance stuff. He only had one relationship and that ended..interestingly.
        He huffed, climbing underneath his bed and pulling out a massive box out from there. He rummaged through the books, pulling out the first. He scuttled back onto the bed, laying down and beginning to read. His mind always tended to wander, his imagination tending to land on people he knew.. whether he hated or loved them. It was certainly a feeling when you started to imagine yourself with enemies..like this one time with ink- he couldn't look ink in the eyes for a little while. He was just as dirty minded as everyone else, not a utter prude as they've usually assumed.
    His tentacles twitched, swishing back and forth as he kicked his legs and kept reading. A tentacle wormed its way under his pants, slinking and slithering up the pants leg. Nightmare shuddered, his attention being pulled out from his book. He groaned, pulling the tentacle away roughly. Sometimes, it was nice that they could behave independently, other times..a complete and utter nuisance!
      He kept reading, eventually a tentacle made it's way inside. It was cold and slimy, he couldn't help but shudder at the way it twisted and moves. "Will you stop that!" He tried to pull it out, exasperated and embarrassed but to no avail. it was persistent. In a matter of moments he found himself writhing from the thick tentacles imbedded in him. The sound of fabric from the sheets clashing with his shirt emitted a scuffling noise, nightmare digging his fingers into the sheets.
   He breathed heavily, the air felt so hot around him. He gave in, letting himself get more comfortable as it squirmed and wriggled around. He now lay on his bed, ass up in the air and... probably what can be horribly described as downward dog or that stupid yoga pose. Do you really expect nightmare to do yoga? No matter how much yoga he could potentially do, it ain't going to fix his back problems so why try? He tried to focus a bit more on the book, his mind imagining the scenarios that were going on in them.. except with him and other people he knew.
      Error, ink, killer, swap; these were all people he has already imagined stuff about previously. God, this is a special kind of hell ain't it? Maybe this was repentance for his crimes, having his guts rearranged by hid own extremities sounds like a pretty interesting punishment. It's definitely not for the weak though, especially not if you're a negative creature that thrives off negativity. The worst kind of positive feedback loop has been cast upon him; a tentacle gets a bit too ambitious? Pleasure. What is pleasure technically apart of? Positivity. What does positivity do to nightmare? Hurts him.
    And over the cycle continues, nipping away at his HP. However, he wasn't going to deny that it felt good, he was evil but not a compulsive liar, onlyaboutcertaintopics but still! He's villainous with standards, why can't villains have standards? Everyone's such a critic. He buried his face into the sheets, feeling as if something was twisting and winding around inside himself, squirming and worming its way into every crevice of his body. He took shakey breaths, silently praying that he finishes sooner rather than later for how... scandalous this all looked. He is a king, how dare his own extremities have him all crumpled up like feeble origami.
   How embarrassing, but yet, in a way, every good king must fall. This must be one helluva way to fall then, jeez. He had a little too much pride to admit that he sorta enjoyed all this, he hasn't been touched like this ever since he and ccino split. For good reasons of course- well for ccino anyways, nightmare always saw it as traitorous behavior, that his ex was backstabbing him despite how obviously brutal he was with him. His legs trembled, he felt the warmth reaching new depths, god it hurts like hell but it did feel so Divine. He put a hand over his mouth, it felt like a fire was being lit inside and spreading all over his body, writhing, squirming, escaping.
         He'd need to be quiet more than anything now. Everyone is sleeping, or he's under the impression they are, they are adults, they can go to sleep by themselves. If they don't, he is not liable for their irresponsibility. He was almost done, he could feel it coming. He wouldn't really hold up for much longer, he could lie to himself all he wanted to but that wouldn't end up well since he'd just be sitting there disappointed afterwards for lying to himself.
     His breath caught in his throat, feeling one of the tentacles practically jam in there, it caught him by surprise, letting out a swear under his breath. Next thing he knew, he was laying on the bed, nothing but a sticky mess being left between his legs, all of his tentacles had tired out. He groaned, not particularly appreciative of the mess he made.
     He went into the little side bathroom, taking a damp wash cloth and running it over between his legs. He could already feel the sleepiness settling in. As soon as his head hit the soft pillows he was fast asleep, his tentacles curling themselves around him.

The end

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