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Rough growls faded into shy whimpers. Genos could feel warm fingers pushing through his hair, his eyes opening to peer up at his Sensei. When their eyes met, an involuntary buck pushed Saitama’s cock further down his throat and Genos only groaned, pulling back with a wet pop and licking his lips clean of saliva and pre. The cyborg tilted his head, watching Saitama move a forearm over his face to cover a prominent blush, his body arched and hips twitching slightly below Genos’ hold.
The cyborg hummed, a sly smile spreading over his lips and a delighted purr whirring in his core. He moved back down, trailing feather light kisses down Saitama’s cock and nuzzling his thigh while lapping the man’s throbbing balls, bringing one hand down to keep his thighs apart while stroking his shaft leisurely with the other. The sounds above him were mesmerizing. The biolights upon his armor glowed brighter the sweeter each whine and higher each moan of his name.
Reluctantly Genos pulled away all together, nestling up against Saitama’s chest and nudging himself below his forearm. “Sensei, let me see your face,” he purred, nuzzling him insistently and purposefully rolling his hips into Saitama’s, biting his lip and sighing longingly in response to the man’s quivering moan. The cyborg wrapped his hands around Saitama’s wrists, pulling them away from his face and guiding them over his head, watching the other pant quietly and push the side of his face into the pillows to cover himself further.
Genos smiled affectionately and closed his eyes, moving down and peppering kisses along his Sensei’s arched neck, nuzzling his nose to his nape to breathe in the scent of sweat and something purely Saitama. He trailed his tongue along his clavicle, biting the supple muscle of his chest lightly and traveling back up to suckle at the cords of his neck. “G-Genos…” Said cyborg hummed lazily in response, moving up and nuzzling his forehead to Saitama’s. When he opened his own eyes, he was slightly startled by the rarest of expressions within those dark chocolate brown eyes.
Submission.
A shudder ran up Genos’ spine, a flare of heat sending a puff of steam from his vents. Those eyes showed him what he wanted, nervously flicking downward before quickly avoiding Genos’ own red irises in shy embarrassment. Genos purred soothingly, pressing a kiss to Saitama’s temple and loosening his hold from around his wrists before sliding away from him. He relished in the disappointed whimper he heard, fumbling in the closet for a box and coming back to his Sensei’s warmth with a bottle of lube.
Saitama pulled him down for a warm kiss when he was close enough; all trust and consent that could have made the cyborg melt were he not so hard. He looked into those eyes once more before slipping down to his knees between the man’s legs. Genos licked his lips, nuzzling his cheek to Saitama’s thigh while pouring an ample amount of lubricant into his hands, warming the cool liquid within his palm before moving his fingers close, circling the taut ring of muscle in slow, soothing motions when Saitama tensed above him. Genos pressed kisses down his thigh, suckling and lapping indulgently at the man’s balls before moving up to bring his cock back into his mouth.
Saitama visibly relaxed below him, a muffled moan reaching Genos ears. The boy hummed around him, taking the chance to slip one well lubricated finger into him and groaning when his Sensei’s hips bucked again and a strangled cry fell from his tongue. “Genos, please…” Genos whimpered quietly, stroking clenching walls before adding another into him. Saitama panted roughly above him, his fist pushed against his mouth and teeth gnawing lightly at his knuckles.
Genos smiled as he pulled off his cock, lapping up the shaft and sucking tenderly at the crown, tongue rubbing the sensitive slit, sending the man wild. Another finger and gentle thrusts and Saitama was putty in his hands, the tips of his fingers just grazing the man’s prostate. His hips wriggled in Genos’ hold, riding the movements of his fingers. Genos groaned approvingly, leaning up to nudge Saitama’s jaw and stealing another kiss from him, the soft sounds he made set to record. “G-Genos, oh gods…” Saitama whimpered against his lips, looking into his eyes pleadingly and nuzzling him insistently.
“F-Fuck… Gods, Genos fuck me…”
His just barely growling, demanding voice sent Genos’ systems near overheated and he released a low growl of his own. The cyborg gently pulled his fingers from him, groaning as he finally unlocked his panels, his cock pulsing and entrance drenched, using the lubricant to coat himself before pressing the head just against him. “Please, please, please…” Saitama shut his eyes, his arms coming to wrap around Genos’ neck. Genos moaned achingly, securing his hands at Saitama’s sides and pushing himself fully into him, near shorting out at the wet whine against his ear.
Saitama nestled his face against his neck, his breaths panting and cheeks scorching and Genos could feel every single piece of him, sensors overwhelmed with nothing but Saitama. The boy began moving his hips, thrusts slow, but punctuating each with a precise stroke to the man’s prostate. “Haah, Sensei you’re good, you’re so, so good…” he mumbled, trailing kisses over Saitama’s ear and below his jaw. Genos smiled dazedly, watching the bright flush reach Saitama’s ears and he suckled lightly at the tip. He pulled his hips back; easing himself back in, repeating the motion until he had Saitama arching his back and pulling Genos back with strong legs around the cyborg’s waist.
“Mmmph, Saitama Sensei, you’re so needy… So needy for my cock, Sensei~” he purred, deepening his voice slightly and seating himself deep, giving his hips a roll to rub his prostate thoroughly. Saitama whimpered softly, his face still hidden against Genos’ nape. Genos could feel the quivering of his thighs from around his waist, moving his hands up to gently stroke them. “Hmm, and look at you…” Genos licked his lips, moving his fingers up to trace Saitama’s throbbing length. He grasped the base firmly, delivering leisure, teasing pumps, making the bald man moan and arch once more.
Genos couldn’t find the sense to mind the slight dents from Saitama’s fingers along his shoulders.
His lazy thrusts quickened, driving his cock in and out of his Sensei, deliberate strokes pushing his tip to the man’s prostate, each making him cry out. Genos moaned roughly when he finally got a perfect view of Saitama’s face, the man pushing their foreheads together. “Sensei-” the boy growled, easing them both back against the futon and finding it utterly alluring as Saitama spread himself for him, his hands above his head, clutching the pillows and thighs weakly relaxed around his waist, allowing for more rough thrusts that sent them both mad.
“Genos!”
Saitama cried out suddenly, clenching tight around Genos’ cock and drenching both their abdomens in hot cum, writhing and arching below the boy. Genos gasped sharply, the mere sight of his Sensei sending him over the edge, settling himself deep and coming hard within that overwhelming heat. Steam pushed desperately from his vents, the metal of his body hot enough to burn any other human. He panted weakly, groaning contently when Saitama moved his arms back around him, clutching him so close. Genos nuzzled Saitama’s forehead, purring and sated and utterly content. The man’s eyes were still closed, but a warm smile etched itself onto his lips and Genos bit his bottom lip to stifle an affectionate chuckle.
“You came inside…”