Warning- sexual content
There were no words to describe the feeling that spread throughout your body. All the years you spend studying, all that time wasted with your head jammed into various books, and you still couldn't put your finger on the word to describe how you felt.
Lord Muzan laid you on your back, looking atop of you. His plum red eyes seemingly glowed in the dark, smoldering and almost scary as he stared you down, various loose curls hanging down around his defined face.
Leaning down, his cold lips made contact with your burning lips, his sharp teeth delicately pulling on your bottom lip. A soft hum escaped your mouth, and you opened your mouth instinctively, allowing him free reign. You arched your back, your legs bending and subconsciously gripping around Kibutsuji's waist. He pulled back after several minutes of this, a smirk across his lips as he ghosted wet kisses along your cheek, jaw and neck, pulling at the collar of your blouse. Each kiss arched your back more, soft hums of want filling the air. Finally,Kibutsuji's large, strong hand made contact with your hip, pushing you down into the bed.
"Slow down, Seiza," he chuckled darkly, pulling back and staring down at your half lidded eyes, full of want. "We have all night."
Your stomach flopped at this proposition, but you were still eager. You loved the man before you, and while you were more than excited to spend an entire night with him, you couldn't help but want to speed up the process. These thoughts made him chuckle again, and he shook his head, crawling back down your body and gently untucking your shirt from your skirt, lowering his head to your abdomen.
"Such an impatient women you've grown to be," he chastised, his cold breath fanning across your stomach as you gasped lightly, your eyes wide and focused on the ceiling. You could almost swear he could hear the flapping of the butterflies in your stomach.
"You make it very hard to wait patiently," you answered back breathlessly, and you let Kibutsuji smile against your skin, before he planted several kisses across your stomach, following the hem of your shirt as he lifted it higher.
"Sit up, Seiza," he commanded, and you did as told, even raising your arms as he lifted your shirt over your shoulders. His plum red eyes grazed across your body for several seconds before his hands reached behind your back, unclamping your bra and pulling it off of you, discarding it on the floor beside you both. Instinctively, your arms crossed against your chest, your cheeks blooming a bright red and your eyes averting from his. Kibutsuji sighed, gently taking your hand and kissing your palm, before grabbing your other hand and kissing that one as well, leaving a static-like sensation.
"Honestly," he sighed, pushing you gently on your back once again, shaking his head lightly. "As if you have anything to be insecure about," he scoffed, kissing your lips tenderly before working his way down your jaw and neck again, this time stopping just short of your collarbone before gazing up at your flushed face.
It was so beautiful to him. Your eyebrows upturned in impatience, cheeks flushed in anticipation, sweat on your brow from nervousness. Your chest heaved underneath him, your heart pitter pattering underneath him like a hummingbird. He would show you how sweet sugar water could truly be.
His lips graced across your skin over your nipple, causing an electric shock and a sharp gasp to escape your lips involuntarily. He nudged it again with his lips, parting them just enough for his tongue to make contact with your nipple, and you bit your lip hastily, attempting to hold back the quick gasps he was enticing from you.
His other hand made steady work of kneading your breast, your nipple between his two fingers as he pinched and flicked gently. You squirmed beneath him, desperate to rub your knees together, but Kibutsuji stayed still between four legs.
Once he had enough, he lowered his hands to the side of your lip, easily unzipping your skirt. You obeyed wordlessly, lofting your hips as he discarded your skirt and underwear in one swoop. You were completely exposed before him, laid bare. Somehow, your face got hotter, watching him examine you closely in such an intimate way.
"Calm down," he muttered shaking his head lightly with a 'tsk.' "You're far too anxious, Seiza. Enjoy this."
His suggestion went in one ear and out the other as his face lowered to your core, your eyes locked in one another as yours widened considerably. He kissed along your inner thigh, watching you lick your lips and bite them, tears welling in tour eyes. He chuckled, his breath tickling your thigh.
Moving centrally, he nudged against your sex, and you jerked considerably, a loud breath exhaling from your mouth. Kibutsuji immediately grabbed onto the front of your thighs, anchoring you into place as he began a slow and steady rhythm in your clit, plum red eyes watching your every reaction carefully.
At first he was gentle, but over time he grew ruthless and unrelenting, your back arching and your legs shaking, toes curled tight. Once you relaxed, you opened your eyes to see him looming over you once again, smirking at you as he bent down to kiss you. On his lips was an odd taste, and tour mind was so hazy you didn't put two and two together until he spoke.
"How do you taste, Seiza? I find it... irresistible."
Your cheeks heat up and you looked away, embarrassed as you covered four mouth. Anticipating this reaction, Kibutsuji maintained his smirk, finally beginning to undress himself. He regained tour attention quick with this, and you found yourself admiring his build rather fast.
He was slim, though muscular, almost every muscle perfectly designed across his body. When he began to unbuckle his belt, you lifted your eyes to the ceiling, rubbing your thighs together in an attempt to relieve the heat and throbbing that was building back up from your release earlier.
"Come now." He murmured, and you turned, timidly opening your legs for him as he crawled in top of you. He kissed your forehead, your cheeks, your nose, and your lip before speaking again. "This will hurt, but it won't last. Endure it for me, love."
And with a painstakingly slow motion, Kibutsuji entered you, his eyes focused on you as yours squeezed shut, clearly acknowledging the pain he had mentioned. It stung, but he stayed still, looking over you carefully and monitoring your thoughts, suppressing the urge to smile as you contemplated in frustration just how large he was given the pain you were in.
After several moments the pain subsided, and you opened your teary eyes, nodding shyly at him. He again began a slow and steady rhythm, watching you carefully the entire time.
He watched tour frown and furrowed brows develop into a similar expression as you wore earlier. He leaned forward, keeping his pace as he ran his thumb across your lips. Opening them immediately, you sucked in it thoughtlessly, your mouth full of saliva as he pulled it out, placing it on your clit and rubbing small circles.
You responded with a sharp arch of your back and a soft moan, your eyes squeezing shut once again. Your breast escaped you once more as Kibutsuji picked up his pace, his eyebrows furrowing himself.
The room was filled with soft hums and moans, and from your thoughts, Kibutsuji knew you were soon to finish. But what he didn't expect were tour arms wrapping around his neck, selfishly pulling him down to kiss you as you arched your back once again, legs quivering. In such a comprising position, Kibutsuji couldn't exit you either, and so, he collapsed into your arms, finishing shortly after you.
Too exhausted to speak, your body fatigued from multiple orgasms, you drifted off into sleep, with the vague feeling of being carried, surrounded by warm water, and then placed back in bed.
A/n- sorry it took so long and the chapters so short. Life has been really really rough :/ but I hope you guys enjoy my try at smut lol also- sorry for all the typos. It's 1:30 in the morning for me and I'm too lazy to proofread
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For You - Kibutsuji Muzan x Reader -
Fanfiction- - - kibutsuji lived a near 1,000 years of disappointment; when someone such as himself was so perfect, what could ever match up to his expectations? - - - a Kimetsu no Yaiba: Demon Slayer fanfiction