Posted originally on the Archive_of_Our_Own at https://archiveofourown.org/
works/5975047.
  Rating:
      Explicit
  Archive Warning:
      Underage
  Category:
      M/M
  Fandom:
      ワンパンマン_|_One-Punch_Man
  Relationship:
      Genos/Saitama_(One-Punch_Man)
  Character:
      Saitama_(One-Punch_Man), Genos_(One-Punch_Man)
  Additional Tags:
      Alternate_Universe_-_High_School, High_School, Senior_Saitama, Senpai
      Saitama, Sophomore_Genos, Senpai-Kouhai_Relationship, Alternate_Universe,
      Genosai, saigenos, Express_Shipping_Services, Insert_young_and_energetic
      Saitama_here, Insert_curious_and_infatuated_Genos_here, Blow_Jobs, Semi-
      Public_Sex, Hand_Jobs, Short_Story
  Stats:
      Published: 2016-02-14 Chapters: 2/2 Words: 5721
****** Damn, I Don't Understand ******
by snowkind
Summary
     There's your senpai, and then there's your senpai.
Notes
     This short fanfiction was inspired by these multiple lovely posts (x,
     x, x, x, x)
     Pictures will appear in the story if you don't want to click the
     links. Please do NOT repost art!
     It's a fairly short story and contains anime clichés. This story is
     basically a shoujo. It's so ridiculous I can't tell if I want to roll
     on the floor because Genosai is so darn cute or cry because it's so
     ridiculous. (●´⌓`●)
     Also, I altered their ages a bit so rather than being 6 years apart,
     Saitama (18) and Genos (16) are 2 years apart.
     I hope you enjoy reading just as much as I enjoyed writing!
     Love,
     May ( ˘ ³ ˘ )♥
     P.S. The story is most likely embellished with various spelling
     errors and grammar issues... I tend to overlook a few things while
     writing and even re-reading! If you happen to spot any problems,
     please let me know so I may fix it! Thank you!
***** Chapter 1 *****
Brrrriiinnngggg Brrrriiinnngggg Brrrriiinnngggg Brrrriiinnng-
The shrill ringing of the alarm clock was promptly quieted by a sudden fist
that snapped out from under the blanket covers. The clenched fist quickly
relaxed when the ringing stopped, and then fell to the side of the bed. The
owner made no implication of getting up and instead drifted back into quiet,
dreamless slumber
                                    ~~~   
      "AH CRAP! I'M LATE!" 
Saitama bolted up from his bed when the bright rays of sunshine peeked in
through his window's curtain and gently shook him awake. He gave his clock a
quick glance, irritated to see that it had somehow ended up broken again, and
then waddled into his bathroom with his pajama pants already pooling around his
ankles and his t-shirt halfway off his body.
7:47:32 AM He came rushing back out clad in nothing save for a pair of blue-
striped boxers and a toothbrush haphazardly hanging out of this mouth with a
dribble of white, minty foam running down his chin
7:47:55 AMHe returned to the bathroom with his uniform tossed over his shoulder
and his hand now furiously working on properly brushing his teeth. 
7:48:03 AM Crap crap crap, at this rate I'm really going to be late. And on the
first day?
7:48:36 AM He hopped out of his room altogether with his uniform shirt half
buttoned and his pants in the process of being pulled up.
7:49:00 AM UAAAAAAAAAAAAAAAAAAAAAAGHHHHHHHHHHHHH
7:51:07 AM He left his apartment with a bottle of water in hand and a piece of
toast in mouth. 
7:53:26 AM He returned to his apartment and darted upstairs, snatching the bag
he had forgotten.
7:54:13 AM He left his apartment with a bag slung around one shoulder, a bottle
of water in hand, and a piece of toast still in mouth.
7:57:45 AM Aw, what a cute cat! Here kitty kitty!
7:57:46 AM He yelled when the cat scratched his face.
7:58:22 AM He returned to sprinting down the sidewalk with a bag slung around
one shoulder, a bottle of water in hand, a piece of toast still in mouth, and
blood running down his cheek. 
8:00:11 AM He skidded to a stop while passing the park, tore his bread into
several pieces, and tossed them out for the birds before continuing on his
way. 
8:06:54 AM Thank God I live so close.
8:08:37 AM He sprinted into the school building and rounded the corner leading
to his classroom door. 
8:08:53 AM He ran into another student and lost his balance. Shit. 
8:09:03 AM He quickly picked himself up and briskly walked a couple of more
steps towards his classroom door, leaving the boy on the ground. He didn't have
time to apologize!
8:09:21 AM Shit. 
8:09:34 AM He returned back to the boy he had run into and immediately felt
guilty when he realized that his impact with the other had caused him to obtain
an injury. Good job, Saitama. 
8:09:42 AM He dug into his bag and fished out a pack of tissues. He bent down
and applied the tissue to the minor scrape he had given the boy. 
8:09:46 AM The boy thanked him with intense enthusiasm and flashed with a wide
grin. 
8:09:50 AM He helped the younger student up to his feet and then gave him a
word of caution when it came to rounding corners. The male nodded eagerly and
thanked him again. 
8:09:54 AM He left the boy and bolted into his classroom.
8:10:00 AM Brrrriiinnngggg!
Saitama sighed in relief and plopped on the remaining empty seat positioned
next the window near the back of the room. He propped his head up with his hand
and then proceeded to stare out of the window. An image of the male he had run
into just seconds prior to arriving his classroom popped up into his head.
Blond. Unbearably innocent, wide eyes. Cheerful smile.
He narrowed his eyes and tried to focus on the outside world from the
window. Blond. Unbearably innocent, wide eyes. Cheerful smile.
Dammit, Saitama, get a hold of yourself. 
In the distance he could hear the muffled voice of their homeroom teacher
speaking. 
Blond. Unbearably innocent, wide eyes. Cheerful smile.
Saitama furrowed his eyebrows together and ran a hand through his short, dark
hair. He didn't even know the kid's name. Was he a new student altogether?
He couldn't recall any sort of person bustling through the high school halls...
not even during his own freshman year. If he had to guess, he would assume that
the blond was either a sophomore or junior. That cheerful smile of his
definitely ruled him out as a senior. No senior seemed to keen on graduating.
Now about those unbearably innocent, wide eyes...
After careful consideration, or rather just replaying the scene in his head a
couple of times, Saitama concluded that the younger student was a sophomore. No
junior ever possessed a pair of innocent, gleaming eyes like those he had seen
on the other. In fact... he had never seen a pair of innocent, gleaming eyes
like that kid's in anyone else. Ever. Not even himself! Except... maybe when he
was seven and still dreamed about growing up to become a superhero. But now?
Well now Saitama didn't even have the faintest clue of what he wanted to be
yet. His desire to be something he couldn't possible attain had dulled out
quickly the moment he entered high school. 
Damn, time really did fly quickly.  
Maybe if he went into law enforcement he could still bring justice without
having to wear a ridiculous getup and come up with some absurd superhero name.
Being a superhero did have a nice ring to it though; he could imagine all the
names people might call him after completing a heroic feat. 
Super Saitama. Sneaky Saitama. Smart Saitama. Strong Saitama. Stylish Saitama.
Sexy Sait-
      "-ama?" 
      "Saitama?"
      "Saitama!" 
A hushed voice repeated his name and then a light jab in the back brought him
back to reality. The male whipped around in his seat to find a familiar face
smiling at him.
Mumen. Obsessive bicyclist. Long time friend since elementary school. 
       "What's up?"
       "What's up with you? It's already lunchtime and you haven't moved an
inch." 
       "Oh." 
Saitama slipped out of his chair and together with Mumen, the two walked to
their usual lunch rendezvous spot. 
        "Ah, man! I can't believe we're already seniors." Mumen exclaimed and
stretched his arms over his head. 
Saitama nodded in response and closed his eyes as a light breeze danced along
the rooftop of the school building. Time really did fly quickly. He felt like
he hadn't accomplished much in the past eighteen years of his life. Albeit he
did have a long way ahead of him, but for some peculiar reason a sense of
emptiness and melancholy dug a rather large cavity in his chest. School was
fine. Friends were fine. Life was fine. What was he missing? Before Saitama
realized it, he slipped off into a peaceful unconsciousness. 
Blond. Unbearably innocent, wide eyes. Cheerful smile.
An image of the younger student materialized into sight. Saitama felt an odd
warmth bloom across his chest at the sight of the other. He watched with
careful concentration and felt his breath get caught in the back of his throat
when the blond male suddenly sprung forwards towards him and held him in a
tight embrace. 
What the Hell?  Hey, get off of me.
He seemed reluctant to let go. Saitama pressed his lips together into a thin
line and knit his brows together. 
What are you doing? I don't even know you.
The male also seemed reluctant to respond and instead looked up with those
innocent, wide eyes of his. Saitamas' heart jolted and his expression suddenly
softened. Without even thinking about it, he raised his arms from his side and
wrapped them around the short boy to return the hug. The comforting warmth in
his chest started to spread all around his body the longer he embraced the
other. The soothing embrace made him close his eyes. It was a sensation he
hadn't felt for a long time.  
When Saitama opened his eyes again, he saw those gleaming eyes staring back at
him. A smile began to involuntarily creep onto his lips and he stretched out
his hand to touch the other's face.
      "Uhm..." The student averted his eyes when Saitama's fingers just barely
grazed his smooth cheek.
Saitama was amazed at how realistic the dream felt. And it was so realistic
that he even felt the sudden pain when Mumen jabbed him in the side. Wait...
what was Mumen doing in his dream? 
Saitama sat up quickly, almost bumping heads with the blond, and realized that
he was back on the school rooftop. Blood rushed into his cheeks and he looked
over at Mumen, who gave him a rather skeptical look, before looking at the
blond. 
       "Wha... What's going on?" 
       "Well Genos here had something to return to you and so he asked around
and found us up here. You had fallen asleep so I decided to wake you up but for
some reason you thought it would be good to caress the kid's face?" Mumen
answered with a snicker.
        "Uhm..." The student looked back into Saitama's eyes and handed over a
bag. Saitama's bag. 
        "Where did you get this?" He asked with a tone of disbelief. 
        "This morning... when we ran into each other. You forgot your bag after
you helped me." 
        "Oh... well, hey. Thanks, Genos." That was his name, right? Or what he
guessed it was from what he had heard Mumen say.
The male's eyes seemed to brighten at the mention of his name and he smiled. 
        "And thank you again for helping this morning."
        "No problem. It was kind of my fault for running into you the first
place." 
Genos' smile widened and the two stared at each other for a brief moment of
silence until the bell rang and interrupted whatever it was they were doing.
        "Saitama, I didn't know you were into bullying other kids." Mumen joked
and stood up. 
Saitama chuckled and picked himself up as well. He paused for a second, looking
down at Genos, and then held out his hand. 
Genos' grinned at the gesture and happily took hold of Saitama's hand to help
pull him up.
        "Thanks... senpai." 
                                      ~~~
       "Hey kid, you've been following me for hours. What do you want? And stop
hiding behind the trees, it's creepy." 
          (Please do NOT repost! Art belongs to this_lovely_artist!)
Genos stiffened when Saitama addressed him. A blush instantly tinged his cheeks
and he sheepishly revealed himself from his hiding spot. 
        "Oh... it's you. Genos, right?" 
The warmth on Geno's cheeks grew warmer. He slowly nodded his head. 
        "What are you doing?" 
Genos looked down at the sidewalk before scratching the back of his head. 
        "I was just curious to see what you were doing after school." 
        "...It's been three hours since school let out." 
        "I... I am amazed by how much you exercise." 
        "Uh... thanks I guess? What are you doing though? Why are you following
me?" 
Saitama shifted the weight on his legs from one to the next as he anxiously
waited for an answer. Though it was kind of unnerving to know that Genos had
been following him for the past few hours, he felt a little good. It was kind
of like he had a fan or something. 
        "Why do you need so much training?" 
        "Huh? Oh... I don't know. I just like doing it." Saitama shrugged and
burrowed his hands even deeper into his pockets. 
        "I... uhm." 
A minute of awkward silence passed. 
        "Okay then. If that's all then you should go home now and I'm going to
go. So... see you later?"
Saitama raised an eyebrow and began to turn on his heels to face the opposite
direction. Just as he took one step forwards, a tug on his shift held him back.
He turned his head back a bit to see Genos clinging onto his shirt. The blond
was staring at the ground in quiet contemplation and looked like he had
something to say yet didn't quite want to say it. 
          (Please do NOT repost! Art belongs to this_lovely_artist!)
        "What is it now?" 
        "C...Can you help me with my homework?" 
        "Uh." 
                                      ~~~
From there on for the past three months, the two oddly fell into an ordinary
schedule. After school Saitama would exercise until around five in the evening,
and then he would meet up with Genos as either his apartment or Genos' house.
The days he went over to Genos' house were always the best though because his
mother would invite him to stay for dinner (and Saitama could give instant
ramen a rest every now and then). But every day the two met up, the warmth that
Saitama had so long yearned for began to fill the empty hole in his chest and
grow brighter every day. He couldn't help himself from actually feeling excited
to help Genos on his homework even if Genos probably could do the assignment
without his help. Being with Genos had essentially... become a lifestyle. 
       "Alright, so what's the assignment for today?" Saitama dropped his bag
near the base of Genos' bed and fell onto the soft mattress.
       "It's math." Genos replied with a grin and brought his notebook over to
the other. He took a seat on the edge of the bed and handed the notebook over
after adjusting his glasses. 
          (Please do NOT repost! Art belongs to this_lovely_artist!)
       "Oh, good. My specialty." 
Saitama turned onto his side, propped himself up with his elbow, and then took
hold of the book. He scanned over Genos' work and then quickly stole a glance
over at Genos who had now taken off his glasses to quickly clean the lenses
with the bottom of his shirt. Gawking for just a second more, Saitama looked
back down at the book. 
Damn, I don't understand anything. 
          (Please do NOT repost! Art belongs to this_lovely_artist!)
He pressed his lips together and read over the problems and checked Genos' work
several times over. He then proceeded to sit up and balance the open notebook
on his knee. 
      "Okay, well..." Saitama frowned a bit and then carded a hand through his
hair in mild frustration. 
       "I thi-" 
He was quickly cut off by the sudden feeling of Genos' lips locked with his.
Genos had leaned forwards and partially crawled into his lap. When Genos leaned
back from the kiss his cheeks had turned a bright red and he began to
unconsciously gnaw his lower lip. He sat back down fully on his heels and
timidly looked up at Saitama with those innocent, wide eyes of his staring at
him behind a pair of cute glasses that perfectly framed his face. 
      "S...Sorry, senpai. I was just curious... ah, uhm." Genos quieted himself
by taking the notebook and fumbling through the pages. He brought the tip of
his pencil to his mouth, the one he had used to kiss his senpai literally two
seconds ago, and tried his best to pretend that he was focusing.
      "Genos." Saitama muttered softly. Genos lifted his gaze up from the book,
his face still sporting a vivid shade of red. 
      "Yes, se-senpai?" 
Saitama, who was in total shock by the sudden kiss, leaned forwards again and
found Genos' lips once more. 
Damn, he really didn't understand anything. 
***** Chapter 2 *****
Chapter Notes
See the end of the chapter for notes
       "Senpai, you almost forgot your water!" 
Genos caught up with the other after running back to retrieve Saitama's
belongings. He smiled and offered the bottle to him. Saitama rubbed the back of
his neck and chuckled softly.
          (Please do NOT repost! Art belongs to this_lovely_artist!)
       "Oh, right! Thanks." He took the bottle from Genos' hand and then
quickly leaned in to press a light kiss on the boy's lips. This gesture
immediately sparked a reaction from Genos, whose face now became sprinkled with
a pale pink. 
       "Remember, I have a game today at 5. You'll be there, right?" Genos
rocked on the soles of his feet as he spoke. He felt nervous asking because he
didn't want to seem clingy, but he also truly did want his senpai to be there
for his basketball game. It wasn't like Saitama hadn't attended his previous
ones, but seeing him on the bleachers never failed to make him happier. 
       "Of course." Saitama nodded and gently flicked Genos' forehead with the
back of his palm. 
       "And relax, you're going to do great today. I'll see you in a bit." He
smiled and ruffled Genos' hair a bit before finally turning around to leave the
school campus. 
On days like these things were even more simple. Saitama would still do his
daily exercise, Genos would stay at school and warm up before his game, the two
would meet up for a short snack break, and then Saitama would cheer his head
off during the match. However, Saitama had decided to cut his exercise time by
an hour and treat Genos with a surprise visit. 
Saitama returned back to the school campus with a bag of snacks hanging in his
hand. When he popped his head into the gym, he saw Genos already dressed in his
basketball uniform. The boy was practicing his free throws, and when he made
three in a row Saitama opened his mouth to speak.
       "Hey, how about an award?" 
Genos dropped the ball in his hand and promptly jogged towards Saitama. His
forehead glistened with a light sheen of sweat and his cheeks glowed with a
slight tint of pink.
       "Senpai, what are you doing here? There's still a lot of time before
your exercise should be done!" 
Genos frowned slightly and attempted to dry the sweat by rubbing the back of
his arm against his forehead. Saitama promptly dug around his backpack a moment
and handed Genos a small towel along with a bottle of water. 
Genos lit up at the action and energetically accepted the gifts with a pleased
smile. He thanked the other and then wiped himself dry. When he opened the
bottle and brought it to his lips, Saitama moved in first and kissed him. 
Genos couldn't help but smile into the kiss. He brought his free hand to the
base of Saitama's head, the tips of his fingers barely touching the male's
black hair. Saitama, in return, cupped both of Genos' cheeks and gradually
deepened the kiss. He knew that Genos was still inexperienced, but it never
hurt to practice. Genos instantly granted full access to his mouth when he
glossed over his lower lip with the tip of this tongue. Tongue collided with
tongue and in spite of Genos' superior sense of curiosity, he remained passive
and allowed Saitama to explore his mouth and fully taste him. 
A suppressed whine escaped Genos' lips when Saitama pulled away from the kiss.
The two of them panted for air for only about three seconds before both
students brought their lips together again, this time in a more urgent manner.
Saitama intertwined his fingers into Genos' hair and lightly tugged backwards
so he could get Genos to open his mouth more. Genos let a muted groan fall from
his mouth and he accidentally let his open bottle of water fall to the floor so
he could wrap his arms around Saitama's neck. 
The water quickly pooled around Genos' sneakers while the two kissed, but he
was soon saved from the liquid when Saitama unexpectedly picked Genos up and
rushed to the back of the bleachers in the gym. He bent low and cautiously
ducked underneath the bleachers. 
       "Senpai?" Genos looked at the other with a curious expression, his face
more flushed than before and his chest rising and falling more sporadically. 
       "I'm sorry... I just." Saitama bit his words off and set Genos onto the
ground where they both took a seat. He turned his head to the side and bit on
his lower lip. 
       "Senpai?" Genos leaned over on his knees and placed his hand on
Saitama's shoulder. 
Saitama turned back, realized that Genos' current position allowed his
basketball jersey to hang and tease his eyes with the sight of bare skin, and
then pulled the younger male onto his lap altogether. 
      "Genos I." He paused again and tightened his grip around the other. 
      "Genos I re..really." Another pause and he rolled his eyes. 
Wasn't it supposed to be the kouhai confessing to the senpai? Ah, screw it. 
       "Genos, I really like you." The words came out softer than Saitama had
expected, and wasn't even sure if Genos had heard him until the male rained a
plethora of kisses along his collar bone, neck, and jaw. 
       "I really like you too." He whispered and then leaned back on the heels
of his shoes while his knees rested in the small, empty space of Saitama's
lap. 
A full grin broke out onto Saitama's face and he bent over to kiss Genos on the
lips. The kiss then moved to his cheek. Then his jaw. His neck. His collarbone.
The jersey was removed and Genos shivered a bit. He kissed the middle of his
bare chest. His stomach. The shorts and boxers were tugged down just enough to
reveal that delicious patch of curly, blond hair leading downwards to better
things. He kissed pelvic bone. Twice. Three times. Each time moving lower.
Genos trembled underneath Saitama, but his eyes retained a fervent, sparkling
look. 
       "S...Senpai..." Genos' lip quivered and his eyelids fluttered a bit. He
bit his lower lip and squirmed away from Saitama's endearing kisses. The male
looked up with a confused expression. 
       "P-Please let me..." The blond began to say, crawling back towards the
other. 
Saitama blinked and looked bewildered for a second before he nodded his head.
He stiffened a bit when Genos cupped the side of his face and pressed their
lips together. The kiss lasted for a fleeting amount of time, and then the
younger male slid his hand lower and rested his palm against Saitama's lower
abdomen. A smile ghosted Saitama's lips as he watched the half-dressed boy
intently stare down at where his hand resided. Deciding to help guide the other
just a bit, Saitama moved onto his knees. Without hesitation he tugged his
shorts and briefs down, instantly exposing his flaccid cock. His eyes flickered
up to Genos and he saw him swallowed with anticipation. When Genos looked up to
catch his eyes, Saitama nodded softly and gestured him to continue. 
Genos swallowed again and gradually lowered his head down until he could feel
the light heat emanate off of his senpai's dick and daintily flutter across his
cheeks. His curious, wide eyes looked up as if asking for further permission.
Saitama nodded one more and parted his lips just a bit. Genos began to
subconsciously mirror this action until his lips formed a circular shape. His
nostrils flared when he neared closer to Saitama's throbbing member and his
tongue stuck out. He felt Saitama flinch when he lightly dragged the tip of his
tongue down his shaft. With shaky hands he cautiously lifted the male's cock
and rested its head on his bottom lip. He softly exhaled through his mouth, his
warm breath gliding over the bare skin of Saitama's cock. When Genos could
begin to feel Saitama harden under his grasp, he looked up and saw his eyes
squeezed closed so tightly that the skin between his nose formed several
crinkles. 
       "Senpai." He breathed the word softly and could feel his heart pounding
against his chest.
       "Teach me."
Saitama barely nodded his head and focused solely on the slight pricks of
pleasure that coursed through his dick at every word that left Genos' mouth.
Keeping his eyes closed, he began to instruct the younger male. 
        "Go slowly... stick the head in your mouth and swirl your tongue
against me." 
Genos obediently did as he instructed and slowly inserted the head of Saitama's
cock past his teeth. His lips tenderly wrapped around Saitama, fully enveloping
his head in the damp warmth of his mouth. He pressed his tongue against the
highly sensitive area and quickly found himself delighted not only with the
musky taste of his senpai but also with the low-pitched noise that vibrated
through Saitama's throat. He began to whirl his tongue around the head,
evidently eliciting more purrs from Saitama. Saitama suddenly bucked forwards
when Genos unexpectedly flicked the head of his hardening cock with the
underside of his tongue. He immediately snapped opened his eyes and looked down
at Genos with a flushed face. 
        "S-Sorry." 
Genos, though taken aback by the buck, nodded his head a bit and looked at
Saitama with a reassuring look that showed he was okay.
        "Okay. C...an you take more?" Saitama let out a breathy pant and placed
his hands on the back of Genos' head.
Genos nodded again and gratefully slid in more of his senpai until his whole
mouth was filled with the male's cock. Saitama groaned and tightened his grip
on the blond's soft hair. 
        "Holy shit... your mouth is really... hot." Saitama struggled in
pushing the words out and leaned his head back when Genos swallowed, thus
tightening the empty, small space in his mouth even more. 
Saitama took another moment to somewhat compose himself before he continued to
instruct the boy. 
        "Take me out...just a bit by bit... Slowly." 
Genos consented to his senpai's wish and slide his mouth backwards at an
excruciatingly slow rate. Saitama jerked and pulled on Genos' hair. He
involuntarily cried out at the tug but promptly reassured Saitama he was okay
once his mouth was empty. After verifying that Genos was still fine in
continuing, though Saitama wasn't sure he'd be able to stop even if Genos did
deny him, he politely asked Genos to repeat what he had asked of him to do
before. Soon enough, he had Genos bobbing his mouth along his cock at a
reasonably quick pace. The two of them took no liberty in suppressing their
moans and after a few more minutes of jerking his head, Genos felt Saitama
spasm and then come into his mouth. Saitama was surprised to watch Genos
compliantly swallow everything his mouth could fit, but he was even more
surprised (and not to mention turned on) when Genos cupped his mouth under his
chin so that the creamy, hot cum that overfilled his mouth wouldn't drip onto
the floor. 
When Saitama pulled out, Genos gave the head of his cock one more kiss and then
proceeded to lick his hands clean of the cum that had trickled onto his palms.
The sight sent a jolt of pleasure into Saitama's half-hard cock (no, he wasn't
done just yet), and made him blush hard. He covered half of his face with one
hand and looked away from Genos while he licked himself clean. Dear God, who
knew this kid could make him feel this way? 
        "S-Senpai?" Genos' wavering voice made Saitama looked back at him. 
        "Could you... help me with this?" He clenched his teeth and looked down
at the tented fabric of his basketball shorts.
Saitama smiled and helped Genos out of the rest of his clothes. Before
continuing, he scrambled to find his backpack he had carelessly pushed aside
after finding a spot underneath the bleachers. He dug around the bag's contents
for a second before pulling out a medium tub size full of vaseline. Genos
immediately raised at eyebrow at the sight and laughed. 
        "Why do you have that in your bag?" 
Saitama rolled his eyes and popped the lid off. He scooped out a decent amount
of vaseline and then began to evenly apply it to his cock. Once done he stuck
two fingers back into the tub and scooped out some more.
        "Vasaline acts as a heat trap. It holds the heat I create during my
exercise so I can increase my metabolic rate. Basically it helps burn off fat.
But there are other ways to burn fat, now turn around." He instructed Genos
with a smirk. 
Genos shut his mouth, widened his eyes a bit at both the splendor of Saitama's
explanation and also his request, and then shuffled around on his knees so that
his exposed bottom was facing the other. Saitama grinned at the sight and
raised his non-vaselined hand up in the air before bringing it down onto the
left cheek. Genos whined at the slap and bent his head lower to the ground so
his ass raised higher. The grin on Saitama's softened and he grabbed hold of
the cheek he had slapped, giving the soft flesh a squeeze before sliding his
two fingers WITH vaseline between Genos' cheeks. The younger male shuddered and
rested his forehead against the ground. Just when he thought he was used to the
feeling, he gasped loudly and quickly turned his head so his cheek was flat on
the ground when Saitama thrust his cock in the space his fingers had been
originally. Saitama then grabbed both of Genos' asscheeks and spread them
apart, giving his cock more room to glide over his asshole and thrust in and
out. 
Genos moaned into the ground and closed his eyes tight when his breath began to
turn shallow. He could feel his dick harden and throb with pain when Saitama
quickened his pace. The vaseline had made the operation all the more smooth,
and Saitama could slip in and out with flowing ease. When Genos began to wet
the floor with the clear precum that effortless dripped from the tip of his
cock, Saitama pulled Genos off the ground and guided him on top of his own
dick. He helped Genos down slowly, groaning during the process at the
delectable tightness Genos' asshole provided his cock with. Genos, in turn,
squirmed and whimpered as he gradually lowered himself on top of his senpai.
However, each squirm or movement Genos made caused him to slide a fraction of a
second quicker because of how slippery Saitama's cock was from the vaseline and
how slick his own ass was. 
When Saitama was fully buried inside of Genos, he leaned his head forwards and
kissed Genos' bare back. An exhilarating energy circulated the two of them.
       "You're so good, Genos. You didn't even complain, does it hurt?" Saitama
whispered the words into Genos' ears. 
The words of praise caused a pulse to course through Genos' throbbing cock. He
only replied with a muted moan and a shake of the head. His mind began to shut
down on him and he began to see black spots popping up every now and then when
Saitama reached around him and started to pump his cock with a firm grasp.
        "Senpai... Senpai..." Genos panted and leaned his head back. 
The stimulation proved to be excessive when Saitama slid his hand downwards on
Genos' cock and then lightly bucked upwards further into his ass. He cried out
and felt tears well up in his eyes when Saitama rubbed his thumb hard against
the tip of his cock while simultaneously thrusting upwards with a considerable
amount of force. The sound of raw skin pounding against raw skin filled the
empty gym along with an accompanying schlick schlick every time Saitama slid
his wrapped hand along Genos' length.
There had been no rhythm for the first few minutes and Genos felt an incredible
amount of delightful pain with every thrust. However, when Saitama started to
think less and act more on impulse, everything fell into place and with every
push upwards into him came an equally tantalizing pump downwards on him. The
combination lasted longer than Saitama had expected. One thrust up, a groan
from Genos; one pump down, a whine from Genos. One jerk out, a whine from
Genos; one pump up, a groan from Genos. 
       "A-Ah... S... Senpai..." Genos swallowed and gaped his mouth open.
Saitama's fingers started to turn wet with the copious amount precum that was
running down Genos' shaft.
       "Sen...Senpai... Se..Aannf...mmnNNF!" Genos bit down on his lip to
muffle his cry. 
A warmer sensation filled Saitama's hand when he rammed one more time into
him and felt Genos' cock pulse, quiver, and then shoot out several streams of
thick, white cum. 
Saitama allowed Genos to finish before pulling himself out. It only took a few
pumps with his own hand to come to a climax a second time. Genos almost looked
saddened that he couldn't help him finish, but he gave the boy a reassuring,
sticky pat before pulling him into an embrace. 
       "I hope this won't affect your game." Saitama murmured into Genos' hair.
He tilted Genos' head up a bit by the chin and kissed him on his forehead. 
Genos, though dazed and completely out of it, chuckled quietly and shook his
head. He looked into Saitama's eyes with those innocent, wide eyes of his and
then locked their lips together. 
                                      ~~~
        "COME ON COME ON COME ON!!!"
Mumen stood up from his seat like the majority of the fans on the bleachers and
raised a fist in the air. Saitama watched with anticipation, his eyes following
Genos as he swiftly darted between players and made a straight beelin for the
basket. 
        "YEAAAAAAAAH!!!"
Mumen shouted in joy and the entire crowd cheered when Genos reached the basket
unscathed and earned his team two more points. There probably was no need to
cheer so excessively since their team was up by twenty points (all thanks to
Genos), but the exhilarating energy that circulated in the gym and among the
crowd was impossible to suppress. 
When the opposite team called a time out and everyone decided to take their
seats, Mumen turned to face Saitama. 
        "Man, Genos is so good! But he's been hobbling around the court every
time he runs! You don't think he's hurt, do you?" 
Saitama grinned. 
This was probably the only thing he understood. 
 
Chapter End Notes
     Thank you for sticking around and for reading this short story to the
     end! (Even though it was unbearably cheesy).
     It really means a lot to me when you leave a comment or give this
     work a kudos, but it really means a lot more to me considering the
     fact that you've even read one of my works!
     I am so grateful to have such kind supporters, and I'd just like to
     thank you all for also bearing with my potential discrepancy in
     characterization of the various characters! Thank you for sticking
     around and I hope you have a phenomenal remainder of the day! (๑ゝڡ◕๑)
     P.S. If you have any requests/would like to read about a certain
     event or AU feel free to leave a comment or message me on my Tumblr!
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