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Denki isn’t sure where the habit of popping batteries in his mouth came from exactly, aside from the obvious fact that he had an oral fixation. His earliest memory of sucking on a battery was when he was roughly five years old. He had this little animatronic toy, a cute silver and purple fox that walked robotically behind him and barked at random times. He named it Tama—which his dad said was a name for a cat, not a fox—but he didn’t really care.
Tama was his favorite toy for months . He constantly carried it around or had the thing chasing him inside the house. Even brought it into bed to sleep with. But after a while, Tama’s batteries ran dry. Since Denki’s Quirk was a bit more volatile and powerful (not to mention nowhere near as easy to wield) as his mom’s Quirk was, she was usually the one to give all the electronics in the house a small zap to get them working again.
Denki remembers one day in particular, when she’d been called away before she could give the batteries she pulled out of Tama’s belly compartment to help Denki’s father with something and the boy had just...shoved the batteries in his mouth. It was sort of his thing, and something his parents were attempting and failing to curb, this strange desire to just put things in his mouth.
Suck on them, roll them around with his tongue, press them to the backs of his teeth. It was sort of soothing to Denki and also sort of fun, a good distraction that he could focus on while doing something else without his attention fully dropping from either project. As a kid, he’d pitched a hell of a fit when his parents tried to wean him off of his binky and after, his fixation had manifested in refusing to take the little plastic spoon out of his mouth after eating and other such habits.
But the batteries were the best for some reason. Denki thinks it has something to do with the familiarity of electricity and the tang of metal on his tongue. So, though his parents were worried about him choking on the small objects, eventually Denki and batteries just became a...thing. The habit became as much a part of Denki as the lightening bolt streak in his hair or his Quirk itself.
Conveniently, his Quirk allowed him to charge up batteries that way and—much in the same manner that his friends sheepishly asked him to charge their phones—Denki was often given handfuls of batteries for him to bring back from the dead. This extended to the 1-A dorms as well.
Each person had their own special type of battery they’d give Denki. Iida favored D batteries, as he liked to tinker with radios and transmitters. Jirou gave him 7-volts for her boomboxes and musical equipment.
Sero kept a bunch of AAs and those little lithium button cells for his various portable gaming systems but Denki had been banned from sucking on the button cells after a slight incident where he maybe...kinda...sorta...swallowed one. Or, well, three. Bakugou had tried to stop him from playing with batteries entirely after that by threatening to explode his face (a sign that “Kacchan” cared, in his opinion) after loudly exclaiming that the round batteries were tic tacs, but after a while he grew to accept the habit like everyone else did and even threw some camera batteries at Denki now and then when he wanted to get good pics of the hiking trails he went on with his dad or Kirishima.
There was one person in the class though, that went through...a lot of batteries. Quickly. And always the same type, AAAs: Deku. Midoriya had never really explained what he did with the batteries and try as he might, Denki couldn’t really think of something that ran through batteries quickly or needed like a dozen just to work.
Since it was Midoriya, he figured it must be All Might-related. Like he had a bunch of little action figures that said All Might’s catchphrase or maybe the batteries were for his alarm clock. Really the only other option was like, sex toys and while the idea of Midoriya using toys on himself was...nice, like really really nice, Denki shouldn’t be thinking about it in public spaces kind of nice...he doubted that was the case. It was Midoriya for crying out loud!
Shy sweet, innocent Midoriya! With his big green eyes and his long dark lashes that fluttered prettily and his cute little freckles on those round cheeks that Denki wanted to kiss and maybe nip at affectionately—he’s getting off track!
The point was, Midoriya just seemed too soft and naive and easily flustered to use sex toys . Hell, Denki’s pretty sure the boy would melt into a pool of embarrassment if he so much as hinted at that pure being putting those batteries to good use in a vibrator. It just didn’t fit the curly-haired boy’s cherubic image! Though that sort of fell into the category of gap moe, making Midoriya even more charming. Man, Denki’s crush was kind of getting out of hand huh?
He blames Sero for enabling him, always teasing him about looking at Midoriya’s ass in the locker room, which he TOTALLY doesn’t do...that often...really, he swears! But Sero looks at Midoriya just often and he’s been quoted as telling Denki straight to his face that he’d “definitely let Denki Detroit-smash that” and then they’d both laughed for three minutes about how stupid a joke that was before Sero admitted with a slightly nervous smile that he was being serious.
That he was totally okay with Denki getting with Midoriya if the opportunity to do so ever came up. Knowing that Denki had full, and in fact pretty enthusiastic, permission to fool around with the green-eyed cutie had definitely made the blond’s crush make itself known often and intensely. Especially since Sero had hinted at all three of them getting together for some fun.
Man, Denki could picture it; Midoriya in between them like a sexy sandwich, Sero’s big hands holding the boy up by his thicc (that’s right, with 2 cc’s) freckled thighs because Sero was so damn strong and then Denki could rut against Midoriya while he watched the boy kiss his boyfriend and learn just how talented a tongue the taller boy had...yeah. Denki bit his lip and shook his head to clear it. Now miiiight not be the best time to fantasize.
Denki’s eyes shift to the small pile of AAAs sitting on his desk, Midoriya had handed them over after Heroics class, his blinding angelic smile thanking him once again, promising to pick them up later that night. The clock by his bedside read that is was about an hour till curfew, Midoriya wouldn’t come around for another half hour but Denki had finished charging them up while he worked on translating English homework.
He leaned back in his chair and stretched his arms up over his head, he could spare Midoriya the trip and go drop them off himself, and then swing by Sero’s room. Yeah, then he could spend the night in Sero’s room, his thoughts shift again and he can feel his dick twitch as he thinks about his boyfriend's long fingers trailing over his body throughout the night.
He jumps up quickly, mind made up and a slight flush to his face as he scoops up the batteries and closes his dorm door behind him. He slid into the elevator with a slight nod to Ojiro who was coming back from the gym, a towel around his neck. Denki was a bit worried about going to Midoriya's early but at worst, Midoriya was probably studying.
When the elevator dinged, Kaminari flashed Ojiro a smile and wished him goodnight before heading over to Midoriya's door. He had just passed Mineta's room then he heard what sounded like a moan. He chuckled under his breath, leave it to Mineta to be watching porn. Denki was pretty sure it was all the other boy did. He used to be like that, though not as bad, before he and Sero decided to date.
He moved to Midoriya's and was surprised to hear that the sound gets louder. Breathy, sweet moans. Wait a minute was...was MIDORIYA the one watching porn? Woah, woah, woah. Like Midoriya was a guy with needs like any other but...it was still Midoriya .
Denki suddenly was filled with the desire to know what kinda porn Midoriya watched. Was it real vanilla, with a story? Or maybe he was a closet freak, watching like hardcore foreign BDSM stuff that was totally at odds with his whole goody-two-shoes thing. Or maybe he was into roleplay? Secretary pounded on the boss's desk, nurse and doctor stuff?
Carefully, so as not to make too much noise himself and break Midoriya out of his jerking off session (he had a cute cock, Denki was sure of it even if he hadn't gotten a good glimpse in the locker room) Denki pressed his ear to the door with the dorky little All Might nameplate to listen better.
"Ahh~D-Denki! Yes, just like that. Mmmnn, fuck me Denki, fuck meeee !!"
Holy shit! Denki reeled back as if he'd been slapped. Did he just?? No. No there was no way he heard...Midoriya didn't, he couldn't be...Denki swallowed and put his ear back to the door, hand falling to rest on the handle. Almost like magic (it wasn't on purpose, it wasn't , he promises!) his hand falls in a sort of twisting motion and the door slips open a crack.
He...well he didn't mean to peek. But he kind of has to now, right? Since the door is already open a little and whatnot. Denki licks his lips and angles his face to peek inside. He nearly cums on the spot and he knows for sure that the blood is rushing fast to his cock as he sees Midoriya sink down onto a bright yellow dildo slow and steady with a quiet moan.
"Please, Denki. Use me. Wanna feel you nice and d-deep." The boy begins to bounce quickly, curls flying, and Denki notices there's a little pink wire taped to Midoriya's thigh. He follows the wire and sees a pink vibe on Midoriya's cock, buzzing away in a cheerful little blur as the boy fucks himself on the bed.
Denki can hardly think and it takes a few seconds for him to register that this is real and not some vivid wet dream. But that's really Midoriya, really IZUKU, a cock shoved up his tight ass as he cries out for Denki. The blond can't help but let out a moan at the beautiful sight before him.
Izuku turns to face him with wide eyes and flushed skin, embarrassed, but then Izuku looks Denki up and down. Takes in the blushing face, half chub in his pants, and his uneven panting as he leans against the doorframe, clutching it like a lifeline. Izuku's plush parted lips upturned slightly and he wets his upper lip, watching as Denki’s eyes follow the motion. The parted lips and harsh swallow as Denki tries not to drown in his own saliva. Then Izuku is all seduction and enthusiasm.
He flashes Denki a kilowatt grin, like he's been expecting Denki, like he planned for this, and crooks a finger.
"Denki~you came!" Izuku purred and it took every bit of his willpower not to say something ridiculous and mortifying like 'yeah, pretty sure I came as soon as you said my name.'
“Y-yeah, I-I was going to-to drop these off before curfew,” Denkis feels like his brains short circuited as in his trembling hands he holds the AAAs. As he began to explain himself, Izuzku started rocking back slowly, sinking back down into the neon yellow dildo, his eyes slowly shut and hummed “T-thanks! I’ll definitely need them,” He let out another moan, the humming of the vibrator constant background noise “One never l-lasts as long as I need it to—finish,”
He twisted his torso to the doorway, head falling to the side slightly and lazily opening his eyes to be half lidded, he whispered out, “Unless you can last longer than the batteries can?”
Kaminari must have died and this is heaven because there is no way—
“Kamikun?”
Okay. Okay. Yup, this is heaven. Kaminari, mouth still open gives Midoriya a slight nod and tumbles into the room quickly, his foot kicking the door behind him and while doing so. Then his foot hit the bedframe and he tripped over his own feet trying to right himself, hands flying out to catch himself, they grab the first thing they hit which conveniently is the bed's frame.
The bed Izuku was riding a dildo on.
With his hands on the edge of the bed, Izuku's parted thighs shiny with precum from his cute cock and lube from his hole were presented quite nicely right in front of his face. He reeled back, but Midoriya grabbed the collar of his shirt, forcing him to look up at him.
Both their faces were flushed but Midoriya’s eyes held a certain fire to them. “Well? Is that a yes then?”
Denki nodded, he licked his lower lip, eyes glancing back down Izuku’s torso “Y-Yes.”
“Good,” he purred and Denki found himself being manhandled back to his feet, he stood at the edge of the bed and Izuku’s hands flew to his belt, tangling in it and undoing it in record time and shrugging down his pants and underwear to free his cock. At the same time, he pulled his shirt off over his head and tossed it behind him. He stepped out of his pants and kicked his underwear to the side, letting Midoriya guide him the whole time. He was already at half mast from just Midoriya moaning his name, so when scarred hands then wrapped around his dick it twitched and he let out a puff of air.
Izukus worked him to full hardness, glancing up before leaning forward and licking a stripe from base to tip.
“F-Fuck! Midoriya!”
“Izuku. Call me Izuku,” Midoryia murmured as he wrapped a hand around the base and then sucked him down, gagging slightly but still managing to get him all the way. Denki moaned, a hand flew up and tangled in green curls and he couldn’t help the involuntary thrust his hips did as the velvety wet heat sucked up down.
“Th-then call me D-denki!”
Izuku bobbed his head a few times, grabbing Denki’s thighs to allow him to go as deep as he could, all the while Denki tangled his finger in curls to guide him, softly rocking, lips parted and moans falling from his mouth all-the-while he watched his dick in those pillowy lips.
Finally heat coiled in his gut and Denki breathed out through ragged breaths “—Zuku, go-gonna come, d-don't stop! Please!”
Izuku hummed around him, eyes glancing up and shimmered with mischief, he pulled off and Kaminari nearly wailed at the loss of wet heat so close to his orgasm.
“Tsk, be patient Denki and you’ll get your reward,” he hummed as he tugged him onto the bed. Denki gracelessly tumbled onto the bed, Midoryia peppering kisses to his shoulder and chin as he maneuvered him on the bed, situating him at the front headboard with him sitting upright. “Remember, you have to last longer than my other toys Denki-kun.”
In their situating, the neon dildo had fallen out and off to the side, Izukus spared it a glance and then grinned back to Kaminari. He climbed into his lap, grinding down into his erection, his hands gliding up, Kaminari's torso, and then finally wrapping around the back of his neck.
Their noses were just inches apart, panting breaths filled the same space as Denki glanced back and forth from Izuku's lustful gaze to his lips and back before finally leaning forward and capturing his lips, licking into him feverishly, his own hands gripping into either side Izuku's grinding hips.
They both moaned into the kiss and Izuku opened his mouth, letting Kaminari explore every inch as Izuku slipped an arm down between them, he fisted Denki's cock a few more times before pulling back and glancing down.
Denki blinked, a little lost in the haze of it all until he watched Midoriya line him up and then slink down slowly onto him. The heat was what settled a fog of pleasure over his mind first, followed by a fascination as that deliciously tight hole stretched around the head of his cock.
"Fffuck, 'Zuku," he whispered, torn between the need to capture his mouth again and never stop looking at the way that pretty, perfect little hole devoured his cock like it was it's last meal. And the further Izuku descended, the more Denki wanted to just cum right then and there; every inch of his dick that Izuku slid down on felt better than the last and that amazing ass fluttered around him teasingly when he bottomed out.
Judging by the knowing smirk on Izuku's face, he was tightening up on purpose just to mess with Denki. Massaging his cock better than anything else—granted all Denki had to compare the feeling to is his hand, Sero's, and the shared pocket pussy that he'd gotten as a joke for him and his boyfriend's anniversary but secretly hoped they'd make good use of in the bedroom (and they certainly had.)
But Izuku's ass was much better than a hand or a cheap sleeve of plastic drenched in lube. Fuck, IZUKU was better than that. Gods, he was so fucking pretty like this, sitting on Denki's cock like he owned it. Like Denki was made with the sole purpose of pleasing him. If possible, the thought made him harder and he twitched inside of Izuku, prompting the other to laugh.
And wasn't that an amazing feeling? Izuku's laughter was a charming gift on its own but feeling it? Shit! The muscles inside him contracted around Denki's cock and he moaned pitifully, hips jerking up in short quick motions. He didn't want to rush Izuku in case he hurt the boy but fuck, he felt so good inside and that dildo had been so fucking big and please, please, please, he needs to fuck Izuku now or he'll cry.
Izuku smiles and pecks him on the lips, a hand coming up to play with the blond hair just above the back of Denki's neck. "Oh, sweetheart, I bet you'd look good all teary but I don't want to tease you too much...not this time, anyway."
It took a moment for Denki to realize his begging had been verbal and that Izuku had just implied this wasn't a one time thing, that he'd get the chance to fuck this ass again, kiss Izuku's sweet little freckles and his pouty lips. The moment was all Izuku needed to start rocking in place though, hand tightening in Denki's hair as he leaned in to whisper in his ear.
"Fuck me, Denki-kun. Make me feel you for the rest of the week."
"Shit, shit, fuck!" Denki cried out, gripping Izuku's waist hard and thrusting up furiously, hell-bent on channeling all his energy into fucking Izuku so good that he came crawling back for more again and again. Let Sero join. And shit, wouldn't that be a beautiful sight? Izuku on his hands and knees crawling towards Denki and Sero to lap at their cocks and beg for their cum.
Izuku keened at the sudden rough treatment, clutching his friend tight and grinding his hips down to get Denki's shaft hitting his good spots. His sounds were so cute and so sexy and when Denki shifted forward to press Izuku down on the bed and the change in angle let Denki drive into Izuku more fluidly. And with greater intensity.
The moans and whines of pleasure from Izuku grew louder as Denki grunted and thrust hard into the boy beneath him. Now it was his turn to grin, the high of taking Izuku after all his fantasies and knowing that Izuku liked him back (that he wanted this, wanted Denki to fuck him) turning him on and making his blood run hot.
"You like that, Izuku? You like my cock?" he asked, feeling smug that his answer was already in Izuku's dark lust-blown eyes and his sweet cries for more, harder, deeper.
Denki could feel an energy start to build low in his abdomen again, a rolling heat of ecstasy and pride in making Izuku come apart below him. It thrummed in his veins hot and heavy and he didn't have time to register the familiarity of it before it was too late, his desire to please Izuku and chase his own pleasure too great.
Before he knew it, the energy was pushing its way out of him and his body began to glow and crackle with excess electricity. His hair began to stand up, floating around him as thin tendrils of electricity zapped the bed and the wall beside it. Izuku clenched around him beautifully when a stray arc of it hit the pink vibe on his cock and amped it up to full blast.
The buzzing mixed with the crackles of Denki's Quirk and Izuku moaned low and sultry, eyes tearing up from pleasure as he furiously brought his hips back to fuck himself on Denki's cock as the vibe made his own dick jump and leak precum like a faucet onto his stomach. Denki should have known that Izuku got off on Quirk use and he made sure to bring his hands to Izuku’s chest, thumbing over his nipples to send little shockwaves through the boy and stimulate him even further.
Izuku was already shaking with the overstimulation of the bullet vibe and Denki pounding into him so when the blond caressed his chest, trailing up and gently sparking his sensitive body, his body seized up. The jolt of electricity enough to send him over the edge, and grip tightly onto the blond as he came with a gasp, and eyes fluttering shut.
Kaminari slowed to a grind as Izuku clenched around him, body jolting with little aftershocks, no doubt coming down from a wonderful orgasm high, but he was chasing his own, so close. And with Izuku so hot around him, and clenching almost painfully around him Denki’s pushover was hearing Izuku’s sultry moan and seeing the green curly head slumped forward.
Denki leaned back, eyes closed and Izuku slumped on him, the two still connected as they both slowly came back to their senses, and panting breaths slowed.
Denki felt his senses return one-by-one as lips pressed again and again on his neck, gently nipping and licking up and down his throat and nibbling down to his collarbone. “Zu?” He slurs and moves a hand onto his lower back. “What ‘re you doin’?”
“Mmh?” He hums, preoccupied with sucking a small mark just under Denki's jaw. The blond's first thought is to protest because he doesn't want anyone getting ideas and then his mind focuses on just how nice it feels and how much he'd actually love to tell the entire school that he fucked this beautiful boy.
Especially Sero. His boyfriend is going to be so jealous and there might be some good fast, jealous sex and then mayyyybe he can turn on the old Kaminari charm and get Izuku to agree to a threesome. Fingers crossed.
As if summoned, Denki hears his phone go off with the specialized ringtone he has for Sero and yes, it's a Vocaloid cover of the Spiderman theme song. Sero keeps trying to get Denki to change it and he's never going to. Denki lets his head loll to the side so he can spot his phone sticking out of the pocket in his pants just beside the bed and waved a hand haphazardly to try and reach it, to no avail.
Izuku however, had an easier time grabbing it, shifting and stretching out his arm to snag the phone without actually getting off of Denki's cock. It was pretty impressive. Boy was bendy! Denki liked that in a man. Denki smiled at Izuku and held his hand out for his cell but the boy only answered it on the fifth ring and held it in the air between them, tapping the speaker.
"Denki's phone~ Izuku speaking," he answered playfully.
"Izuku? What, uh...um, can you get Denki for me?" Sero's confused voice asked and Denki raised his eyebrows as if to emphasize the request.
Izuku just hummed and gave another clench on Denki's spent cock, making the blond moan at the oversensitivity, and Izuku sat up straight in his lap.
"Denki can't cum right now, but you sure can if you head over to my room." Izuku smirked down at Denki before continuing, "My stamina is pretty high. I go through toys quickly. Think you can last longer than my new pretty little blond toy, Hanta-kun?"
Denki could practically hear his boyfriend's boner on the other end of the line and he let out a little chuckle when Sero cursed and loudly throw open his door to race to the elevator.
"See you soon, babe!" Denki called cheerfully. All he could do now was wait for his refractory period to end so he could fuck Izuku again, with Sero at his side this time.