if you're Trinity for the love of chinchin dont read this trust me imbeggingyou

s i n

A/N: im so sorry if the characterization is really off it's 3 am and i also havent watched the show im just writing this 1. for one of my closest friends who loves saigenos and udon 2. someone requested smut so yeah apologizes!!!!
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"Sensei, what have you called me in here for?" Genos asked the bald superhero as she stepped into his bedroom.
The windowlight flooded into the room, making the pastel bluish-white walls glimmer, but that was cut off by Saitama closing the curtains. He didn't say anything, he just gestured for Genos to sit on the queen-size bed. Genos didn't want to get any thoughts on where this was going.
He sat on the bed and patiently stared as Saitama left the room for a few minutes. Had Genos done something wrong? He couldn't remember anything he done that would upset Saitama. Maybe it was good? Maybe-

"Hey, Genos," Saitama greeted, carrying a large bowl of.. food?
The superhero set down the bowl on a vanity, and shut the door. The robot was just simply confused. Were the going to share a meal? There wasn't any other reason to bring udon. But why close the curtains and door? Maybe he wanted to share something private?

"Genos."

The cyborg looked up. Saitama was sitting on the edge of the bed close to him, a mischevious grin on his face.

"I was wondering, if I could have your consent to.. try out some things?" he asked, carefully running his forefinger around the rim of the bowl. Genos barely thought it over.

"Of course, sensei. What do you need me to do?"

"Just relax."

Genos was slightly confused as Saitama placed the bowl on the nightstand and pinned Genos to the bed. (A/N: im getting really awkward writing this fuck) He tenderly took the skin around his neck and kissed and sucked and bit, provoking different pleased sounds from the male below him.
He nipped around his collarbone, and felt Genos buck his metal hips, a needy moan escaping his lips.
Saitama smirked slightly, making sure to tease the spot. Genos let out an involuntary angry whine, reaching down and fiddling with the man's junk. Saitama half-moaned, half-hissed at the contact, locking his mouth on the cyborg's.
Poor little Genos couldn't last much longer. He needed it bad. He reached down and fiddled with the metal, and a slot opened for his prize (i dont know if i'll get my fic deleted for the other word hA) to rise out. He felt Saitama's hard-on, and grinded his hips against the hero's.
Saitama grunted and broke away from Genos, snaking down to the end of the bed, and began rubbing his hand against the risen prize. Genos let out pathetic moans and cries of pleasure and ectsy, before he gave one massive shudder and came all over Saitama.
He brought a finger to his mouth and downed all the liquid hungrily. He felt he'd warmed Genos up enough to begin the real reason he'd called him in here in the first place. (btw saitama is in his boxers i didnt mention that before sry)
"Get on your back," he demanded breathily. The cyborg nodded. He felt his circuits were going to combust right then and there. His cheeks were flushed a dark pink, while his blond hair was matted and sweaty, but he was in so much bliss he didn't care. Saitama carefully picked up the still hot bowl with sweaty palms and placed it on the bed.
"Are you ready?" he asked, not wanting to start without consent.
"Hell yes, sensei," Genos gasped out.
With that, Saitama began to dip two fingers in the bowl, and test Genos' entrance. The metallic male gasped. It took a second for him to get adjusted, but when he did, Saitama stopped. He reached into the bowl, grabbed a fingertip-full of noodles, and weased them into his entrance. Genos let out a cry and gripped the pillow at the foreign feeling. Pain and pleasure shot through him immediately. For sensei. For sensei. For sensei. He thought, burying his hot face into the soft pillow. Saitama continued, the moans of pleasure keeping him sure Genos gave consent. He let the food slip down, letting Genos become used to the sensation. Saitama perched over him, kissing and biting his neck, leaving sloppy marks all over him. After some time of this, Saitama crawled back down and slapped Genos' ass, before gently gripping the noodles and pulling them back out slowly. Genos arched his back, letting out a muffled cry as he felt a twitch. Broth wasn't going to be the only liquid in that bowl. Saitama teased Genos, pushing him to his limits with the last noodle. He'd pull, stop, wait, pull a bit more, stop, a bit less, stop, and so on. Genos let out a delighted huff and flopped onto the bed, face buried into his pillow, letting his breathing get back to normal and for his body temperature to go down.
"Thanks for the time, Genos," Saitama grinned cheekily. "I'll be right back. I'm going to throw out these noodles." He said, planting a kiss on Genos' cheek. He grunted in response, curling up into the soft fabric. He barely heard Saitama shut the door and climb into the bed.

That was one hell of a lesson.

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thAt was mildly awkward to write bUt it's done!! yw jada ;)