Posted originally on the Archive_of_Our_Own at https://archiveofourown.org/ works/9553628. Rating: Explicit Archive Warning: Underage Category: M/M Fandom: モブサイコ100_|_Mob_Psycho_100 Relationship: Kageyama_"Mob"_Shigeo/Reigen_Arataka Character: Reigen_Arataka, Kageyama_"Mob"_Shigeo Additional Tags: Master/Pet, Dom/sub, Shota, Cock_Warming, Oral_Sex, Fluff, no_really. there's_fluff_in_there., Come_Swallowing, Dom_Mob, Sub_Reigen Series: Part 1 of Dom_Shota_Mob_Oneshot_Series Stats: Published: 2017-02-02 Words: 2161 ****** Warm Me Up ****** by MerryGoat, reigenonice_(TardisType221b) Summary After spending their morning out in the cold, Reigen needs to help Mob warm up. Everywhere. Notes Written by both the lovely ReigenonIce and the grotesque MerryGoat, we give you this abomination! Preened and Beta'd for release into the wild by Fruits! See the end of the work for more notes It was another cold February morning as Mob and Reigen trudged through the wet snow that had long been fresh. Now nothing but a nuisance, making it’s presence clear with the nasty cold burn that came with winter. Side by side they shuffled back to the office, just having had bought breakfast from the local convenience store. Reigen held the bag full of fruit, sweet bread, and drinks with his left hand, bag threaded between his fingers. His entire right arm had already been claimed by Mob, who was determined to walk as close as humanly possible to the older man. Reigen had been content with their walk, unable to complain about the closeness since he really didn’t mind. It wasn’t until Mob’s body fell behind, leaving his side for a split second that he finally piped up. “Oi, Mob, what are you waiting-” he tried to say, but was instead interrupted by the answer. Without asking for permission, Mob snuck up behind him, lifting the back of Reigen’s winter coat. “Hey, it’s cold!” Reigen complained, but the boy didn’t listen and instead popped his head up the back of his coat, effectively hiding like a turtle at the back of Reigen’s coat. “It’s cold,” Was Mob’s simple explanation, pressing his chest forward to motion Reigen to continue forward. Reigen couldn’t help a small laugh at the curious antics of his student, unable to reprimand his immediate instinct to nestle into him. “But we won’t be able to walk very far this way,” Reigen said, reaching behind himself to pat Mob’s back. He felt Mob shrug his shoulders, only nuzzling harder against his back to show that he would not be going back out into the cold air. “It hurts my nose,” he explained, twitching it against Reigen’s shoulder blade. “Hmmm,” Reigen hummed, tilting his head back to look up. Gray filled the sky, not a single discernible form stood out. “Well, we can’t walk the entire way like this,” Reigen said, shrugging his coat off. Mob made a noise of protest, but Reigen continued, “I know a much faster way to get home - one that won’t freeze us in the process.” He turned to face Mob, his head tilted under Reigen’s coat that fit over him like a cloak. Reigen had a thinner sweater under the coat, so he wasn’t too concerned about being cold. But Mob had overestimated his cold tolerance, and only left his house that morning with a green hoodie, a cute little puppy face design at the front. “How’s that, shishou?” Mob asked, shrugging the coat down to drape over his shoulders. “It’s simple!” Reigen announced, reaching forward to scoop the boy into his arms. Mob initially squeaked in surprise, arms flailing in the air from the unexpected action, but quickly clung his arms around Reigen’s neck. The handle of the grocery bag slid onto Reigen’s wrist while his large hands held the boy by his bottom and back, making sure not to drop him. “Alright, now just wrap your legs around me and we’ll be set,” Reigen said, patting Mob’s thigh. Without a second of hesitation, showing complete trust in Reigen, Mob followed his instruction and wrapped his legs around the man’s hips. He was rewarded by a pat on the back, and Reigen cocked his hip to the side to have a steady hold of the kid. “See, much more comfortable,” Reigen smiled, resuming their walk back to the office. Mob hummed in agreement, relaxing into Reigen’s strong hold. He buried his face between the crook of Reigen’s jaw and shoulder, nuzzling into his neck. Reigen twitched, unprepared for the sudden contact to such a sensitive spot. But he didn’t complain, instead tilting his head to the side to press his cheek against Mob’s head. The entire way home, Mob hummed contently against his neck, occasionally whispering tiny words of appreciation before nuzzling back against his neck. It took a lot of self control for Reigen to not accidentally drop the kid with every sudden hum, noises that sent vibrations up Reigen’s throat. By the time they arrived to the office, Reigen couldn’t feel his own nose from the cold. But Mob seemed to be more than content with leeching all of the warmth for himself, and Reigen didn’t mind. Mob was so comfortable and content in his arms and Reigen knew he’d do anything Mob wanted just for Mob to feel this way again. That child had him wrapped around his little finger. “Hold on tight,” Reigen warned, holding his hip out to carry Mob’s weight, letting go of his back to unlock the door. The key jingled loudly as he wriggled the lock open, and when he shoved them back into his pocket. Mob made a noise of acknowledgement against his neck, turning his head to rest his cheek on Reigen’s shoulder as they finally entered the office. “You did so well today,” Mob murmured, half lidded eyes staring up at Reigen as he shut the door. With a secure arm still wrapped around Mob, Reigen strided to the far wall where the thermostat waited. 15 °Cit read, the aftermath of passing through a night of keeping the temperature low to save money. Reigen shuddered, pointing a glove clad finger out to turn up the heat. Once Reigen set the thermostat and he could feel the radiator starting to heat the room he walked over to his desk, setting Mob down on his chair. He painted quite the picture, so small in his chair, wrapped in his coat, but staring at him so intensely. “Aren’t you going to warm me up?” Mob asked and Reigen felt a pang of anxiety. Had he disappointed Mob already? They had only been here for a few minutes. Reigen got on his knees in front of Mob. He removed his own gloves and took Mob’s small hands in his. He slipped Mob’s gloves off of his master’s hands, now so small and delicate without the thick gloves to shield them. Reigen knew that Mob loved the fact that he seemed to radiate heat and he took advantage of that by rubbing Mob’s cold hands in his. “Does that feel better?” Reigen asked, massaging and squeezing their hands together. Reigen had done all he could to keep Mob warm while they were outside, but somehow that wasn’t enough. Mob nodded, but then was betrayed by a shiver. Reigen quickly got to work. He unzipped Mob’s coat, and pushed it off his thin shoulders so that he could help Mob pull his hoodie over his head along with his t-shirt. Mob’s nipples were erect already but Reigen avoided them for now, focusing on getting rid of the goosebumps on the rest of Mob’s upper body, which began to warm under Reigen’s gentle rubbing. He heard Mob sigh in relief once Reigen had been at it for a little while. Mob purred under his touch. “It’s finally warming up in here,” he said, tilting his head back to enjoy Reigen’s warmth. He shifted in the seat, nuzzling back against the chair and spreading his legs casually. Now that Mob was comfortable, he could focus on more important areas. Knowing the drill, Reigen didn’t need to say a word before running his large hands up Mob’s lithe sides, enjoying the soft boyish curves of body. His thumbs brushed against his nipples which were unsurprisingly already hard. Reigen smiled to himself, eyes focusing on Mob’s rising and falling chest as he slowly rubbed circles around those perky little nipples. “Shishou, my chest is already warm,” he said, sleepily staring down at him. His smaller hands reached up to spread over Reigen’s wrists, tugging them down his body, allowing Reigen the privilege of touching his stomach before they reached the destination. Reigen’s breath hitched, even after time and time again unable to fully come to terms with how glorious this entire trade of power was. Mob had lead his hands down to his lower stomach, stopping just short of his crotch. “I’m still cold here,” Mob said, letting go of Reigen’s wrists. “Right here,” he pointed a finger between his thighs. Without needing to be explicitly told what to do, Reigen knew what was implied. With shaking fingers, he pulled the front of Mob’s pants open. His eyes stayed focused on Mob’s expressions waiting for any change in expression that might indicate anything short of content. Instead of any displeasure, a small smile curled the edges of Mob’s lips. Encouraged, Reigen tugged Mob’s pants and underwear down with a few pulls. He left the pants on, but just low enough to reveal the entirety of Mob’s cock and balls. Mob’s soft, fat balls were so cute… Working as a pillow for his cock, still soft, even smaller than usual with the cold. Reigen couldn’t pull his eyes away, wrapping his hands around Mob’s thighs to spread them further so he could accommodate himself between them. Eyes on the prize, Reigen lowered his head to face Mob’s cock which responded with a tiny twitch. He opened his mouth, enveloping the boy’s cock down to the base with a gentle suck. It was so small in his mouth, only half his tongue. But as tempted as he was to just play with it, he realized he had an actual task at hand. With practiced movements, he gently twirled his tongue along it’s entirety. He gave gentle suction, lapping up the underside to make sure he hit every point. Mob’s cock twitched against his tongue, hardening in his mouth, rewarding Reigen for his efforts. “Shishou…” Mob whined, sounding so innocent and small despite being in charge. Those small fingers threaded Reigen’s hair, pulling and petting as his hips began to squirm under Reigen. “You’re being unfair, you have to take the rest too,” he demanded, hips stuttering up. Not needing to be told twice, Reigen opened his mouth wide, sticking his tongue out to pull the boy’s plump balls into his mouth. Mob whimpered above him, his shaky hands petting Reigen’s hair back. “Good boy, keeping your student warm,” Mob purred. Reigen hummed in joy around the entirety of Mob’s cock and balls, the vibrations causing Mob to jolt forward and grip his hair. “Sh-shishou! Do that again,” he said, hips shaking as he gently humped forward. Happy to comply, Reigen hummed a little tune as he continued to suck. Reigen’s hips swayed happily when he felt Mob’s cock fully harden, stiff on his tongue and leaving a salty taste in his mouth. With a gasp, he released Mob’s balls from his mouth so he could focus solely on his cock. Mob whimpered at the exposure, but didn’t complain. Especially with not how wonderfully Reigen was working his cock. His hot tongue rubbed the slit, rubbing up and down at the small underside vein of the kid’s cock. He sucked, bobbing his head in a sloppy rhythm while he used a hand to rub and gently pull on Mob’s slobber covered balls. He could hear Mob panting, feel those hips bucking up into his mouth repeatedly. He raised his other hand to spread his fingers over Mob’s tummy, enjoying the way it heaved in pleasure. Reigen’s chin was slippery with his own saliva mixed with precum. Without warning, Mob’s hips thrust up one final time, his hands desperately holding onto Reigen’s head as he curled over himself. “Sh-sh-shhhhuuuuh,” Mob mumbled, cock and balls twitching as they released spurts of cum. Reigen greedily swallowed it all, sucking even harder to get every bit. Mob fell back into the seat, boneless, weak from orgasm and shaking. Reigen continued to kitten lick Mob’s spent cock clean, happily lapping up the mess he made as the boy’s cock softened before his eyes. “Was that good, Mob?” Reigen smiled, out of breath. Mob stared down at him through lidded eyes, knitting his brows. He frowned. “Yes, but stay.” Mob demand, wiggling his hips to remind Reigen of exactly what he was talking about. “Well, if you insist.” Reigen smiled, unable to hide his joy from gaining permission to stay latched on to his favorite treat. Once again he leaned forward, this time keeping his eyes up to look at Mob who stared at him expectantly. He opened his mouth wide, engulfing the entirety of Mob’s soft cock and balls into his mouth. He didn’t move his tongue, suck, or even toy with the soft member. Instead he allowed himself to be used as a warm holding spot, content with Mob softly petting his head in appreciation. He could see Mob’s face relaxing, shoulders slumping as he blinked slowly. It was clear he was struggling to stay awake, nose twitching as he blinked his eyes harder. Reigen hummed, patting Mob’s thigh and giving him a look of contentment, encouraging him to sleep. He didn’t mind if Mob fell asleep. Reigen had done his job well, his master warm and sated. End Notes ^q^ thank you for reading! Please drop_by_the_archive_and_comment to let the author know if you enjoyed their work!