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English
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Published:
2026-05-14
Completed:
2026-06-27
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3,130
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3/3
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C'mon, Serizawa~

Summary:

After a long day of exorcising with numerous salt attacks, reigen is tired...And horny of course...Who else to turn to other than his co-worker whom he's very attracted to..? C'mon, Serizawa~

Notes:

yeah I wrote this during the first period at school when I found out that there's not a lot of freaky reigen x serizawa fics on here.

I sat there wondering "should I wait for a freaky fic to come? Or should I just write it myself?"

Guess what I did.

Chapter Text

"Haah..." Reigen sighed heavily as he entered his office, lights dim as he untied his tie, his button up disheveled messily as he walked through the hall.

"Serizawa...? Where are you?" Reigen called out, his face slightly flushed from how he's currently feeling...horny. 

Reigen couldn't help but squirm his thighs together at the thought as he approached Serizawa who was peacefully studying at his desk.

"Oh, welcome back Reigen." Serizawa's tone was so soft, it made Reigen even more excited as he glanced down at his papers. He noticed Serizawa was becoming more sluggish during exorcisms, his work must've been tiring him out a lot...He might need a little reliever. 

Reigen gently placed his hand on top of Serizawa's, caressing it softly. Reigen was bold with his actions, mostly because he was cocky and mostly because he knew Serizawa was attracted to him as well without him even needing to say it. 

Hes seen Serizawa around the office, how he fumbles with his sleeves nervously around him, how he's constantly brushing his nape, how he flushes red around him, he was too easy to read for Reigen.

Serizawa, as expected immediately turned a bright shade of red, his expression turning to one of obvious vulnerability. "R-Reigen...? ah...?"

"C'mon Serizawa...Isn't all this work stressing you out~?" Reigen's tone became flirty as he leaned in closer, his eyes half lidded with desire. "R-Reigen...What're you inferring..?"
"What do you think I'm referring to..?"

Serizawa's eye darted everywhere but Reigens gaze, internally screaming. Serizawa secretly always wanted this moment to occur, he'd always been eyeing down Reigen ever since he started working alongside him. A droplet of sweat rolled down Serizawa's cheek, slowly nodding in agreement. As he did so, Reigen's smirk widened and he made Serizawa's chair recline back, hopping on his lap. 

Serizawa inhaled sharply, his hardening boner already forming a tent in his pants. Reigen had his hands firmly on Serizawa's shoulder for support, already grinding his ass against Serizawa. 

Serizawa's breath hitched and he let out a soft whimper. "You're sensitive, huh~?" Reigen teased as he leaned in close and licked his ear lobe playfully.

Serizawa trembled at the sudden, wet sensation, Reigen's breath against his ear hot. "I-I don't- I don't know...." Serizawa's tone became higher in pitch.

"Don't know what? Hm?" Reigen became even more teasing as he whispered in Serizawa's ear, grinding against him slowly and quietly whimpering. "I-Im a virgin, Reigen..." Serizawa was already breathy. Reigen simply smirked and chuckled softly. "A virgin, huh? Don't worry, I'll teach you~" As Reigen said that, he started taking his buttoned shirt off. Serizawa watched shakily, each button being undone was like a countdown to Serizawa, his hands unconsciously landing around Reigen's hips. Finally, his shirt was off, his nipples already hard and perky, it made Serizawa excited, his gaze locked on Reigen's bare chest. 

"You can touch y'know~" Reigen mumbled in Serizawa's ear as Serizawa hesitantly brought his hands up to his nipples, his hands shaking like crazy. This was so overwhelming for Serizawa, yet he wanted this so much it started to ache. Suddenly, Reigen gasped sharply, his hand flying to cover his mouth as Serizawa started sucking on one of his nipples. Serizawa's eyes became half lidded, his shoulders relaxed instead of tensed as his hands started to move on their own, moving to caress Reigen's slim waist while his tongue danced around Reigen's sensitive nipples. "A-ah! S-Serizawa~" Reigen let out a lewd moan, making Serizawa shudder, especially since he moaned his name. Serizawa started to become entranced with Reigen's body, wanting more as he leaned closer, his hands coming up to twist away at Reigen's nipples while he used his mouth to lick up Reigen's adam's apple.

Reigen flipped his head up to give more access to his neck to Serizawa. Reigen started to feel hot, his ears burning and his lower body aching. Reigen reached down to take his pants and boxers off, just enough so that his aching dick could be let out free. Serizawa stumbled slightly at the sight of Reigens hard dick, the tip glistening with Reigen's pre-cum, his tip red.

Immediately, Serizawa lifted Reigen up and off his lap, gently pinning him against the wall as he knelt down to face eye to eye with Reigen's cock. Reigen gasped sharply at the sudden movement. "S-Serizawa...? W-what're you- Ah!!" Reigen gripped Serizawa's shoulder as the man knelt before him started to slowly circle his tip with his tongue. Serizawa seemed to be so focused, as if lust had completely taken over him. Reigen stuttered at the sight, red filling his ears, his knees starting to meet as he started closing his legs from the overwhelming pleasure, but Serizawa pushed them back. "S-Serizawa...You're doing so well~" Reigen praised as he caressed Serizawa's face.

Serizawa was soon met with Reigen's cum exploding in his mouth. Serizawa's eyes widened and he pulled back, hesitant if he should swallow or not. 

Reigen brought a hand to Serizawa's mouth, not wanting him to spit it out as he started praising him once again. "C'mon, Serizawa~ Swallow all of it like a good boy~" Reigen waited as he watched how desperate and needy he made Serizawa, his eyes glistening with slight tears, his expression submissive as he gulped, swallowing it all. 

"S-so good.." Serizawa weakly let out as he leaned closer against Reigens touch, Reigen petting his head and chin like a puppy.

"mm, you liked that? Was your meal tasty, Serizawa~?"

Serizawa shuddered, his adam's apple bobbing as he knelt closer, gently mumbling "y-yes...Yes, I-so tasty.." Serizawa pants softly, his hands going up towards Reigen's hips, his finger nails gripped against his pants. 

"Wanna head back to mine? Hm?"

 

 

~Reigen's Apartment~

 

 

As soon as Reigen clumsily jerked his key in the keyhole, the two men stumbling in as if drunk, their lips locked against each others. Loud panting, wet noises and little whimpers and grunts filled the once silent apartment as Reigen closed the door behind him, pinning Serizawa to the wall with a loud thud. "A-ah, Reigen- Mmmph~!" Serizawa was silenced with Reigen's tongue, shoved into his mouth and played with his.

Reigen raised a brow, his eyes lifting open as he glanced at Serizawa mid make out.

Was Serizawa seriously making out with him spelling out the alphabet with his tongue...? Wow, what a technique...

Reigen pulled back and giggled softly, caressing Serizawa's confused face. "God, you're adorable, Serizawa..." Reigen chuckled and started planting a trail of kisses along Serizawa's neck and collarbone, slowly stripping him of his clothing. Serizawa watched this unfold, he was really gonna have his virginity taken from Reigen...Gosh the thought was too much to bare...

 

The two tripped their way towards Reigen's twin xl, Reigen's arms around Serizawa's neck, their kissing continuing as Serizawa laid him down against the bed.

"W-what do I do next....Reigen..?" Serizawa couldn't meet Reigen's eyes, his eyes drawn to Reigens torso and crotch. 

"Strip, Serizawa...I will as well.." Reigen said as he started taking his clothes off once again, his torso stretching as his arms rose above his head. Serizawa couldn't stare too long, he needed to start taking his own clothes off. Serizawa's hands started fumbling with the hem of his shirt, quickly and frantically taking all his clothes off. Once he was done, he sat on Reigen's bed awkwardly, sitting criss cross apple sauced as he waited for Reigen to be done, though he didn't have to wait long as Reigen immediately lunged himself onto Serizawa.

This time was different, the first few times Reigen lunged against Serizawa, they had clothes on between them, a barrier between their skin, but now? Reigen's soft, milky skin against Serizawa's was almost deadly. "Your body is so warm, Serizawa...I love your skin against mine..God, your body..."


Serizawa felt like a robot malfunctioning as he anxiously placed his hands around Reigen's ass, it felt almost like touching an ancient scripture that could easily rip to him. "C-can I.." Serizawa muttered quietly as he watched Reigen nod with a flirty smile glued to his face.

Serizawa started inching his fingers closer towards Reigen's entrance, his most sensitive area. As he did so, Reigens head delved into Serizawa's shoulder, whimpering softly as he started backing his ass closer to the other man's hands.

"Can you find my prostate? I can teach you~" Reigen giggled and sat up on Serizawa's lap, taking his fingers and guiding them in his hole. 

"You're lucky I fingered myself beforehand..." Reigen started lowering himself onto the other's slender fingers, Serizawa's breath catching in his throat as he felt for the first time, Reigens insides. It was slimy, hot and felt tightening against his fingers, even after the easy slip in. Serizawa glanced up at Reigen's weak expression as the ginger let out a little moan. 

"Ahh! Haah...!"

 

 

To be continued cause I'm high-key lazy.

(I will be posting a pt 2)