Archive of Our Own

Oh boy. For what might have been the first time, Genos has no clue what to do.

He was kneeling beside his sensei’s futon, hand still holding up the heart-print cover, staring at his sensei’s sleeping body. His sensei was so innocently snoring away on his back, scratching at his shirtless abdomen. Genos had been trying to wake his sensei up to get to a time sale that they had agreed to double up as a date since they hadn’t gone out in a while besides to do Hero work. They were in an established relationship, going on informal dates and light kisses, some cuddling. Their futons were closer together and sometimes they would cuddle in the night; but there was nothing more than that. And here Genos was, faced with his greatest adversary.

Saitama’s boner.

‘Morning wood is common among males in their sleep and it may correlate to wet dreams.’ His database automatically informed him. And well, Genos had never been faced with Saitama like this before. If Saitama had ever been like this Genos could only speculate it had been when he was out on a job or in a Hero Association meeting. Honestly, Genos hadn’t known Saitama was capable of getting aroused anymore.

Genos had the parts to do things, sexual things that one would do with an intimate partner, and had tried to tell and show Saitama. However, every time that he tried, or tried to progress their mindless kisses into more heated make out sessions, something always came up, some excuse. Saitama always pushed him away. Due to that he came upon two conclusions: Saitama was happy the way they were, and he may have lost all sexual feeling with his other emotions.

It didn’t bug Genos. He was content with the fact that Saitama was getting enough feeling back in his once emotionless life to return Genos’ love. He had told Genos it came to him so naturally that he couldn’t do anything but love Genos; and of course he had cried when Saitama had told him. But here Saitama was now, with an erection in his sleep with Genos befuddled, frozen in place, staring at it like it was some foreign object. In a way it was, as he had seen Saitama naked more than once before – he always seemed to run into naked people – but never had he seen Saitama aroused. Even just kissing Saitama hardly got even remotely close to looking aroused, not even a little flushed. Genos was the only one who did.

So at least a previous conclusion was debunked Saitama could still get aroused; and it brought on another, maybe he wasn’t aroused with Genos. Genos was just a chunk of metal formed into a body shape…even if he did have working parts for sexual acts, how could Saitama like it? That left the conclusions being that Saitama was just happy how their relationship stood with a combination of Saitama not being attracted to Genos at all.

It hurt honestly, if Genos thought about it, but he would do anything for his sensei so if it really came down to it, he would just remove the sexual organs he had installed and ask Dr. Kuseno if there was some way to shut off the transmissions to his brain. Genos had always dreamed that his first experiences would be with Saitama, but if Saitama wasn’t into it, he’d let it be a fantasy and fade into nothingness. He would not create a rift in their relationship because of his stupid desires.

There was a torrent of feelings wailing inside of Genos and all he could do was stare at the offending appendage. He wanted to know the smell and the taste of it; to see if his inexperienced hands and lips could bring some pleasure to Saitama’s life, or at least, to his dreams.

Saitama grunted. “…no.” A pause. “…exact change…” Genos stared at Saitama – specifically his cloth-covered penis – and watched him twitch. Exact change was making him aroused? Really? Did sales really have that much power over Saitama? Well, he would not judge, but he had to do something instead of holding the cover up and getting caught! But what to do?

…

A minute later and Genos was between Saitama’s legs, heart-print cover up over his back to sit against his shoulders, his hand wrapped around Saitama’s erection, Saitama’s underwear pushed down off his hips. He was scanning and recording like no tomorrow without even meaning to. Genos made sure to monitor his heart rate, noticing how it began to beat faster but gave no signs of waking up, merely signs of arousal. It pleased Genos to know that he was pleasing him in some way, even if he was asleep. He could be dreaming of some gorgeous girl from one of his ecchi mangas for all he knew.

99.99997% that was the case. 0.00002% that it was someone he knew. 0.00001% that it was Genos. That slim percentage that maybe, just maybe, Saitama wanted him to be doing this to him spurred him onward.

He continued to stroke Saitama, watching his facial features for the next few moments. His eyebrows would twitch sometimes. His lips would open to let out a small gasp or grunt which accompanied a hip jerk. Sometimes his eyes would scrunch with what originally appeared to be pain but his scans confirmed it was in pleasure. Genos watched Saitama’s face from where he sat and then slowly down to the cock he was stroking. There was a faint sign of a happy trail going down his abdomen that lead to the thick mass of black pubic hair. It was incredible to see that his sensei did in fact have any hair, other than his eyebrows, on his body! He made a quick mental note of it before something caught his eye that was pooling at the tip, making Genos lean down to get a closer look.

One inhale and his scent receptors were filled with the deep musk that only belonged to Saitama. A little sweaty, salty–did he taste salty too? Genos hovered over his tip, swallowing hard as he looked at the pre generously spilling out of his slit. He licked his lips slowly. A small taste wouldn’t hurt. Maybe his fluids would hold some insight to his power. That’s right! He had no ulterior motive, just seeing if this held some secret to his power.

Genos just barely stuck his tongue out of his already parted lips, and ran it flat across the head, pulling up the pre-cum onto his tongue. It tasted a little bitter, most likely from all the meat and vegetables Saitama ate; his database kindly providing ‘Semen’s taste is affected by the food people ate.’ Genos didn’t mind though. It wasn’t like he would gag on his taste or if he decided to stick the whole thing into his mouth. Actually… if he did continue ministrations with his mouth in lieu of his hand it would be called a blowjob as per the results of his database flashing quick videos in the corner of his eyes. His database also provided that statistically most men preferred blowjobs rather than hand jobs.

That thinking lead Genos to push his hand down around Saitama’s base, skin catching very slightly against his joints, and opening his mouth to wrap his lips just beneath his glans. He enforced a little suction, swiping his tongue against his slit firmly which had begun to leak again. A throaty groan was heard from Saitama, hips jerking upwards without warning. The motion alone almost forced Genos to take the whole thing into his mouth on the first try. His hands quickly shot out to still Saitama’s hips, the erection halfway in his mouth. He pulled his mouth off with a gasp, looking up at Saitama to see if he had stirred at all. Sure enough, Saitama was still fast asleep, so asleep in fact a snot bubble was forming. Gross, but endearing.

Genos sighed in relief. What would Saitama say if he found Genos on his dick? Sucking him off?

…it wouldn’t stop Genos that was what.

The blonde wrapped his mouth back around Saitama, ready when Saitama’s hips twitched upwards into his mouth. Again he was forced to take more than he thought at once, momentarily his tip pushing at the back of his throat. Genos lifted his mouth so just the tip was in, sucking headily. He looked up at Saitama’s face, watching the beads of sweat beginning to form on his forehead. Was this actually some type of exertion for his boyfriend? Regardless, he pushed all his thoughts out of his head and shut off his gag reflex. He wanted to test himself, to see if he could bring Saitama to climax in his sleep. This would most likely be the only chance he ever got.

Genos’ hands splayed over his hips, and he kept a small indicator of Saitama’s vitals in the corner of his optical at all times so he could be warned if Saitama was slipping out of the depths of sleep. Slowly Genos opened his mouth as far as it would go as he took all of Saitama’s girth into his mouth. Pleasure flashed through his system straight to the panel that held back his sexual organs. His nose nestled against the expanse of black pubic hair, his chin hitting Saitama’s tightened ball sack. Saitama’s tip had easily pushed past the back of his mouth and was sliding as far as it could down his throat.

A warning of an obstruction blocking his throat popped up and he quickly wrote in an override command to bypass the warning. With that and his gag reflex turned off, he was able to continue with no incident.

Genos made sure his lips were pressed tight around Saitama’s cock as he pulled his mouth up his length, then plunged it back down towards his pelvis. Another throaty groan left Saitama and it filled Genos with dirty thoughts; at this point the lock on his plate might automatically slide away with want from the erotic display before him. Genos was turned on by what was going on, and proceeded to move his mouth, picking up some sort of rhythm that Saitama seemed most pleased with. On his upstrokes he rubbed his tongue against the veins up to his glans then over his tip to suck more of the bitter fluid before he pushed his head back down as far as he’s allowed. He does so several times.

Suddenly Saitama gripped his hair tightly with one hand, tight enough that he could feel his artificial scalp threatening to tear away. However, the needy groans kept Genos from pulling off, and instead Genos began to move his mouth again with happy pushes from the hand in his hair. Genos watched Saitama, keeping a close eye on his vitals. Saitama’s face was flushed with arousal. Genos moaned around Saitama’s length which earned a gasp from Saitama’s sleeping form.

“Fuck…” Saitama growled out, and Genos eyes widened as Saitama paused his twitchy hips. Had Saitama finally awoken? His core whirred loudly, equivalent to a pounding heart, and he waited with drool sliding out the corners of his mouth and down his arousal. The hand in his hair became two, and Saitama ran his hands through it.

Genos was taken aback and was half tempted to pull his mouth off of Saitama’s cock and run, when suddenly Saitama’s hands combed to the back of his head. They pressed down forcibly and Saitama thrusted his hips up violently. Genos gasped, and he would’ve choked had he not turned his gag reflex off. He groaned, eyes shutting. Saitama’s feet planted themselves firmly beside his waist and helped gave him momentum to thrust up into his mouth again. Momentarily he worried about Saitama getting carried away that he would harm his face and possibly his brain, but the worries were drowned out as Saitama’s breath hitched.

“Fuck… so… good!” Saitama hissed under his ragged breath. Genos moaned again in response, letting his jaw relax as much as possible to allow Saitama the capability to thrust into his mouth without the worry of him unhinging it. Thus, Saitama fucked Genos’ mouth with all he had. It would be absolutely violent for anyone but Genos, most likely a normal person’s skull would’ve been crushed with the amount of force that was happening. It was also a brutal pace that would’ve burned the lips and mouth of others.

Thank the lord he was a cyborg.

“Hnng!” Saitama’s climax was absolutely gorgeous and unexpected. And of course, Genos recorded it. Saitama’s jaw tightened to hold back his moan, eyes clutched tightly shut, forehead shining from the sweat, cock pulsing in his mouth. It was a picture of absolute bliss. Genos hungrily swallowed the thick, sticky substance. Saitama sighed blissfully and his hands flopped down beside him, and a loud snore left his lips. Genos pulled his mouth slowly off of Saitama, licking up what he had not swallowed and feeling a dull ache in his jaw joints. It had been put to the ultimate test thanks to his boyfriend’s brutal face fucking.

Genos quickly grabbed some tissues to clean Saitama up from his bodily fluids and saliva. He gingerly pulled his boxers back over him and pulled the blanket up to his chest. He discarded the tissues in the trash and felt the weight of what had just happened fully set in. He had sucked Saitama off without his permission. Genos frowned at himself. How could he do such a thing? He looked at Saitama’s peaceful sleeping face. “I got carried away…” He muttered to himself and he made his way to the kitchen. He vowed silently that he would never assault Saitama like that again – even if he found Saitama asleep with another erection that was just begging to be sucked.

He took the lashing Saitama gave him when he woke up to find himself late for the time sale happily. Though, he noted that Saitama was visibly more alert and pleased through the day even if they had missed such an important sale.

His eyes opened on their own at one AM. He looked to the side to see the blonde tufts of hair that could only belong to Genos peeking out of their shared blanket. Their two futons overlapped on the edges to allow the two to sleep together; given that they were a couple now they had agreed upon sleeping together, sometimes cuddling together or like tonight they just slept close. Genos was asleep on his back, fans providing quiet white noise which Saitama found comforting on most nights. These were the nights that Genos was deep asleep.

Saitama turned on his side and reached out, moving the blanket aside so he could see Genos, touching his face gently, mindlessly tracing his facial features. His mind wandered as his fingers went down the soft black mesh of his neck. It was so soft he could wrap himself up in the material and be happy. He pressed closer till his face was into his neck, hand on the other side, and he inhaled his scent. He smelled of oil, that weird metallic silver, and vanilla. Ah, he moved to nuzzle his nose into his hair. It must be the special shampoo he had to use exclusively for the special fibers that made up his hair. He moved back, raising himself up on his elbow and stared down at him.

Genos looked absolutely beautiful all dressed up in his heart pajamas that matched the age old blanket that was covering them. For the longest time he had gone to sleep in regular clothes until Saitama insisted "it must not be comfortable” and bought him the pair of pajamas on sale. Genos loved them and admitted they were comfier than his regular clothes. Honestly though he wouldn’t mind if Genos slept naked, it wasn’t like he had anything.

The bald hero had seen Genos naked and he had absolutely nothing down there. Nothing dangling, no hole, no nothing. Just silver plates. Maybe putting something there was outside of the doctor’s capabilities or maybe Genos didn’t want to have to deal with anything in that department. Saitama couldn’t blame him if he didn’t find his bald head attractive. Or maybe Genos wasn’t capable of sexual feelings, whether he wanted it or not. Saitama never questioned Genos about it because he assumed it couldn’t be done. And if it could be done, Genos didn’t want to get it done. Which was okay. All they ever did was make out and Saitama never pushed Genos to do more. He was perfectly fine with how things were.

However, on nights like these it was hard. Literally. These were the nights he wanted to drown in Genos.

Saitama ran a hand through Genos’ hair, pushing it back, and looked at his flawless face, wetting his lips. Lately, he had had more intense dreams of Genos with parts he didn’t have, sucking him off, pleasing him. Fuck, Saitama imagined he could get off without even touching himself if all he could do was get Genos off. He leaned in and placed a soft kiss on Genos’ softer lips, waiting to see if there was a reaction.

Nothing happened. Genos truly was deep in his sleep cycle. Which meant… “Sorry Genos,” Saitama mumbled and he moved over top of the cyborg. He slowly unbuttoned Genos’ top and pushed it aside so that it lay apart on either side of him. He pushed down the front of his pants so his erection could be released, coming to rest against the groove between his breast plates. Saitama groaned, biting his bottom lip. Fuck. The guy didn’t even have boobs, but the feeling of metal against his penis was an absolutely jarring experience. Genos had no idea how much he turned Saitama on; not to mention when he went flitting around in that cute ass apron that framed his ass beautifully.

Saitama began to thrust his hips lazily, rubbing the head of his cock against Genos. It felt so good the way the metal sometimes caught on his skin. It never hurt but did a little extra something to him that he absolutely loved. He lifted up one of Genos’ limp hands and moved it so that it laid over top of his erection and chest. He wet his dry lips, curling Genos’ hand around himself as he began to thrust into the space he created. Was this what it would feel like if Genos had something that he could fuck? To feel metal grating against his glans, feel the warmth of Genos’ thrumming core that was his heart? Saitama bit his bottom lip.

What faces would Genos make if he fucked him senseless? Would he be able to walk afterwards? Would Saitama even be able to use a molecule of his strength to send Genos to heaven? Would his voice glitch out and shudder? Would Genos gasp out in want and call Saitama’s name over and over like a chant?

His thrusts grew faster, heart pounding in his chest, sweat beading his brow. He wanted to see the pleasure fill Genos’ face, see the elusive ahegao* face struck on his face, put there by Saitama’s doing. His breath came in faster puffs, squeezing his hand so that Genos’ hand squeezed more around him. His lazy pace had picked up and he stared hard at Genos’ face as he imagined how Genos would look.

Would Saitama be able to make, the usually straight faced, Genos beg to be fucked? Would he drive Genos absolutely crazy by teasing his – nonexistent – hole, pressing against it but not entering? Would Genos thrust his hips back, butt in the air, desperate for Saitama to give him more? Would he drool and cry when Saitama finally breached him? Saitama ground his teeth together, hips jerking as he suddenly coated Genos’ hand and chest with thick spurts of cum. The man hissed softly, riding out his orgasm.

Saitama looked down at the mess he had made and sighed. Thank god he had a whole lot of practice cleaning up his own mess throughout his life, the one good thing about being a seasoned man at twenty-five. Saitama got up carefully, legs still wobbly from his recent orgasm. He hobbled around quietly, getting tissues and a special metal cleaner. He cleaned himself first, pulling his pants back up; he couldn’t change into new ones because Genos would notice first thing in the morning that something was up. Next, Saitama cleaned Genos up carefully. He made sure not even the tiniest shred of his DNA could be found on him. Then, he buttoned Genos’ shirt back up and situated it comfortably over his frame.

Saitama flopped down beside him, arm draped over his chest. He stared at Genos’ face, giving his cheek a kiss after a thoughtful moment. “I’m sorry Genos… you’d hate me if you found out I did this.” Saitama sighed, the weight of what he did resting on his heart. Genos would leave him in the dust if he found out Saitama felt like this for him, that he had done such a thing to him while he was sleeping. “I love you so much…” He cuddled closer to Genos, soaking in the warmth his body was providing to him.

On nights like these he wanted to drown himself in Genos, but all he could do was shut his eyes and cling closer to his source of heat. He could always drown himself in Genos in his dreams and fantasies.

Saitama had already gone to sleep ahead of Genos, unintentionally, while they watched a movie on an impromptu movie night. Genos turned off the TV as the movie ended and the remaining desk light before he settled down on his futon. He pulled the covers up over them and kissed Saitama’s forehead, earning a soft intangible mumble from the man.

Genos smiled and turned onto his side, his body relaxed as he prepared to enter his sleep mode. It still plagued him, the thoughts of the blow job incident that happened many weeks ago, and he was only getting over it now. He still felt overwhelming guilt for what he had done, but at least at night he could block it from his memory and have peaceful dreams.

As Genos began to load down he was aware of Saitama shifting closer to him. It wasn’t uncommon, as sometimes the man loved to cuddle as they slept. He stalled his processes as Saitama swung a leg over both of his own, locking them loosely in place, and his arms snaked around his torso. He let a small smile grace his lips and began the processes again.

Systems cut online sharply. His eyes widened as he felt hips grind back against his ass. His breath hitched for no logical reason, and Genos began to be aware of what his sleeping partner was doing. This wasn’t some cuddling session. This was a frotting session. Genos gasped as the hands on his torso pushed his shirt up, the right arm that had squirmed itself beneath Genos pushed through the gap of two buttons, broke one off, just to grope at his chest plate. The cyborg gasped as the left hand pushed the bottom of his shirt up, gently rubbing over the thick cables on his stomach.

“S-Sensei!” Genos managed to squeak out as he felt the hard arousal press adamantly between his cheeks. Despite there being two sets of clothes between them, he could very clearly feel the shape of Saitama’s cock against him. It also didn’t help he knew his measurements thanks to the blow job weeks before, his systems having computed the information and saved it in a hidden blocked file. Saitama grumbled in his sleep and rested his face up on top of Genos’ neck. His eyes glanced back to see his boyfriend’s sleeping face. A quick scan ensured that Saitama was still very much asleep, and very much aroused.

“Ah!” He gasped, his hand snapped up to cover his mouth. Saitama’s left hand had quickly dipped and pushed his pants down his thighs. Genos began to squirm. “S-Saitama-sensei… please,” His breath hitched as Saitama’s fingers grazed over his chastity plate. “Stop,” He barely got the word out as Saitama’s brows furrowed and his grip tightened. His left leg hooked onto his own left leg and held it back, his right leg resting over top of his right so that he couldn’t move his legs. His right arm moved over his torso to firmly sit there so he could rub over his chest plates.

Genos couldn’t hold back his moan as Saitama’s left hand deftly moved his fingers over his plate in a circular motion. The way Saitama was touching him made Genos hold back his sounds of pleasure. It was like a dream come true. As he debated if he was really awake or if he was having an intense dream, he hardly noticed when his panel gave way to reveal his sexual organs.

Behind the panel laid two sexual organs. They were made of the same sensitive, black mesh material on his neck. He had a penis, just like any male would, but not far beneath laid soft folds that made up the vagina he also had. Both were already dripping from the stimulation the rest of his body had received.

Genos essentially squealed as his curious hand immediately assaulted him, stroking his arousal first. Saitama ground his arousal against him readily. “Sensei…” Genos gasped, overwhelmed with the way it felt to have someone else touch him intimately, and that someone else was his sensei. Then, on a down stroke, Saitama’s fingers wrapped around his base, and his pinky felt what was further down.

“Hm…” Came from Saitama’s lips and he shifted closer, grip tightening on Genos. Genos let out a whimper and then another moan into the palm of his hand as Saitama’s hand completely shifted down to his cunt. He shut his eyes at the intense pleasure that seared through him as Saitama’s fingers pushed between his folds, feeling at the wetness that greeted him. A groan could be heard and Genos swore the arousal against his butt pulsed in want.

“Sensei,” Genos let out weakly and then whined as a teasing middle finger probed at the tight hole hidden there. Saitama’s hands seemed to massage the tension out of him, getting him to relax, then he slipped his middle finger inside. Both parties groaned, Genos moaned from the feeling of something entering while Saitama was enjoying the feel of wet heat surrounding his digit.

Saitama began to move his finger almost immediately, pushing it in as far as it could go before pulling it out and pushing it back in again. Saitama got a rhythm going, face pressed into Genos’ soft neck. Genos gasped, panting into his hand. He had to wake Saitama up, but at the same time he couldn’t help but feel overjoyed that Saitama was touching him. There was also so much pleasure wracking through his body.

Genos slowly pulled his hand away from his face and his body chose at that moment to let out a loud moan. “Saitama,” He bit his lip to try and keep any future noises down.

Saitama slowly stirred, eyes opening and groan leaving his lips. Did he just hear Genos utter his name in an erotic voice? His motions stilled as he opened his eyes to find himself hard and pressed against Genos. He groaned softly. Ah, he must have clung onto him in his wonderful fantasy and – Saitama’s thoughts stalled immediately, going blank, eyes looking down over Genos’ shoulder.

His right hand was on Genos’ chest, holding him back against his own chest. And his left hand – holy shit there was a black dick – was two fingers deep in what he could assume was Genos’ vagina.

What.

. . .

Fuck.

Saitama slowly moved his head to stare blankly at Genos’ completely flustered face. Genos’ bright eyes slowly moved, plush lips panting against the back of his hand, hair already in the process of tousling. Their eyes met and Saitama could feel the deep flush blossom on his cheeks all the way to his ears. “Uh…” Saitama had no clue what to say. He was two fingers deep in his boyfriend.

“Sensei…” Genos let out in a whimper that went straight to Saitama’s erection. “I’m sorry,” His voice was shaking and Saitama could tell he was about to cry. “I couldn’t… stop you.” Saitama swallowed hard and slowly pulled his hand out, having to physically stop a shudder from racking through his body as he felt Genos’ weird insides trying to pull him back in. His fingers popped out with a wet sound and Genos shuddered. Saitama had to rest his forehead on the back of his neck, breathing hard and feeling the blush all the way down his chest.

“Fuck Genos…” Saitama swallowed hard and he peaked at him over his shoulder. “You have a dick… you have a hole!” His voice came out raspy with excitement that he was trying to hold in. He could feel Genos’ dick jolt against his left hand at his voice.

“Y-Yes sensei, I do…” Genos tried to even his breathing and will his arousal away. His sensei must be disgusted with him. He jolted as Saitama ran a hand over his cock in wonder and moaned. “Sensei!”

“Don’t call me sensei at a time like this.” Saitama let out in an exasperated voice, hand stroking Genos a few times before it smoothly slid back to feel at his wet folds. “Oh fuck,” Saitama leaked against his pants just from the touch. How would it feel if he pushed inside? “I thought you didn’t have anything.”

“I-I do sen—Saitama, it’s hidden beneath a protective plate.” Genos managed to get out and he gasped again, shivering at the press of Saitama’s finger tips, teasing his entrance. “I,” His voice shook. “I thought you didn’t find me attractive…or didn’t want to do anything.” Saitama paused again then laughed, pressing his forehead against Genos’ cheek. Genos stared at him, waiting with bated breath.

“We’ve been thinking the same thing… man,” Saitama raised his head to stare at Genos. “We’re so fucking stupid.” His right hand moved to cup Genos’ cheek and slowly shifted over him in the slightest, lifting his face so he could press his lips to his softly. Genos’ eyes went wide, shocked beyond belief, but he slowly melted into the kiss. His eyes shut and he leaned into Saitama’s lips, happy. However, he suddenly gasped into the kiss – providing the perfect opportunity for Saitama to delve his tongue inside – as Saitama’s fingers rubbed circles over the pert clit hidden in his folds. Genos poured moans into the kiss as it deepened, Saitama hungrily eating up his sounds.

Finally, their lips parted and Genos looked breathlessly up at Saitama who was red and starved. His features were sharp, not at all like the soft egg look he typically sported. Saitama looked aroused. Genos could cum, though he was certainly already sporting some waterworks through his eyes instead, oil drying on his cheeks. “Saitama…”

“May I…?” Saitama pressed a prying finger to the twitching entrance that was just begging to have him back in. How he managed to get the question out between a growl was an absolute mystery to him. Genos swallowed hard, core whirring even louder in his chest, body beginning to light up visibly from the pleasure.

“Yes… you may.” His lover immediately pressed two fingers into Genos, seeing as he woke up that way he ought to be able to take that much now, right? Genos moaned, hips jerking to press Saitama’s fingers deeper. “Saitama~” The way his name was spoken by Genos went straight to his dick. Saitama’s mouth got to work lightly nipping and sucking at Genos’ sensitive neck, toying with the white cables, all the while his fingers worked nonstop to bring pleasure to his boyfriend.

“I can’t believe, you have something.” Saitama gasped out against his neck, grinding his hips forward into Genos. “I should’ve just asked… I’m an idiot.” He admitted, feeling quite talkative despite the situation. Genos just let him talk. “I-I’ve done something bad while you slept… I kept grinding against you… I even got you dirty.” His ears burned hotly at his admission.

“Sensei, you could never do something bad to me,” Genos managed to get out through his gasps and moans. By now he was moving his hips happily to both his fingers and the dick grinding unrelentingly against him. “You are always welcome to use me as you please… even if I am in sleep mode.” Genos voice hitched as Saitama pushed in a third finger to stretch him well.

“I’ll wake you up from now on.” He licked the outer shell of the blonde’s ear, nipping near his earring.

“Saitama… I’ve also done something bad.”

“You? Impossible.”

“I… took advantage of you in your resting state. You were aroused when I tried to wake you a-and I,” Saitama pushed his fingers deeper; Genos shut his eyes.

“Yeah?” Saitama was breathless.

“Put you in my mouth.” Saitama’s hips jerked against him and groaned into Genos’ ear. Genos moaned in turn, shaking at the way his fingers pushed as deep as they could go and rubbed his thumb against his clit.

“Fuck… Was that the time sale day when you let me sleep in?”

“Yeah,” Genos barely managed to get out.

“That’s hot, damn, I can’t be mad at you Genos.” Saitama pushed at Genos’ face so he could kiss him hard. Their tongues pressed together and he drank in the sounds his cyborg made in pleasure. “I could never be mad at you.” He breathed out against his lips, looking into his eyes. Genos’ eyes had fully blown up to near complete black. “Hey,”

“Hey…” Genos copied quietly.

“Can I… can we…” Saitama struggled to get his words out in one piece, and pulled his fingers out slowly as half a means to concentrate. “Do you want to have sex?” Genos looked at Saitama with wide eyes and his core stalled momentarily in shock.

“Se – Sen – Saitama,” Genos sat up slightly, turning to face the bald man more. Saitama took the opportunity to take an appreciative look over his lover’s form. Those pretty lips were just pleading for Saitama to take them, dripping in juices. He wondered if it would taste like anything. “You want to have sex with me?” Saitama laughed at Genos’ surprised question, leaning forward to butt their foreheads together lovingly.

“Yeah, I’d really love to.” Saitama smiled sheepishly at Genos. Genos smiled back and then leaned forward to kiss Saitama softly. The kiss slowly deepened with Genos pushing his tongue against his lips slowly. Saitama willingly opened his mouth and groaned as Genos mapped out the inside of his mouth with his tongue. “Is that a yes?” He breathed out, hand caressing his cheeks.

“Yes, Saitama.” Genos laughed softly before he kissed Saitama again. Things got heated again pretty quickly from there. Genos moved to lay on his back and Saitama hovered over him. Genos doused Saitama in kisses as he got comfortable between his legs and he spread them a little wider after shrugging off both of their pants. Saitama laughed as he tried to pull from the kisses to get his shirt out of the way, Genos’ shirt easily pushed off his shoulders.

“So eager,” Saitama’s voice held a teasing tone.

“I’ve been wanting this for a while Saitama.” Genos admitted with a serious expression.

“Me too Genos.” Saitama smiled to him. Genos laid back on his pillow and Saitama rubbed his erection all over Genos, letting it soak up some of his juices for lubrication. “Ah,” Saitama paused before he could get the chance to do anything. “Do I need a condom or anything?” He looked at Genos with concern. He did only just learn that Genos had the means to have sex so he had no clue about any details, yet.

“I cannot contract anything sensei, so even if you would have some STD it would be okay without one.” Genos informed Saitama, much to his relief. “And it is fine if you…inside…” The blonde’s face was alight with embarrassment, eyes averted to the side. Saitama swore his face turned five shades darker.

“Okay,” Saitama let out dryly, eyes wide. Saitama slowly moved his thighs beneath Genos’, he made sure Genos was comfortable before he began to press the head of his dick to Genos. “Smack me or uh, something, if it hurts or need to take a break or something.” As much as Saitama just wanted to slam into him and bring them both to a beautiful completion, this was their shared first time together.

“I’ll be fine, Saitama.” Genos smiled, and moved his hand to rest overtop the hand on his black, mesh covered hip joint. Saitama pushed inside as slowly as he could, which was extremely difficult with the way Genos’ complex insides wanted to pull him in all the way right off the bat. He focused on watching Genos’ face as it strained and fought to let out his sounds. When Saitama was quite literally balls deep inside of him, he leaned down to kiss Genos’ bitten lip.

“Come on babe… open up for me.” Saitama cooed softly, nuzzling the side of his face. “I want to hear you moan. You’re so wet, so tight around me.” He whispered as sweet as he could to get Genos to free his lip. A breathless moan left the blonde, eyes trained on Saitama’s already sweating face. “That’s it.” He rewarded him with a soft kiss.

“Saitama,” His core was loud in his chest. “Please move,”

“Hm?” Saitama raised an eyebrow, confused.

“Y-Your hips.” Genos stuttered despite nothing being wrong with his voice modulator. “Y-you can mo-move your hips.” Saitama smiled, adjusting his hands to grip onto Genos’ hips better.

“With pleasure.” He slowly drew out of Genos till just his tip was in, then pushed all the way in. They groaned in unison. “Fuck, you feel amazing Genos.” Saitama groaned, thrusting his hips again with a little more rigor. After I few thrusts he grew daring. “Can I… try a little harder?” Genos looked up at him in surprise, one hand gripping the futon that lay beneath him.

“Yes… please.” Oh god, would it be just like when Saitama face fucked him in his sleep? If it was anything like that he’d be coming without his erection ever being touched! Saitama grinned widely, seeming excited that he could go a little more out. So, Saitama did. The rough thrusting began and to Genos it was exactly like Saitama had done to fuck his mouth. Saitama’s hands gripped his hips hard, his hips setting a brutal pace.

Any regular human would be crying out in pain from the pressure his hands placed on hip bones and the relentless, harsh thrust of his hips; the skin to skin ( in this case metal ) would’ve turned red with one slap and felt raw like a rug burn – but Genos had his head tilted back into his pillow in pleasure, constant moans spilling out of his voice.

This was what Saitama dreamed of.

Of course, Saitama still reigned in his power so he didn’t break his boyfriend. That would be an awkward talk with the doctor about why Genos’ lower half was blown to smithereens. It would also be a terrible first time! Saitama didn’t want Genos to deal with anything unpleasant the first time around. After all, they had so many kinks and weaknesses to find about each other and exploit.

Genos couldn’t believe the pleasure he was receiving, but leave it to his sensei to teach him anything. The feelings that coursed through his body was unlike anything he had ever experienced, and as a result he could not keep his voice down. The glitches began to take shape. His pitch jumped an octave. His fingers clawed through his futon on accident but what was he to do? His other hand still gripped desperately onto Saitama’s, to keep himself grounded, so he knew he hadn’t died from such a pleasurable experience.

“Saitama! Ah! Please! More!” Genos begged for more. Saitama complied, completely mesmerized by the way pleasure looked on Genos. He wanted to be sure he gave him that look many times. There were no calculative looks, just lust and love and feelings. Saitama watched Genos’ eyes roll back as he shut them and his heart pounded in his chest at the sight. Was he going to–? Saitama’s thrusts got rougher and lifted Genos’ hips higher so he could press deeper into him.

“Genos…” He groaned. “I’m close…” Saitama began to try different angles with his hips. He wanted to bring Genos to completion before his own, so he also took up to stroking Genos with the hand that wasn’t beneath Genos’ hand.

“Saitama!” Genos suddenly cried out, oily tears bursting from his eyes. Saitama stilled for only a fraction of a second.

“There, huh?” Saitama grinned, face darkening into something predatorily, and with renewed vigor began to keep his angle to thrust into, what he could only guess, as Genos’ sweet spot. Of course, he would be working to map out the inner workings with his tongue later on. Genos clawed at his hand and he grinned, comforting him by rubbing his thumb over the soft mesh. His cyborg’s mouth opened, the sounds emitting from it absolutely mind boggling.

Saitama could feel his balls tighten, climax imminent. He picked up the pace of his hips and hand. Genos was going to cum first. And he did. Genos’ head slammed back – thank god the pillow provided some cushion at least – and his voice went into wild computer noises like it was going to shut down, then to numbers, and finally it just went silent. Drool slid out the corner of his mouth and down the side of his cheek. Saitama watched as cum rushed out of Genos’ penis, though it was his own version of cum – just thank god it wasn’t oil, to soil his stomach all the way up to his chest.

Saitama could feel the death grip around his cock and he didn’t even get a full thrust back into Genos’ wonderful body before he climaxed. “Genos!” His body shook, legs trembling. Genos’ body milked Saitama for all he was worth and all he could do was grind his teeth and pant. They both gasped and Saitama leaned down, resting his forehead against Genos’ forehead. His hand turned from Genos’ hip to grip his hand, squeezing it gently. Genos finally opened his eyes to look at Saitama with bright golden eyes.

“Saitama…” Genos barely managed to get out with a smile. He sounded absolutely destroyed and Saitama was proud that it was because of him. Plus… he got to see Genos make an ahegao face, something he never thought he’d see outside of mangas.

“Genos,” Saitama spoke softly, squeezing his hand, and then he leaned down to kiss his lips softly. “I love you so much Genos… you know that right?”

“Yes I do… I love you too Saitama.” Genos lifted a rather shaky hand to Saitama’s cheek, brushing his thumb across it. “Thank you Saitama…for having sex with me.” Saitama laughed a little in response. It was so like Genos to thank someone for sex.

“Genos, I’ll have sex with you whenever you want.” Saitama pecked his lips again. “I’m glad we worked out our communication issue though… we’ll have plenty of time to talk about it later.” Saitama moved so he was resting his head against his shoulder, sighing softly at the heated metal against his hot skin. He could hear the sizzling of his sweat being evaporated upon contact.

“Yes,” He could hear the smile in Genos’ voice. They squeezed each other’s hands again and Genos moved his other hand to slowly stroke over Saitama’s head. It felt pretty nice.

“Crazy enough… I could take a nap like this. Can I take a nap like this, Genos?” It was Genos’ turn to laugh softly.

“Yes, I don’t mind.” Genos even wrapped his legs loosely around him.

“Thanks.” Saitama yawned, shutting his eyes. Man. Sleep could be a good thing sometimes.