Yandere Michikatsu x Muzan modern AU

A/N: brief warning of getting forced to do public sex is in this fic.

Michikatsu walked through the halls of the school, searching for his best friend and crush, Kibutsuji Muzan. The man was beautiful and intelligent man he ever knew. They were childhood friends, and Michikatsu was absolutely in love with him. He searched for Muzan, and smiled when he saw the shorter. Muzan was an albino, which made him even more beautiful. He put his hand on Muzan's shoulder.

"Oh, hey Michi," Muzan giggled and hugged him. "Hello, Muzan. How are you?" he asked as he wrapped his arms around Muzan's slutty waist. He smiled and looked around. "Muzan, we should go to class," Michikatsu stated.

Muzan pouted, the long white haired man didn't feel like going to class. "I don't want to, though," he whined, hugging Michikatsu tighter to him. He chuckled as he rubbed against Muzan's chest. "Don't be such a baby, you're always so needy," he smirked and leaned in closer to Muzan's face. "Come on, let's get out of here," he said, kissing Muzan deeply before pulling away from him.

Muzan was shocked at Michikatsu's kiss and his face turned red. "I-I-" he looked away in embarrassment. 'Calm down, Muzan. This is just what friends do, just keep calm," he thought before following Michikatsu to their class. They walked into class and sat together at the back. The teacher called roll and they both stood up.

"So, I guess this means we're boyfriends now?"I...I suppose so," he nodded with a blush on his cheeks. "I suppose we are dating now," he confirmed." Michikatsu asked, looking over at Muzan who blushed.

Michikatsu grinned widely and put his hand on Muzan's thigh. "Good boy~" he whispered softly into Muzan's ear. "Now lets go home after school okay? We'll have some fun there." he added, squeezing Muzan's leg gently. "And maybe something else too..." Muzan turned red. "H-hey, let's not move too fast," he chuckled nervously as Michikatsu stroked his thigh.

"Hmm? But we are boyfriends now, right?" he asked, smiling innocently. "Besides, you love me and want me for yourself, so why not indulge in some kinky fun with me?" he suggested, licking his lips. Muzan covered his face with his hands. "L-let's discuss this later, we're literally in class," he muttered, his thighs shaking as he grabbed his pen to write.

Michikatsu squeezed Muzan's leg gently again and leaned over to whisper in his ear. "You know you wanna bend over for me and take it hard, just thinking about it makes me so hot..." he grinned before straightening up and writing his name on the roll sheet. Muzan turned redder than a tomato at Michikatsu's words and he shook. "I-I...Y-you- pervert!" he huffed and bonked Michikatsu on his head.

Michikatsu laughed softly and slapped Muzan playfully on his thick thigh. "Pervert? That's rich coming from someone who wears short skirts and flirts with me," he teased, leaning forward to give Muzan another quick peck on the lips.

Muzan yelped when Michikatsu slapped his thigh. "W-whatever," he huffed as he continued to write on the paper, blushing. Michikatsu snapped his fingers and tapped his pencil on his desk. "Oh, I know what we can do later!" he exclaimed, grinning widely. "I have an idea that will be both fun and kinky..." he muttered in excitement, rubbing his hands together.

Muzan put his hand on Michikatsu's mouth, so he'd shut up. "You're lucky we're in the back so we wouldn't get detention as easily," he huffed before removing his hand from Michikatsu's mouth. Michikatsu smiled mischievously and winked at him. "We'll see how much luck I need once I'm done with you," he said teasingly. "Now come here and kiss me~" he requested, grabbing his boyfriend by the collar of his shirt and pulling him close.

"We're still in class, dumbass!" he whisper-shouted and bonked Michikatsu on the head again so he could continue working. "Muzan, you're such a brat~ But okay, fine, I'll behave. For now... But later, we're gonna have so much fun~" he said with a devious grin, biting his lip and unconsciously running his hand up Muzan's thigh under the table.

Muzan blushed as sweat fell down his face. "Move any higher and I'll break your hand," he threatened, gripping Michikatsu's hand tightly. "Aww, but I want to touch you so badly~ Might have to find other ways to get you off, then," he said mischievously, making Muzan's heart beat faster at the thought. "Tell me, how would you like it if I licked all the way from your neck to your-"

"Finish your sentence and I'll stitch your damn mouth, Tsugikuni Michikatsu," he glared at the other, tightly squeezing his hand. Michikatsu chuckled softly and kissed Muzan deeply for several seconds before breaking away. "Alright alright, no more threats or violence today," he sighed happily, leaning against Muzan's shoulder. "Just promise me one thing though..." he whispered into his ear, nuzzling closer to Muzan.

"Promise you what?" he asked, raising his eyebrow at Michikatsu who cuddled up against him. "I want you to take me somewhere special tonight after class. Somewhere private where no one can disturb us. I want to show you how much I love and appreciate you, Muzan-kun~" he whispered, closing his eyes and shuddering at the thought of spending the night alone with Muzan.

Muzan gulped, his thighs shaking softly. "Okay..." he nodded softly before continuing his work, again. "Now continue working, Michikatsu. Or the teacher will send us to detention." Michikatsu giggled quietly and leaned back in his chair, watching Muzan intently while he worked. His breathing became heavier as time passed by, feeling himself getting lost in thought about what might happen between them tonight. Eventually, he decided to speak up. "Hey, Muzan?

Muzan looked up from his paper. "Mh?" he raised an eyebrow at Michikatsu. "What do you need?" "Um, I just wanted to ask you something about tonight," he said, slowly getting up and moving closer to Muzan's ear, his voice dropping dangerously low. "I've been thinking about it all day, and I want to make sure everything goes perfectly for us," he whispered, biting his lip lightly as he continued.

The red eyed man nodded softly, blushing as Michikatsu stroked his thigh again. "M-michikatsu, don't do that..." he muttered. "I know, I know," he giggled, tracing his finger along Muzan's skirt. "But it's just so hard not to touch you when you're so close. Besides, I know you like it, Muzan-kun~" he grinned, running his fingers up to the back of Muzan's thighs. "And, you're ill, I simply want you to feel good only."

Muzan nodded. "I know, but not in class. People can see and hear us, you know?" Muzan remarked as he stopped Michikatsu's hand from travelling further on his skirt. "Well then, let's go somewhere more private, shall we?" he asked, looking into Muzan's eyes with a smirk. "It'll be our little secret, right?" he winked playfully. "Just you and me...no one else."

He huffed and stomped on Michikatsu's foot. "We're literally in class and school. Plus we've barely done any work." "So what? We'll do it later tonight after everyone else has gone to bed. No one will know, and we'll have a chance to be truly alone," he said, rubbing his face against Muzan's neck, causing the boy to groan quietly.

"Yeah, but now focus on your work, okay?" he asked Michikatsu and pulled his face away from his neck. "Or I might just cancel tonight," he smirked. "Hah! You wouldn't dare!" he laughed, pushing him away slightly. "Besides, if you were serious, you'd have already cancelled. I'm not going anywhere without you tonight, Muzan-kun~" he smiled, kissing his cheek affectionately.

Muzan covered his mouth again. "Shut up or I'll cancel for real. Now work on your paper, damnit," he groaned, continuing his work for the 5th time or something. He chuckled lightly before leaning forward once more, pressing himself firmly against Muzan's body. His lips brushed against Muzan's earlobe gently, sending shivers down his spine. "Work harder, baby," he whispered huskily, nibbling at his lobe playfully.

Muzan turned red. "O-okay," he gulped and worked, his hand shaking from what Michikatsu had just done a few minutes ago. He leaned back and grinned devilishly. "That's my good boy~" he purred, patting his lap. "Come here..." he beckoned, holding out his arms.

The bell than ringed, which made Mean sigh in relief. "Thank god," he smiled and got up. He looked over as he was getting up. "What are you doing, babe?" he asked teasingly. "I thought you wanted to finish that paper first?" he teased back, winking mischievously.

He deadpanned and bonked Michikatsu on his head again. "Shut up, school is over," he huffed and grabbed Michikatsu's hand and his paper. "Oh? Is that so?" he smirked, giving him a playful shove. "And who says I can't take care of both things?" he asked mockingly, tugging on his arm playfully.

Muzan looked confused. "Take care of what? What do you mean by that?" he raised his eyebrow, crossing his arm. He waggled his eyebrows suggestively, grinning cheekily. "I'm not gonna take care of your paper, don't worry~" he purred, "But what I am gonna do, is take care of you~" he said seductively, running a finger down his thigh.

Muzan yelped. "Do you have an obsession with my thighs or something?" he huffed as they walk out of the school. "Maybe a little," he chuckled, "But they're just so soft and cute, and I wanna bite them~" he said wickedly, making Muzan blush even more furiously. "And I wouldn't mind if you crushed my head with those beautiful thighs of yours," he smirked, groping his thighs.

The albino man gulped. "Y-you- what now?" he looked at Michikatsu with a blush creeping on his pale cheeks. He chuckled, squeezing his thighs tightly before letting go. "I don't know about you, but I'm horny as hell~" he purred, dragging Muzan towards the nearest bushes. "Think you can handle it, babe?" he asked coyly.

"We're not going to have sex in the bushes! My house is like 5 minutes away from here," he shook his head. "Why not?" the taller smirked, "The thrill of getting caught is something I'm always up for~" he said suggestively, reaching for the bulge in his pants.

The red eyed male sighs. "I don't want my reputation ruined. Maybe another time, may I remind you that we needs condoms and lube?" Muzan commented, gasping when Michikatsu turned his ass towards Michikatsu's crotch. "How would that ruin your reputation?" he grinned mischievously, pulling off his shirt.  "Besides, who cares about some silly reputation when you've got me right here~" he moaned softly, rubbing his crotch against Muzan's ass.

Muzan mewled. "Because...if we get caught I'll be seen as a whore..." he mumbled softly. "And I worked hard for my reputation, thank you very much." "Oh come on, there are worse things than being called a whore," he smirked, pinching Muzan's nipple playfully. "Plus, you'd make a great one~" he cooed suggestively, grinding his crotch into Muzan's ass again.

"I am not a whore," he huffed, whimpering as Michikatsu rubbed his hand against his nipple. "But you'd be so good at it," he muttered, licking his lips. "Think of all the kinky sex we could have~" he teased, wrapping his fingers around Muzan's dick through his underwear, lifting his skirt in the process.

Muzan mewled. "No...I don't want to do it outside..." he muttered. Michikatsu grinned slyly, "But why not?" he purred, "The risk of getting caught is a total turn on for me~" he breathed against Muzan's neck. "But I don't like it," he said sternly.

Michikatsu chuckled, "Then let's go somewhere else where no one will see us~" he whispered huskily, kissing Muzan deeply before leading him back home. Once they were inside, he pushed Muzan onto the bed forcefully. "Now shut up and take these clothes off~"

"Make me," the shorter smirked, teasing Michikatsu. Michikatsu growled playfully, grabbing Muzan by the collar and yanking him close to kiss him roughly. His hands roamed over Muzan's body possessively, squeezing his breasts roughly and fingering his hole roughly. "Mmmh..you're such a slutty boy~"

"N-no~ I'm... not a slut..." he panted, moaning as Michikatsu fingered his hole. "A-ah..." he whimpered. "But you are," Michikatsu purred, pushing two fingers inside of Muzan before adding a third. "You like having your ass played with, don't you?" he whispered in his ear, teasing him mercilessly.

Muzan moaned, arching his back. "A-ah...!" he gasped. "Y-yes... I do," the white haired male nodded rapidly. Michikatsu smiled mischievously, pumping his fingers faster now. "Good boy~" he praised, pulling out his cock from his pants. "Let's get started then~" he demanded, spreading Muzan's legs apart and positioning himself between them.

Muzan screamed as he felt Michikatsu's cock inside his hole. His hole clenched hard as he gripped the black sheets. Michikatsu chuckled, "That's right, boy. Take it like a good slut." he purred, pumping his hips roughly against Muzan's ass. He knew he would never get enough of fucking Muzan like this. "You like it, don't you? Feeling my cock inside your ass?"

"YES!~ OH~!" He moaned as Michikatsu pounds harshly into him. Michikatsu grinned widely, loving how tight Muzan was around his cock. He leaned forward, pressing his lips firmly against Muzan's neck. "Say that again for me, bitch." he demanded gruffly.

"S-say wh-AH~!" he screamed when Michikatsu pounded harder into him, his eyes rolling into the back of his head. Michikatsu smirked, kissing Muzan's cheek affectionately. "Oh, poor thing~ You can't handle it, can you? Such a weak little boy~" he teased, thrusting his cock deep inside of Muzan's ass once more. Muzan gasped for air, he felt as if he was getting folded in half. His thighs tremble and drool fell from his puffy lips.

"That's right~ You like it, don't you? Feeling me fucking you like a good little slut~?" Michikatsu purred, giving Muzan's ass a hard, painful slap. Muzan screamed in escasity, his tongue poking out of his mouth as he weakly gripped the sheets.

Michikatsu laughed loudly, slapping Muzan's ass even harder than before. "Such a pathetic little whore~" he growled lowly, pounding into Muzan's ass mercilessly. "I'm going to make sure everyone knows who owns you, hm?"

"OH!~ YES~!" he nodded eagerly as Michikatsu continued to spank his ass. "AH~!" he screamed at the top of his lungs. "Good boy," Michikatsu said approvingly, reaching down and pinching Muzan's nipples gently. "Do you want me to cum inside you, boy?"

"Y-YES~! PLEASE~!" he nodded desperately again as he felt his hole get filled with hot, sticky liquid. He came not longer after and panted. Michikatsu chuckled, pulling out of Muzan's ass and moving over to the side. He kissed Muzan tenderly on the lips, looking into his eyes with a soft smile. "Good boy," he praised, running his fingers through Muzan's hair comfortingly. "I think you're going to make a wonderful little whore."

Muzan blushed as he panted. "Sleep well, Michikatsu," he smiled, nuzzling up against Michikatsu. "Of course I will," Michikatsu replied happily, patting Muzan's head affectionately. "Don't worry about a thing, my dear..." he added softly, leaning forward and pressing a kiss to Muzan's forehead. "Just sleep... And dream sweet dreams of me..."

Muzan smiled and fell asleep, Michikatsu not long after. The next day, they went to school. They needed to separate ways. And during the first break, Muzan went running to Michikatsu, crying.

As soon as Muzan entered the school yard, Michikatsu saw him immediately. He stood up from the seat he sat in and walked towards him. When he reached Muzan, he wrapped his arms around him tightly. "Oh, poor thing," he murmured, stroking his back soothingly. "What happened?"

Muzan sniffed. "There's this girl who won't leave me alone. She taunts me and says you're using me for my body..."

Michikatsu frowned, gripping Muzan harder. "Don't you worry about that," he whispered fiercely. "Tell me who she is, and I'll deal with her..."

He said a name, to which Michikatsu nodded. "What are you going to do to her?" he asked curiously. Michikatsu grinned mischievously. "Well, if she keeps bothering you like this, then I'm afraid..." he paused, grinning evilly. "...She might just end up getting hurt real bad." His grin widened even further when he heard what Muzan had to say.

"She's been doing it for a while now..." the albino stated, sniffling. "So you've told me," Michikatsu chuckled darkly. "But have you told her that? Have you warned her off?"

"Yes, but she says I shouldn't be hurt because I'm a boy." Michikatsu growled, burying his face in Muzan's hair. "Don't you worry about that, sweetheart," he murmured, his voice thick with emotion. "I won't let anyone hurt you like that. You don't deserve it, and I won't stand for it..."

Muzan smirked, what he said was infact, not true. He just wanted to get rid of the girl because she annoyed him, and Michikatsu would get rid of her for him! How delightful.

Word count: 2894