Archive of Our Own ^beta

Everyone has their secrets. There are secrets you tell people, and there are secrets you don’t dare tell anyone. And then, there are secrets that you keep from yourself. They feel like static on the brain, putting out their little feelers to try and find a chink in your armor to make you remember. Secrets so deep and dark that they feel like a black hole sucking you into an inky void. Sometimes, if you’re unfortunate enough to remember, death seems like a better option. 

Reigen is a part of the latter category. The secret is too bad, too deplorable. It’s a constant ringing in his ears and a complete numbness in his fingers. It’s a dull ache in his jaw and an itch under the skin. It’s a secret that would solidify him as demented; a bad person. A Bad Man. 

Reigen doesn’t want to be a Bad Man. 

But, it’s so unbelievably and bone crushingly difficult when his secret involves a little boy with a plain beauty and incomprehensible powers. He’s a boy with the demeanor of a lamb and the inner rage of a demon. Reigen can suppress his true feelings as much as he wants, but he can’t deny the draw he has to both parts of the boy. To Reigen, he has the gravitational pull of 100 suns. He pulls the man’s secrets to the surface like oil floating to the top of old leftovers sitting in a refrigerator. 

He feels that pull every time Mob uses his powers. He feels it every time Mob laughs at one of his horrendous jokes. He feels it whenever Mob’s brother looks at them in suspicion and their parents turn a blind eye. He feels it when he watches Mob do homework at Spirits & Such, his plush lips parted and soft tongue pushed between his teeth in concentration or when Mob looks up at Reigen with those depthless eyes, like the man means something. Reigen is… infatuated. But, he doesn’t want to be. Things would be much simpler if he wasn’t. He can still be a Good Man if he forgets his secret. 

So, he pretends. Reigen bottles up his emotions until they’re rabid dogs with gnashing fangs and puts up a barrier between him and his student. An iron guard to keep the beasts at bay. Because he doesn’t want to hurt Mob. He just wants him. He wants to smell and taste and touch and breathe him in like the first cigarette of the morning, head light and body buzzing like an old box television, turned to a channel with poor reception. 

No matter how good Reigen is at keeping this secret from himself and everyone else, no person can completely forget. There are times when the secret wedges it’s way into his brain and overtakes him like a second, raw, stinging skin. He’s rendered desperate, having to run away to somewhere secluded like his home (if he’s lucky) or a bathroom. He’s been so worked up before that he had to hide himself in a closet and furiously stroke his cock, not even having the decency to pull his pants all the way down. There wasn’t any point in it, anyway. He had cum particularly quickly that time, two thrusts into his fist, thinking about how Mob had looked up at him with those doleful eyes and said, “I really care about you, Shishou,” and wrapped his arms around him moments before he escaped to that closet. Mob had been so affectionate then, his body warm and soft, cheeks flushed pink in adolescent awkwardness. Reigen had given the boy one of his infamous, off-hand lectures because he had seemed a little down recently. There’s nothing like seeing Mob’s eyes shine and mouth hang slack, cheeks flushing as Reigen gives him some made up advice. 

Reigen wonders what his face would look like as he cums; what he looks like when he can’t take anymore. Would he cry? Would he beg Reigen to stop? Use his powers to end the man’s life, being so scared and feeling so betrayed by the very man who told him to never use his powers on anything other than spirits? He supposes maybe he should die if he tried to take advantage of a child that pure, that innocent. But, god, would it be fine with Reigen if he died doing the one thing he promised he would never do; the metaphorical cherry on top of his already slimy existence. Divine punishment. 

Which puts him in a very bad situation when he calls Mob in early for work on an October afternoon. There’s an influx of papers he needs to sign and file on top of emails yet to be answered. Its always in the middle of autumn when clients start calling in about spirits like crazy. Maybe something in the air. Reigen doesn't know and lets Mob deal with the real ones. 

He calls his student and after three rings, Mob picks up. 

“Hello? Shishou?” There’s that sweet voice. He sounds like he’s out of breath and trying to stay quiet. Something about it makes the secret raise its hackles, dogs starting to growl. 

“Mob! Look, kiddo, I have some papers that need filing while I work on emails. I need you to come to work today,” Reigen says, swiveling idly in the chair behind his desk, twirling a pen between his fingers. 

There’s a short pause on the other end and then Mob says, “Shishou, I’m at my club right now. I can’t just leave. I wish you wouldn’t ask me to come in on such short notice.” 

Reigen sucks his teeth and rolls his eyes. Mob stays silent. The man can practically see the nervousness in his knees, the shiftiness of his eyes through the phone. Reigen tosses his pen down on the desk calendar in front of him. Mob will crack. He always does. Except for that one time…. But, they had worked through it. Reigen had almost killed himself; almost threw in the towel on his pathetic, piece of shit life until Mob had finally made the man realize what (or who) means the most to him. 

“C’mon, Mob,” Reigen sighs. “Work with me here. I’ve been doing better about calling you in early, but you know I can’t get all of this done without you. Do me this favor. Please?” 

Mob pauses and then says, “Okay. Just try harder to tell me sooner when you want me to work.” 

“Gotcha, kid,” Reigen smiles. His heart speeds up, tapping against the bones in his chest. “You’re a lifesaver.” 

He hangs up and huffs out a breath, leaning back in his chair. There’s those dogs again, barking, wanting to run towards the boy who is on his way now. Wanting to hunt him, consume him, devour him. They’re particularly hungry today after hearing those soft pants and breathless words from Mob on the phone, seemingly overworked from his after-school club. He must be sweaty, perspiration soaking through his shirt until his nipples poke through. Reigen won’t lie, he knows exactly what gym clothes Mob wears for the Body Improvement Club. Loose white t-shirt with skimpy little red shorts. Granted, Reigen has only seen the boy dressed like that from behind a chain link fence and many yards of grassy field, but it had been… sinful. 

Reigen’s mind slips then and he wonders if Mob will be wearing those gym clothes when he arrives. Will he look just as fuckable as he did when Reigen watched him from between the holes in that fence, eyes darting this way and that, heart hammering and palms sweaty as he watched a child, dreading the moment someone would spot him? He’s sure the boy will and as he’s thinking about the curve of Mob’s ass in those shorts and if Mob is noisy when he gets fucked, he thinks to himself, This is not good. 

Goddamn it, this is not good.

Reigen’s secret is being told right before his eyes as he looks up from behind his computer screen. The boy didn’t knock, didn’t text, didn’t call; not even the muffled scuff of sneakers against tile indicated he’d shown up. He’s just here now, with tousled black hair, flushed cheeks, sweat stained shirt (as predicted), pale chubby thighs, and those fucking shorts. The dog's teeth are grinding on the calcium rich bars of Reigen’s chest, gnawing and keening to be set free. 

“I got here as fast as I could,” Mob says and bows. “I apologize for the delay, Shishou.” 

Reigen swallows and darts his gaze to the side, eyeing a bit of ash that must’ve fallen off the end of his cigarette earlier on the pale tile floor. “Don’t worry about it. Let’s just start so we can end this,” his eyes betray him and he flicks his gaze back to Mob’s exposed legs. “… quickly.” His throat feels like cotton, so he takes a sip from his water bottle. It doesn’t help. 

Mob gives a small smile and places his backpack down by the small couch. Reigen shows him where to file certain things and what to label different files. Mob’s handwriting isn’t the best, but it's legible and that’s all Reigen really cares about. That, and the view he gets from behind his desk. Currently, Mob is kneeling next to a filing cabinet, short legs tucked under him, stubby fingers flipping slowly through files, eyes scanning and double checking, that little pink tongue poking between his teeth. Reigen sits forward in anticipation as Mob presses up on his knees, red shorts wedging between his ass crack. The dogs in Reigen’s chest give a horrendous howl at the sight and bay when the boy picks it out, the elastic snapping against his unseen skin. Instead of leaping over his desk like a rabid animal, giving in to his putrid instincts, Reigen clears his throat softly and opens an email. 

By the time Reigen and Mob are starting to wrap things up, the sun has descended behind the skyline, washing everything in a deep, violet twilight. Everyone else in the old office building should be gone by now. Reigen even sneaks a peek out the window to see all the cars that frequent the parking lot below, absent. There’s not even a security guard patrolling the lot. Completely vacant except for Reigen and his disciple. 

He looks back over his shoulder to see Mob reaching up to place a notebook on a high shelf. He’s on his tip-toes, his balance wavering and he has to shift his weight, milky thighs and calves tensing to accommodate the movement. He could just use his powers, but of course, he wants to do things on his own. 

There are things Reigen wants, too. And suddenly, it’s starting to become a need. 

The conditions are just too perfect. Reigen’s secret doesn’t feel like it wants to be a secret any longer, digging itself into Reigen’s frontal lobe like a parasite. Reigen might have to use force, but… but even if Mob screams and tries to fight back, no one will be around to hear him. Come save him. 

It’s a terrible thought and extremely dangerous and Reigen doesn’t want to hurt Mob; doesn’t want to scare him and make the boy hate the person he trusts most. But, his brain feels like it’s going haywire and those damn dogs are breaking free of their restraints and no one will catch them. Mob would never tattle anyway. 

When will Reigen ever get a chance like this again? 

“Mob, can you come here for a second?” He says it without thinking. The boy’s head turns around, eyes wide, and he places the notebook he’s holding on a lower shelf for now, heading over to Reigen’s desk. 

“Mhm. Is everything okay?” Mob asks, voice small. Can he sense Reigen’s intentions? The dark overwhelming thoughts that are leaking out of all his pores like black tar? 

Reigen takes a deep breath and stands up, walking slowly from behind the desk, almost stalking. His heart feels like it might jump out of this throat. Is he really going to do this? Is he going to take away this kid’s innocence and ruin him? Put his disgusting, perverted hands all over his skin until he’s just as sick as Reigen? 

When will he ever get a chance like this again? 

Mob has his hands pulled up to his chest, knees pressed together, worry lines creasing his brow. He might not know exactly what Reigen is about to do to him, but he knows something. The energy in the air like when a fox circles a defenseless lamb, knowing nothing of death, but knowing what terror is. 

“Shishou, is everything alright? If something is wrong, please tell me.” Mob sounds like he’s trying to stay calm, but his body is betraying him, shaking like a leaf in a storm. 

Reigen stays silent, quieter than he’s probably been in his entire life. He stares down at his student who looks seconds away from pissing himself and lifts a hand. Surprisingly, the boy doesn’t flinch, but he doesn’t move either. He stays frozen and shivering. Reigen has to grab Mob before the boy decides to use his powers. Reigen may deserve to die or at least be critically injured, but he won’t go down without a fight. Not until he gets what he wants. 

His hand runs gently through Mob’s hair, savoring the soft texture for a moment. The boy looks up in confusion before Reigen fists his hand in the hair and whispers, “I’m sorry,” as he forcefully bends Mob over his desk, forehead thunking dully against the surface. 

“Did I do something wrong, Shishou?” He asks genuinely against the surface. Reigen expects his voice to quiver or for him to be swallowing back tears, but he doesn’t. To be honest, now that Reigen is holding him down, Mob isn’t shaking as badly as he thought. Did his mind play tricks on him?

Reigen pulls both arms behind Mob’s back, pressing his chest against the boy. Mob breathes in shakily as Reigen runs a hand across his ass and squeezes greedily. Reigen can’t help a whimper that passes his lips, all 100 suns pulling him in. 

“You should know better than to wear these around me,” Reigen says as he roughly pulls up Mob’s shorts so the seam is between his ass crack, voice coming out more hostile than he intended. Mob doesn’t react, though, except for a muffled “mm,” and Reigen has to wonder if the kid has any self preservation. He has to know by now what’s going on. What Reigen plans to do to him. “They’re so slutty I can’t believe your school allows you to wear them. You make people want to do bad things to you when you wear them. You understand that, right?”

Mob’s eyebrows pull together in confusion. “No, why-?”

Reigen pushes his hips hard into Mob’s ass, pencil holder and stapler rattling on the desk, and the boy gasps, trying to pull a hand free from behind his back. But Reigen just tightens his grip on his wrists, digging his nails into crescents against the boy’s fragile skin. “You wanted me to do this to you, didn’t you? You wanted this. You came in here with those little fucking shorts and that pretty face and those soft thighs and didn’t expect me to lose my shit? Mob, I know you’re naive, but you can’t be that stupid.” 

Mob swallows, eyes going wide, cheeks darkening in the dim office. “I didn’t know….” 

Reigen pushes down Mob’s shorts, exposing his ass. It’s pale and round and velvety soft to the touch. Reigen groans as he slides his hands over Mob’s hips and down his thighs. He feels so disgusting , but Mob feels so good. 

As Reigen begins to hastily unbuckle his belt and unbutton his pants, he feels tears welling in his eyes. He swallows hard and clenches his jaw, keeping the surplus of emotion in for as long as he can. He wants this so badly, but he doesn’t want to hurt the kid. He can’t just shove his dick in and listen to Mob suffer. Reigen supposes he really does love Mob, even as he tries to rape him. 

“I’m so sorry,” Reigen says thickly, leaning forward to press two fingers against Mob’s soft lips. The boy opens his mouth hesitantly and Reigen sticks his fingers in, gathering saliva onto his fingers. He hadn’t thought to bring lube (never thought he would ever need a reason to) and the only other thing is lotion, but it’s on the other side of the room. So, why not use this as an excuse to feel the inside of Mob’s mouth? His tongue is so soft and slick, his cheeks slippery, his 12-year-old molars still growing in. Reigen feels his cock twitch to the rhythm of his heartbeat. “Please forgive me.” 

He removes his fingers from Mob’s mouth, a string of saliva stretching and snapping loose as Reigen pulls away and rubs both fingers against the boy’s entrance. 

“Shishou, what are you doing?” Mob’s voice truly sounds a bit shaky now, but Reigen isn’t sure if it’s from fear or general anxiety. 

“I’m trying to make this easier for you. Because I care about you,” Reigen says, plunging his middle finger in. 

Reigen swears he can feel every vertebrae in Mob’s spine snap into place. He tries to wrench both hands free, his right leg lifting and kicking feebly down onto the tile floor. Reigen grips harder on his arms, his other hand thrusting a finger in and out of his ass. Mob doesn’t make much noise, but when he does it makes Reigen’s eyes sting, the gravity denser, and the beasts in his chest snarl in delight. 

“I’m sorry. I’m sorry, it’ll be over soon,” Reigen says as he adds another finger, clapping the hand that was holding Mob’s arms back over his mouth as he sucks in a breath to scream. “I’m so sorry, Mob.” 

He continues to fuck the boy on his fingers, his own foot wedging between Mob’s tiny feet and kicking the insoles to widen his legs. Mob’s legs are quaking, but he spreads anyway, allowing Reigen easier access. Why is he just letting this happen? Is he that desperate for attention? Does he want to be popular so badly that he would let a dirty old man rape him just to say he’s not a virgin anymore? 

Reigen needs to fuck him. He seems prepared enough and Reigen can feel his cock close to bursting in his pants from the sight of Mob’s abused hole and the wetness dripping down his thighs. He continues undressing his lower half, pushing down his grey slacks and boxers. He gulps at the sight of precum beading on the head and spits in his hand, slicking up his painfully hard dick. 

“You have to believe me when I say I’m sorry,” Reigen pleads, breathing heavily as he pulls one of Mob’s ass cheeks to the side, lining his cock up. He’s so selfish. So horribly revolting and selfish. But, Mob is so soft and cherubic and Reigen wants to stuff him full until he’s leaking down his legs and is as diseased on the inside as Reigen. The man may never have psychic powers like Mob, but they’ll share this burden together.

He pushes in and that’s when Mob does scream. Reigen’s hand is tight over his mouth, but it does little to stifle the sound that echoes from within his nasal cavity. His hands come forward — not restrained by Reigen anymore — and scramble across the desk, trying to find anything to grab on to. Reigen is almost afraid he’ll snatch a pair of scissors or a pen to stab his assailant, but he just wraps his fingers over the opposite edge of the desk. Though, couldn’t Mob just kill him with his powers? He wouldn’t even need a weapon. 

Reigen braces a hand on his student’s hip, pulling back a bit and thrusting forward. He inches in further and Mob whimpers and kicks his legs like a toddler throwing a tantrum. Reigen can feel Mob sucking him in whether the boy wants it or not.

“God, you’re so tight,” Reigen breathes out as he gives another thrust, finally all the way to the hilt. “So warm inside.” 

He starts rocking his hips in a more even rhythm, the nerves of actually getting in Mob past. The soft smack of skin hitting skin and the huffs of Mob’s breath between his fingers makes him feel feral. He finally has him where he wants him. 

So, why does Reigen feel like he’s still moments away from crying? 

That’s when he feels something wet drop onto the hand against Mob’s mouth. Reigen slows his pace, leaning his head forward and turning the boy’s face to look at him. Fat salty tears sliding down his red cheeks, sweat gathering on his forehead, making his hair stick to the damp skin. 

Mob is crying. 

And now Reigen is, too. 

“Mob,” Reigen cries pitifully. “Shigeo, I’m so sorry for hurting you. I’m so sorry so sorry so sorry…” 

He continues his blubbering apologies until he feels something soft and wet touch the palm of his hand. Tears are still running down Mob’s face, but there’s that feeling again, and Reigen realizes that the boy is licking him. Little tentative licks to get the man to remove his hand. Of course Mob would never bite Reigen; would never hurt him. If anything, he’s a well trained puppy. 

Reigen removes his hand and stares in horror and confusion at the boy leaning over his desk, ass filled with his cock. 

“Why do you think this hurts me? You used your fingers in the beginning, didn’t you?” 

These are not the words Reigen had expected Mob to say. He was thinking more along the lines of screaming for help or asking why his employer was raping him . But instead, Mob is asking why Reigen thought fucking him would hurt him. 

“Because…, what I’m doing is bad, Mob. I shouldn’t be doing this. I’m… assaulting you. Does that not hurt you?” 

And of course, Mob bashfully looks away and says, “Well, I wish you would’ve asked me first. And maybe kissed me, too.” 

To say Reigen is at a loss for words is a gross understatement. Is this why Mob hadn’t fought back? Because he really was enjoying it; that he wanted it? 

With a couple warbled sounds and a hiss from Reigen, Mob pulls off the man’s cock and turns around. Color is high in his cheeks, his eyes red-rimmed and glassy, lips spit-slick and pink. He’s panting and as he looks up at Reigen he… smiles. And it’s a wide smile, a smile that cuts through Reigen’s sternum, decapitating the dogs in his chest until they’re silent. The secret isn’t a secret anymore to either of them. Reigen knows that. But, what’s different is that maybe the man didn’t have to take Mob by force. Maybe Mob has his own secret that he’s fessing up to now. 

And that’s a whole other horrifying thought. 

Mob lifts himself up on the desk, careful to move anything that might get knocked over in the process. He reaches his hand out and gently tugs at the hem of Reigen’s shirt. His other hand travels between his legs and in reflex, Reigen catches him by the wrist. 

“I didn’t hurt you?” Reigen has to ask. 

Mob shakes his head. “No.” 

“And I didn’t scare you?” 

Mob tilts his head to the side and considers Reigen’s question for a moment. Finally, he says, “You didn’t scare me. Just made me nervous. You’re kind of rough and you say weird things.” 

Reigen inwardly cringes. If only he had known Mob had wanted this, he would have treated him better. Been gentler, softer, loving. It would have been so much better if he would have just communicated. 

“Shishou,” the boy whispers and runs fingers through sandy blonde hair. “It’s okay. I’m okay.” 

“I’m sorry I didn’t ask you first,” Reigen whispers. “I never would’ve thought that- you’re just so young- and I lost control-.” 

Mob pushes his hips up into Reigen’s stomach and the man feels the boy’s small cock for the first time. He had been so obsessed with Mob’s ass and just the act of fucking him that he hadn’t given any thought to his dick in the moments before pushing the boy against the desk. Mob goes to grab his dick again and Reigen stops him. 

“Why do you keep stopping?” Mob asks, maybe a bit irritatedly. Reigen’s chest clinches at his innocence; his pure naivety. His neediness.

“Because we should stop. This is bad, Mob. You’re just a kid.” Even Reigen can hear how pathetic he sounds, begging a 14-year-old child to stop coming on to him, even after Reigen was the one to start all of this. 

Because, he is, isn't he? Mob isn’t to blame. 

The boy thrusts upwards again and makes a small sound in the back of his throat. Reigen tries to say something, to protest, to right the horrible wrongs he’s made tonight, but Mob looks up into the man’s eyes, spreading his milky legs wider, breaths becoming heavier and heavier. If he looks closer, Reigen can see a line of drool trickling from the corner of Mob’s mouth.

Fuck.

“Shishou, please.” There’s that incessant tug on Reigen’s shirt. Thst desperation. “Don’t stop. You feel so good.” 

This is just too much. 

“You want me? Is that really what you want, Mob?” 

Come on, kid. Don’t do this. I’m giving you an out right now.

“Yes, Reigen-Shishou,” Mob breathes, head starting at a slow nod and gaining speed as his eyes grow more hazy, hips becoming more restless. “It’s okay. I want you. I’ve wanted you for a long time.” 

He wants me, Reigen thinks to himself and nearly doubles over. How can a boy like sweet little Mob want something like this from a corrupted, disgusting man like Reigen? 

But, from the look in his dark, lustful eyes and the smear of precum now sticky on Reigen’s chest, there is no doubt. Shigeo Kageyama needs to cum and he wants it to be from his Shishou. Has Hell possibly frozen over? If he looks outside, will there be pigs flying? 

Mob cups Reigen’s face and wipes away tears that the man doesn’t even know he's shedding with gentle thumbs. The boy hums softly and leans forward, pressing an inexperienced kiss on Reigen’s lips. He pulls back to smile and rub the man’s face again, going in for another. This time, Reigen reciprocates, parting the boy’s lips and barely biting off a moan. How had he not already kissed Mob; let the boy’s velveteen tongue slip timidly into Reigen’s mouth, brushing against the man’s own tongue and behind his teeth? Mob might not know exactly what he’s doing, but he’s letting his emotions take control and they’re doing a pretty damn good job. 

Now that he somehow has a consenting Mob on his hands, he doesn’t want to fuck up and scare him away. 

He has to do this the right way, if there even is a right way in this circumstance. 

“Alright, kid,” Reigen sighs, pulling away and putting both hands on his disciple’s shoulders, the boy looking up at him, expectant. “We can do this. But, we’re going to do this correctly. I know… I know it may seem like I didn’t hurt you before in your eyes, Mob. But, I did. And I’m sorry. You can stop me at any time. I don’t want to hurt you anymore than I already have.” 

Mob bites his bottom lip, nodding a couple of times. Reigen isn’t sure how much the boy is comprehending and how much is sailing like a paper airplane over his head. But, his tune is still exactly the same: he wants his Shishou. 

“Let’s go to the couch, okay?” Reigen knows it’s not the best (meaning it’s not a bed ), but it’s all he can do for now. Mob begins to walk over to the cheaply made couch, taking Reigen’s hand in his. He’s so small, hands so tiny and pale and soft compared to Reigen’s that he feels the biting need to pull his dirty hands away, but the boy just tightens his grip and yanks Reigen forward. 

“What should I do now?” Mob asks, subconsciously pulling Reigen’s hand to his plush lips, eyes sinking low. He looks bashful, but almost like he’s playing a part; like he wants to appear as vulnerable as possible. Like he knows this is what makes Reigen weak. 

The man swallows and lets out a nervous huff before saying, “Kneel backwards on the couch.” 

Mob presses his knees into the seat, springs squeaking, elbows propped on the back rest, the bare skin of his ass and thighs prickled in goosebumps. Reigen smiles to himself. It’s a good look for the kid. 

“That’s right, Mob,” Reigen murmurs, placing both hands on the boy’s hips and guiding them. “Push back your hips, arch your back, breathe nice and slow.” 

He follows directions and Reigen is grateful that the boy is so keen on listening and abiding by the rules, especially when they come from Reigen. This is also a very good look for Mob, much better than any traumatic, terrifying situation Reigen had been fantasizing about. Instead of a fear-flushed face and whimpers to stop, Mob is blushing and shivering in anticipation. 

For me, Reigen thinks. This is all for me. 

There might not be any ferocious dogs in his chest now, but all 100 suns are very much intact inside Mob and their gravitational pull is becoming too much for Reigen; the pure lust and trust radiating off the boy almost like a scent. Reigen kneels down on the cold tile before Mob’s ass, dragging a hand across a perfectly molded cheek, laying a kiss there. Mob sucks in harshly on his next inhalation and braces himself. 

“Relax. Let me make this up to you,” Reigen says softly, hot breath on his disciple’s skin. Once he feels Mob’s muscles lose some of their tension, Reigen presses his tongue flat against the boy’s entrance. For a moment, Reigen can see the purpleish-blue light of Mob’s power flicker to life, but another quick flick of Reigen’s tongue has the light snuffed out and an unfiltered moan through Mob’s lips. 

“You like that, baby? Does that feel good?” Reigen barely has time to register his accidental use of a pet name for Mob before the boy pushes his ass back, searching for Reigen again, whimpering and wiggling his hips.

“Feels so good. Shishou, please.” 

Reigen licks up the seam of Mob’s scrotum, his perineum, and shoves past the slowly tightening ring of the boy’s hole. Spit drips down Reigen’s chin and smears across his nose and cheeks, but the messiness does nothing to stop him. Not with Mob begging for his Shishou, little cock twitching and dripping precum onto the cushion below. How could Reigen believe for one second that Mob never wanted this? It’s so obvious in the way he sounds and moves and practically grovels that he’s wanted this for maybe even longer than Reigen has. 

“You know you can say my name, right?” Reigen says, lifting his face out of Mob’s ass, peering up to look at him. The boy has his eyes tightly closed, lips set in a wobbly line, crease between his eyebrows. His fingers are fisted against the couch cushion and his muscles are beginning to tighten up again, all Reigen’s hard work at the boy’s hole for not. He pushes two wet fingers in, the muscles squeezing suddenly around him. 

Reigen brings his other hand forward, squishing Mob’s pliant cheeks between his fingers, and turning his face to look the man in the eyes. “Hey, hey, hey. None of that. If you want to do adult things with me, you have to be an adult about it.” 

Mob blinks his eyes blearily and flushes, trying to keep his hips still, trying to get used to the fill of Reigen’s fingers. Just to throw him off, Reigen curls his digits, pushing at Mob’s prostate. The boy yelps and arches his back, Reigen unable to suppress a smirk. 

“There you go,” Reigen purrs, scissoring his insides. “What’s my name, Shigeo. I need to hear you say it.” He takes his fingers out, wrapping his hand around his cock to jerk it completely stiff. Leaning forward, Reigen parts Mob’s lips and eagerly rolls his tongue inside, murmuring, “Shigeo, Shigeo, Shigeo,” into the boy’s mouth. 

“R-Reigen-Shishou,” Mob whines. 

Reigen softly shakes his head, tilting Mob’s face to kiss under his jaw. “Nuh-uh. My first name.” A kiss behind his ear. A kiss by his collarbone. 

Mob pauses before focusing his gaze on the man, pushing his hips all the way back, pressing his forehead to Reigen’s. He surprisingly doesn’t stutter as he says, “Arataka, I need you inside me. Now.” 

Reigen never thought being demanded by a child would be so hot. But, it is and he groans as he lines his cock up with Mob’s hole, feeling every tremble of the boy's squishy thighs. 

“Good boy,” Reigen practically growls, letting go of Mob’s precious little face and pushing inside. 

“Oh, god,” Mob squeaks. “M-maybe I was being a li-ttle over- uhn! Over- ah!” Every time Mob tries to finish his word, Reigen slides himself further inside, pulling a moan out of the small, sensitive boy. 

“Overzealous?” Reigen supplies Mob with the word, and the boy nods weakly, tears pricking his eyes. 

“Mhm.” He’s starting to actually look a bit panicky, chest heaving and stuttering with half choked breaths. His nails are dug deep into the couch cushion and Reigen can feel his hips wanting to pull away. Reigen knows he’s afraid now and he’s not exactly sure what triggered it, but it’s unmistakable. 

What should I do now? Mob’s words from earlier echo in Reigen’s mind. Yes, he’s the adult and in every situation he’s thought he would have to overpower the boy in some way. But, sometimes, it’s better for Mob to take control and Reigen thinks now is one of those times. 

“Do you… wanna stop?” Reigen asks. The words push past his lips, forcing their way out. The man doesn’t want to stop. He wants to keep going because, god, is it impossibly warm and tight inside Mob. Reigen doesn’t want to be a Bad Man, though, and if he doesn’t stop — if he doesn’t at least ask — he will be. He’s been given a second chance. He doesn’t want to squander it.

“No…,” Mob answers, dragging out the word nervously. “But, I don’t want to do it like this. I-I can’t….” And Reigen knows what he means. He can’t control this. He can’t even see Reigen’s face in this position. The boy’s hair begins to defy gravity strand by strand and the silvery, holographic hue of his powers shimmer in the moonlight filtering through the window. 

Reigen nods and stands up. 

The man makes the adjustments, sitting on the couch and gently pulling an anxious Mob into his lap. The boy has his hands pulled up to his chest, eyes searching Reigen’s face in the dark, waiting for instructions. Because that’s what Mob always does. 

Luckily, his powers have quieted down through Reigen’s proximity and gentleness; hair laying back down in place. 

Reigen makes sure his touch is soft as he tugs Mob’s legs to straddle either side of his hips; makes sure to keep his reassuring hands on the boy. He needs the confidence boost, Reigen can tell by the nervous twitch of his fingers and the rigidity in his spine. He doesn’t need to be having a psychic break for Reigen to realize how anxious he really is. 

“This should be better for you,” Reigen murmurs, pressing a kiss to Mob’s chest, one hand on his thigh, the other holding the small of his back. “You can control this. Show me what it is you want, Shigeo.” 

And for the first time, Reigen thinks that this is how it’s supposed to be. Reigen is an adult and constantly makes decisions for the both of them, keeping Mob’s best interest in mind, always. But, in something like this, Mob should be the one to take the reins; go at his pace. 

Hesitantly, Mob’s hands slide up Reigen’s arms, barely grazing his fingertips against the skin, and settling on the man’s shoulders. His eyes dip down to their crotches, gaze lingering on Reigen’s pubic hair. One of the boy’s hands comes down and pets at it. Reigen isn’t sure if it’s supposed to be sexual or if he’s just curious, but the man groans anyway. 

“Blonde…,” Mob murmurs and Reigen looks at him in confusion. The boy flushes in embarrassment, but doesn’t take his hand away. “I didn’t think the hair there would be blonde.” 

Reigen chuckles. Mob is always so endearing that it almost hurts, always noticing the little details no one else does. Reigen brushes back Mob’s dark bangs and asks, “You wanna know how you can tell the color of someone’s pubes without actually looking?” 

Mob blushes even more deeply, but nods anyway. 

“You look at their eyebrow color.” Reigen swipes a thumb over Mob’s black eyebrow. 

“That’s a little humiliating,” Mob remarks, ducking his head away for a moment. The hand in Reigen’s pubes now hovering over Reigen’s erection. Sitting side-to-side, it’s obvious how much bigger Reigen is. It was expected, obviously, given how much younger and smaller the boy is. But, seeing it right in front of him, their cocks pressing together, Mob’s foreskin pulling down just a tad to expose a pretty pink head, black wispy tuft of pubes right above, Reigen is enthralled. Reigen loves him. 

“Do you need help, Shigeo?” Reigen says the boy’s name and Mob shivers. 

“Yes, Arataka,” Mob replies and it’s Reigen’s turn to tremble. There’s something so intimate in a name and it seems they both believe in that. 

Reigen reaches over to the little side table by the couch, grabbing onto the plastic nozzle of a lotion bottle. It reads that it’s nontoxic and unscented so it’ll work. It may not be lube, but it’ll work. He slicks both their cocks in it and Mob practically jumps out of his skin, hands starting to glow with power. 

“Here,” Reigen says, trying to ease the boy. “Put your hand over mine. I’ll teach you something.” 

Mob does as he’s told, following Reigen’s motions as he pumps his hand over their dicks, needily bucking his hips upwards. His eyes are becoming hazy again, muscles beginning to relax. Through Reigen’s touch, Mob’s nerves are easing, tension and awkwardness melting away. Reigen smiles, still in awe over how much this kid trusts him with every fiber of his being. Reigen isn’t sure if kids can grasp the entire concept of romantic love, but he wonders if maybe Mob has a clearer picture of it than even some adults the man knows. The way he looks at Reigen every time their eyes meet, Mob seems to know a bit more about his Shishou than he lets on. 

“I’m going to be honest with you- ah,” Mob huffs. “I don’t think I’m gonna- mm!- last much longer. Should- should I put it in…?”

And Reigen stops moving his fist and says, “Only if you want to.” It’s true. Right now, Reigen wants whatever Mob wants. 

Please say you want to, Reigen thinks to himself anyway. 

“I do.” Mob’s voice cracks a little, but he doesn’t shy away. Instead, he leans forward and pants in Reigen’s ear, “At first I was too in shock to realize how much it really did hurt. Then, we tried again and it made me worried that maybe we wouldn’t be able to do it again… and you wouldn’t want to do this with me anymore.” The boy’s unsure words are erased as his teeth sink into Reigen’s earlobe. His voice is hot and much more mature than Reigen’s ever heard it before as he says, “But, Arataka-Shishou always knows what to do to make me feel better. Even when he thinks he’s a bad guy, he’s not.” 

“Ahh, Shigeo,” Reigen moans and tilts his head back as Mob begins to kiss his throat, shifting so Reigen’s cock is resting against his ass. “You really think that about me?” 

“I know that about you. I didn’t lie when I said you’re a genuinely good guy.” 

“Listen, kid,” Reigen says, finally reaching his limit. “I don’t mean to be vulgar or ruin the moment, but I really want to fuck you. Can we hurry it up just a bit?”

In a tone only Reigen can detect as joking, Mob says, “I thought you’d never ask.” 

“Yeah, yeah,” Reigen replies, flushing at Mob’s sudden use of sarcasm. “Just don’t hurt yourself. Know your limits.”

Mob heaves a breath as he lines up Reigen’s dick with his hole, surprisingly both still wet. He pushes his hips down and they both vocalize; Reigen a hiss, Mob more of a sob. Reigen grips onto Mob’s hips, stabilizing the boy. Mob breathes through it, sweat gathering on his top lip. Reigen feels his cock twitch inside as Mob lowers himself further, keeping his own hips from thrusting upwards, ruining everything. 

When Mob has lowered himself fully onto Reigen, the boy dips his head forward and rests it on the man’s shoulder. He murmurs, “I feel so full,” against Reigen’s skin. Normally, the man would think Mob is just stroking his Shishou’s ego, but seeing and experiencing how sensitive and small Mob is, Reigen doesn’t doubt him for a second. Reigen might be average at best, but it’s huge in comparison to a 14-year-old virgin who weighs maybe 110 pounds soaking wet. The man doesn’t think Mob is accustomed to inserting anything in his ass, either which makes the fit even tighter. 

Before Reigen can even formulate the words “do you feel okay?” Mob answers by throwing his head back and moaning, “But, it feels so good.” 

“Lift up and down, baby,” Reigen pants, getting more into it, worrying less about Mob’s wellbeing as he can blatantly see and hear the boy enjoying himself. “The friction will feel even better.” 

Mob moves his hips up, a humming moan just behind his teeth and lips, thighs tensing with the movement. Back down, and Reigen can practically feel every inch shoving in. He takes a bit more lotion in his hands and rubs up under Mob’s ass, slicking him up again to make the slide a bit easier. It does it’s job, the boy grinding his hips with ease now. His cock is dripping, precum slipping down the front and pooling on Reigen’s stomach. 

“God, you’re so sexy, Shigeo,” Reigen says, voice low as his hips betray him, tipping upwards into Mob. 

The boy lets out a breathy little “uhn,” at the movement, but doesn’t show any sign of distress. He peers down at Reigen and points a feeble finger at himself. “Me? You think I’m sexy?” 

Reigen chuckles, the sound vibrating within both of them. “Of course. It’s one of the reasons I’m having sex with you. Why have sex with someone if you don’t find them sexy?” 

Mob stills his hips for a moment, rolling around Reigen’s question. Eventually he nods and leans forward again, kissing between Reigen’s eyebrows. He pulls away with a smile — that 100 sun gravitational pull of a smile — and whispers, “I think you’re sexy, too. But, you already knew that.” 

“Shigeo,” Reigen says, a bit desperate, “can I take over for a moment?” Because no matter how good Mob’s immature little bounces feel and how cute he is testing things out, it’s not getting Reigen anywhere near the edge. 

It only takes a single nod for Reigen to be sitting up, pulling Mob close to his chest, and thrusting hard into the kid. Mob clenches again, but Reigen is too far gone. He doesn’t have the patience to confirm that his disciple is okay, too ready to fuck the kid’s brains out, maybe get him to shoot out a spark or two. Though, telling by the way he follows through with every one of Reigen’s strokes tells enough. It also occurs to Reigen that he’s the only one who knows how much of a slut Shigeo Kageyama is. Now that’s a thought. 

Meeting a particularly deep thrust, Mob cries out, nails digging into Reigen’s shoulder, his tiny feet kicking around. He’s close, Reigen can feel it in the incessant squeeze around his cock, sporadic bucks of his pelvis, bottom lip between his teeth as he lets out a harsh “fffff” noise. Mob can sure have hot sex with his 28-year-old mentor in his office, but god forbid if he says the F-word. 

Reigen thinks it’s the cutest, most endearing shit he’s ever seen with his two eyes. 

“Say it.” It’s a demand, not a question. 

“W-what?” 

“Say it. I wanna hear you say ‘fuck.’” Reigen isn’t sure why he’s so determined to hear the kid say it, but he believes he might blow if Mob does. 

“I couldn’t-,” Mob begins to say and is cut off by Reigen grabbing his hips and pushing swiftly back down, drawing a sharp “ahn!” from his throat. 

Reigen brings a hand from the boy’s waist, tucking a stray hair behind Mob’s ear. “C’mon, baby. You can say it when we do this, but only when we do this. I wouldn’t want to be a bad influence on you.” 

Pressure is beginning to build in Reigen’s abdomen and he dips his head down to capture Mob’s nipple in his mouth. He swirls his tongue around it, sucking just enough to get the kid squirming. 

“W-would that be sexy for me to say, Arataka? For m-me to say a bad w-word?” Mob stutters, but his voice takes on that mature deepness from earlier. He buries his face in Reigen’s hair and breathes in deep. “Y-you’re not gonna- gonna hurt me-e if I say it, right, Ara- Arataka-Shishou?” 

Is Mob trying to dirty talk? Shigeo really is a slut. Reigen can’t believe that he can reduce Mob to such a state, saying such lewd things and crossing his misty, lustful eyes in fucked out bliss. 

Reigen feels his face being pulled upwards, coming nose-to-nose with the boy in his lap. His gaze keeps darting from Reigen’s eyes to his lips. His own mouth starts trembling, like he’s mustering up the courage to say something. 

Finally, Mob says, flicking a finger to run a touch of power against Reigen’s jaw, “I want you to keep fucking me, Arataka.” 

Reigen has always impressed the importance of good timing on Mob, and as always, the boy is a rule-follower. As he whimpers Reigen’s name into the dark room of the office, hiding his tomato-red face as he cums like he never has before, Reigen only has a couple of seconds before he’s scrambling to pull out. 

He grits his teeth and grinds out, “I’m about to cum, kid. We aren’t using a condom, so you need to move.” 

Mob doesn’t move. Instead, he continues to hide his face, tightening his thighs around Reigen’s as he says, “I told you to keep fucking me.” 

Ah, shit. Ah, shit. 

“Shigeo…,” Reigen begins, but shakes his head. If the kid wants it, he wants it. And it’s not like Reigen has ever had an STI before, his body count is embarrassingly low for an almost 30-year-old man. 

Without much prompting, Reigen climaxes, cumming deep inside Mob. “Oh, you’re so good, feel so good. Ah, Shigeo, you're such a good boy for me,” Reigen babbles, careful not to dig his fingers too deeply into Mob’s fragile skin on his back. 

“Uhn… Shishou, I’m gonna- again- I feel it-.”

“It's alright,” Reigen soothes, the desperation to cum having passed for him. “Look at me when you do, baby. I wanna see what you look like when you cum.” 

Mob yelps and removes his hands from his face, eyes fluttering shut, jaw falling slack. Reigen can’t help the pull of his hand towards Mob’s twitching erection, the immediate contact making the boy spurt another load between them. He’s gasping Reigen’s name in all forms and then he’s… thanking him. 

“Thank you,” Mob says, a hint of a sob in his voice. “Thank you so much. I’m so grateful, Shishou.” 

He’s starting to sound a bit hysterical, hands fluttering around, suddenly unsure of where to look or touch. It isn’t until Reigen puts both large hands around his squishy little waist, pulling him up and off with a moan, and kissing his soft stomach once, twice, three times, that Mob begins to calm down. 

“I should be the one to thank you,” Reigen murmurs, looking up almost bashfully at Mob. “You did an amazing job.” And because Reigen loves to fluster the boy, he adds, “I’m so proud of you.” 

Mob does blush at this, wiping a restless hand across Reigen’s thigh. He looks away, considering his next words carefully and looks back down at the man with a hopeful and determined gaze. He really is pretty, Reigen thinks to himself, heart swelling as large as the 100 suns that rest beneath Mob’s skin. 

“Um…!” The boy begins, but seems to second guess himself. He shakes out his hands and sighs before continuing. “Can- can we do this again? I really liked it. I… really like you, A-Arataka-Shishou.” 

Reigen puffs out a breath of air, and juvenilely hides his face in Mob’s soft stomach. “Oh, Mob,” he whispers and the boy tenses. Reigen lovingly soothes his fingers up and down Mob’s back. “You know I could get in trouble for how I feel about you, right?” 

Mob is silent for a moment and then nods. But, it seems he’s not going to go down without a fight. “I promise I won’t tell anyone. Not until I’m older. Because I won’t stop feeling the way I’m feeling. No matter what. Reigen-Shishou, I’ve had these feelings inside since I was 11. Please,” Mob says, looking down at Reigen, pushing the man’s chin up with his powers. He locks eyes with him, dark and deep as the ocean floor as he finishes, “Please let me love you the way I always wanted to.” 

“You can’t tell anyone,” Reigen says, voice firm and immovable. 

Mob nods and his chest heaves up in a sudden breath. 

“Not your parents. Not Ritsu. Not Teru. Not anyone. I will love you in every way you want if you can promise me this and that you’ll follow my directions to keep us safe.” 

Mob breathes out shakily and nods more enthusiastically. “I promise.” 

Reigen smiles so easily and in such relief that he almost sobs right there with Mob in his arms. “Alright, baby,” Reigen says and softly slaps Mob’s ass, making the boy yelp and flush deeply. “Let’s go get some ramen and I’ll take you home.” 

Mob smiles just as contendly and smacks a kiss on Reigen’s mouth. “Let me spend the night.” 

Reigen pulls away and wags a finger at his disciple. “Let’s not get too hasty, Shigeo. We’re already pushing our luck.” 

If I could tonight, I would, Reigen thinks and begins redressing Mob. Just be patient. 

And for the first time in three years, Reigen doesn’t hear dogs howling from within his chest and gives in to the 100 suns inside Shigeo Kageyama.