A/N: Consider this two-parts chapter as as an intermission or break before the start of the hunt for Garou.
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(1 day after the Hunt for Garou started…)
Saitama had already returned to his apartment after the day's training with Bang. His body didn't ache, not even after repeating the same motions for hours—his absurd physical strength prevented things like soreness—but his mind felt pleasantly tired. It was different from the usual emptiness he had been used to before.
Genos had stayed behind at the dojo, of course. The cyborg's eyes practically lit up whenever Bang demonstrated even the simplest stance, and he had insisted on drilling the basics until he memorized every angle.
Saitama didn't complain; in fact, that was exactly what he had hoped for. His "plan" to nudge Genos toward martial arts seemed to be working. The kid wasn't just relying on his upgrades anymore—he was actually trying to build technique and discipline.
That's a win in my book, Saitama thought as he kicked his shoes off inside his apartment.
Still, there was something else weighing on him.
Garou.
He sat down on the couch, arms crossed, eyes fixed on the ceiling. Technically, the "hunt" had already begun the moment he promised Bang. But it wasn't like Garou was someone you could just track by checking the convenience store or asking around the neighborhood. The guy was bound to surface sooner or later.
If the Association's playbook works the same in this world as it did in mine, Saitama reasoned, then Garou won't be able to resist picking fights with heroes. Once they notice the pattern, he'll be impossible to ignore. Either that or they do this stupid meeting with criminals of the underworld where he appeared the first time and he intercepts him then.
So, no need to rush blindly. Charging into the city and waving around a "Looking for Garou" sign wasn't going to help. Patience would.
In the meantime, Saitama figured he could… well, live. No massive monster crises had appeared lately, the streets were calm, and for once he had breathing room.
So…he pulled out his phone, scrolling through his contacts until he landed on Mizuki's name.
He typed quickly: Yo. You home?
The reply came within minutes.
Yeah, just finished training. Why?
A faint smile tugged at Saitama's lips. He got up, slipped his hero cape back onto the hook by the door—he wouldn't need it for this— He quickly changed into more comfortable clothes and grabbed his wallet.
Cool. Be there in a bit, he texted back and without waiting for her answer he headed out.
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"So, you and Genos trained with Silver Fang? That's so cool!!" Mizuki said excitedly as she prepared the tea, her back turned while she worked. She was wearing her usual training clothes: a tight black spandex top with a single stripe on each side and black track shorts that hugged her legs, the initials MZK stamped on the side in bold white.
Saitama sat slouched on her couch, watching her bustle around her small kitchen with practiced ease. "Yeah," he said, scratching his cheek. "I mean, it was fine… but it was a little repetitive if you ask me."
Mizuki turned, tilting her head with a raised eyebrow. "Repetitive? What do you mean?"
"He made us throw the same two punches for hours," Saitama replied flatly, raising his fist and slowly imitating the movement. "Oi-zuki, gyaku-zuki, over and over again. Felt like my arm was going to fall asleep."
Mizuki blinked, then let out a laugh. "That's training, Saitama! Of course it feels boring. But that's how you build the basics. It's like running track—you don't start by sprinting full speed every day. First, you drill your form. Again and again, until it's natural."
Saitama gave her a small side glance, lips tugging upward slightly. "You sound like Bang."
"Well, maybe Bang and I are both right," Mizuki replied with a grin, setting the kettle down as the water began to whistle. "Besides, don't you think there's value in being drilled like that? You can fight monsters with raw strength, sure, but martial arts… that's about control. About focus. If anyone could use more of that, it's you."
"Hey," Saitama said, half-defensive, half-amused. "I've got focus. I just don't see how throwing the same punch a thousand times is going to teach me something new."
Mizuki poured the tea into two cups, her expression softening a little. "It's not about new. It's about better. You don't realize it, but even a tiny adjustment—where your shoulder sits, how your hips twist—can change everything. That's why repetition matters."
She walked over and handed him a steaming cup. Their fingers brushed as he took it, and Mizuki looked away quickly, hiding a faint pink tint on her cheeks.
Saitama raised the cup in a casual "thanks" gesture before taking a sip. The warmth spread down his throat, and he let out a quiet sigh. "Hmm. Not bad. You're better at making tea than Charanko."
Mizuki giggled. "That poor kid, don't be mean. He's trying."
"I'm just saying," Saitama replied with a shrug, "his soup yesterday was okay, but your tea? Way better."
They shared a brief silence, sipping their drinks. The TV played softly in the background, though neither of them paid attention.
"So…" Mizuki leaned forward a little, resting her elbows on the table between them. "What's it like? Training under an actual martial arts master? Did Bang yell at you? Make you run laps until you dropped?"
Saitama shook his head. "Not really. He's strict, but not the drill-sergeant type. More like… calm. Observant. He doesn't waste words. It feels like even when he's just watching, he sees everything. Kind of intimidating, actually."
"That's exactly how a master should be," Mizuki said, her eyes shining with admiration. "I'd give anything to train with someone like him."
"Really?"
"Of course!" she said passionately. "Learning from the best—it's like passing down a legacy. Not everyone gets that chance, you know?" She paused, then glanced at him with a smile. "You're lucky, Saitama. Even if you think it's boring."
He chuckled softly, rubbing the back of his neck. "Yeah… I guess I am."
Her smile lingered for a second before she leaned back and stretched, letting out a small yawn. "Still, I can't picture you being all patient and repetitive. You don't exactly strike me as the 'drill the same move for hours' kind of guy."
Saitama gave her a wry grin. "What can I say? Even I can surprise you sometimes."
Mizuki's eyes softened, studying him for a moment. She opened her mouth as if to say something, then shook her head and stood up.
"I'm going for cookies," she declared suddenly, brushing her hair behind her ear with casual nonchalance.
"Okay," Saitama answered calmly, though his eyes betrayed him.
However…
As she passed by the couch, his gaze followed her, lingering on the smooth curve of her hips and the bounce of her toned ass beneath her shorts. Something in him acted before he could think twice.
SLAP!
The sharp sound echoed through the quiet apartment. Mizuki froze mid-step, her body jolting in surprise. Her cheeks flushed almost instantly as she whipped around to face him, eyes wide.
For a heartbeat, silence hung between them. Then, Mizuki's lips curled into a grin—mischievous, playful, with just the faintest edge of challenge.
"Saitama," she said in a low, teasing purr, her voice dripping with mock accusation, "you little tease."
Saitama smirked, leaning back on the couch like it was the most natural thing in the world. "What? Thought you could just walk by and expect me not to notice?"
Mizuki folded her arms, shifting her weight to one leg, exaggerating the sway of her hips. "Ohhh, I noticed you noticing. You think you can get away with that?"
"Didn't hear you complain," he shot back, eyes glinting with dry amusement.
She narrowed her gaze at him, but her blush betrayed her fluster. "That's because you caught me off guard!"
"Mm-hm," he hummed, utterly unfazed as his hands reached out to grab her hips. He pulled her towards him, his strong was grip and unyielding.
Mizuki's heart pounded in her chest as she felt herself being lifted and placed on his lap. The couch creaked beneath their combined weight, but it held steady. She straddled him, her legs on either side of his, her hands resting on his shoulders.
Their eyes met, a spark of desire igniting between them.
Saitama's hands moved to her waist, his thumbs tracing circles on her skin. Mizuki leaned in, her lips finding his in a soft, tender kiss. It deepened quickly, their tongues exploring each other's mouths.
Saitama's hands moved up to her back, pulling her closer, his body pressing against hers.
Mizuki's eyes widened as she felt the bulge in Saitama's pants, her heart pounding in her chest.
Mizuki's hands moved to his waist, her fingers hooking into the waistband of his pants and boxers. She pulled them down, freeing his cock, and it sprang up, hard and ready.
She looked down, her eyes meeting the thick, hard length of him.
However, something changed in her gaze, like going from embarrased to confidence, Saitama saw the change but he didn't understand it until…
"Saita, this time I wanna do it a little bit different, I wanna be the one to give you pleasure this time, call it revenge or call it a girlfriend spoiling his boyfriend, I don't care, just know that you will like it."
Saitama gave her a confused look. However Mizuki would rapidly clarify her sentence as she leaned down and kissed the tip of the dick's head.
A soft 'muah' escaped as her lips kissed the tip of the giant head, her tongue flicked out to taste the head of his cock. It was warm and salty, a sensation that sent a shiver of anticipation down her spine.
She lowered herself to the floor, her hands still on his waist and then looked up at Saitama, his eyes were half-lidded with desire, that made a slow smile spread across her face.
"You are delicious Saita!!" Whispered the heroine making the hero's dick wake up instantly.
Oh geez!! He is really excited. Good for me though. She thought excited as she saw the veiny and thick 12 inch lenght of his boyfriend.
She then continued to kiss the head of his cock, her tongue swirling around the sensitive tip.
"Ah shit Mizuki!" Saitama groaned, his hands gripping the couch cushions, while his knuckles turned white.
Shit! I swear she keeps getting better at this. Thought Saitama as he saw how Mizuki teased the tip of his dick head with her tongue to then suddenly stop.
"Muah! muah! muah!"
Suddenly she started to kiss and lick his stomach, her tongue tracing the lines of his abs.
She could feel his cock throbbing, the heat of it radiating through her hands. She then kissed lower, her tongue dipping into his navel, then lower still, until she reached the base of his cock. She looked up at him, her eyes locked onto his, and she saw the raw desire in his gaze.
"I need protein Saita, and you are going to give it to me, so for that I will tease you and tease you until you give me my white protein." She said as she leaned in, her tongue flicking out to taste the sensitive skin of his balls.
"Ahh, fuck!!" Saitama groaned, his hips jerking slightly.
Mizuki's hands moved to cup his balls, her fingers gently rolling them in her hands. She felt him tense, his breath coming in short gasps.
She looked up at him, her eyes filled with a challenge. "You like that, don't you?" she whispered, her voice a low purr.
Saitama nodded, his eyes never leaving hers. Mizuki smiled, her tongue flicking out to lick the length of his cock. She could feel the pre-cum beading at the tip, and she licked it off, her tongue swirling around the head.
"Nggh!! Shit!"
Saitama groaned, his hands moving to her hair, his fingers tangling in the dark orange strands. Mizuki looked up at him again, her eyes filled with a mix of desire and mischief, she clearly was enjoying herself teasing him like this.
Suddenly, she leaned and warapped her lips around the head of his cock again. On that moment, Mizuki heard Saitama's sharp intake of breath, felt his hands tighten in her hair.
So she knew what to do now, she took him deeper, her head bobbing up and down, her tongue swirling around his shaft. Meanwhile Saitama's hips started to move in an unconcious way, his cock thrusting into her mouth. While Mizuki's hands moved to his thighs, her fingers digging into the firm muscle.
She could feel his cock throbbing and how the tension built up in his body. She looked up at him again.
"You want to come, don't you?" she whispered, her voice a low purr.
Saitama nodded, his eyes never leaving hers. Mizuki smiled and then her head started bobbing faster, her tongue swirling around his cock. She could feel him tensing, could feel the tension building in his body.
"Come for me, Saitama," she whispered, with a sexy tone.
This bitch! He thought as he felt his release finally coming.
And with a groan, Saitama came, his cock pulsing in her mouth, his hot cum spilling down her throat.
Spurt! Spurt! Spurt! Spurt!
Mizuki swallowed, her eyes never leaving his. She could feel his body relaxing, could feel the tension leaving his body. She looked up at him, her eyes filled with a mix of satisfaction and amusement.
She pulled back, her lips wrapping around the head of his cock one last time to then suddenly let it out with a loud pop! and looked back at him.
"That was just the appetizer," she whispered, her voice was still sultry and confident.
And with that, she stood up, her hands moving to her spandex top. She pulled it off, and her breasts spilled out, her nipples were already hard and erect.
Holy shit! She really is going serious. He thought as his eyes widened, his gaze locked onto her body.
And Mizuki smiled at this, seeing as she got his attention, her hands moved to her track shorts.
She pulled them off, revealing her toned legs and the access to her pussy, her body was now completely naked, her powerful muscles with years of training on them were now on full display.
She looked at Saitama, her eyes filled with a mix of hornyness and a little bit of challenge. "Now, it's time for the main course," she whispered, her voice a low purr. And with that, she moved towards him, her body pressing against his, her lips finding his in a passionate kiss.
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