Haahh... getting dragged by the prettiest girl in school into a room, just the two of us. Did I die and reincarnate into an otome game?
Izuku followed Momo down the yacht's inner corridor while she walked with her back straight and a firm stride.
The place was gorgeous from every angle, with several cabins lined up along the passage and each one prettier than the last, decorated with an elegance that screamed money from every corner.
The Yaoyorozus really don't cut corners on anything, huh? I've got an All Might poster with one corner peeling off, and she's got a boat with more rooms than my whole neighborhood.
"Midoriya-san."
Momo's voice snapped him out of his trance. She was already inside one of the cabins, standing by the entrance, looking at him with a determination that Izuku found cute.
Izuku, faithful to his sacred philosophy of saying yes to anything that sounded even remotely promising, walked in without a second thought.
The moment he stepped inside, Momo shut the door and slid several locks into place.
A shiver ran down Izuku's spine and a bead of cold sweat rolled down his forehead.
Okay... this is exactly how it happens in the movies. Why didn't I catch on sooner?! When the cute girl leads you off somewhere private, it always means something bad. It never ends well for the protagonist.
"Midoriya-san?"
"YES!" Izuku raised his voice. "Ahem. Momo-chan, don't worry, I won't tell a soul."
"Excellent. That's exactly what the procedure requires."
Procedure? WHY DOES EVERY WORD SHE PICKS SOUND LIKE A CLANDESTINE OPERATION?!
Momo walked over to a small desk built into the wall and set her notebook down. She activated her Quirk, and a coiled measuring tape sprouted from her hand, which she placed next to it, aligning it with the edge of the notebook.
"I brought the basics, though I preferred to fabricate the rest here to guarantee accuracy," she explained without looking up. "Improvised instruments introduce a margin of error, and in a serious study we can't afford that."
"O-of course," Izuku nodded, not understanding even half of it. "I, um... I understand perfectly."
A measuring tape. What does she need a measuring tape for? Think, Izuku, think... Oh, no. Could Momo have a BDSM fetish? No way, not her. Or... could she? You never know with rich heiresses, they've got some really weird hobbies.
Momo opened the notebook to a page covered in diagrams drawn in flawless handwriting and ran her finger down a list of numbered steps.
"We'll replicate the exact conditions of the previous session," she said, turning to the next page. "The important thing is to reproduce the contact precisely as it occurred in the classroom, without deviating from the original method in the slightest."
"Contact?" Izuku blinked. "So you're not gonna tie me up?"
"Huh?" Momo looked at him blankly.
"Ahem, nothing, nothing, go on, you've got my full attention," Izuku waved his hands with a nervous smile.
So that's what it was, huh... Dang, I'm kinda disappointed.
Momo studied him for a second, decided she'd misheard, and continued explaining her plan. Izuku let her talk while his brain worked at full speed, and that was when he noticed the detail that had completely slipped past her.
"Mmm... Momo, I really appreciate your enthusiasm," he interrupted carefully, "but I think you're missing a pretty important point."
Momo stopped. That was the last thing she expected to hear from someone she'd just dragged into an experiment.
"An important point?"
"We haven't even checked your manual." Izuku gave her a thoughtful look. "Shouldn't we see first if anything changed there, before jumping straight to the theory that your breasts grew because of the double contact?"
Momo's eyes slowly widened. She'd gotten so caught up in the effect Izuku's Quirk had on her metabolism that she'd jumped straight to a new hypothesis, setting aside the very foundation of her whole methodology. A flush of embarrassment spread across her face.
I let my excitement carry me away and jumped straight to a new hypothesis without checking the record first... How could I make such a basic mistake?
"You're... you're absolutely right, Midoriya-san," she admitted, and for a moment her usual composure wavered under the embarrassment. "I rushed to formulate a hypothesis without first verifying the available data. That wasn't like me at all... I should have started there."
Izuku Midoriya, pioneer of modern science, he thought proudly. I out-reasoned the class genius. That deserves a celebration.
In a nutshell, the conclusion was beautiful in its simplicity: to check the manual, all he had to do was squeeze her breasts again.
"Then let's proceed with the analysis of the manual." Momo straightened her back and picked up the pencil again. "But for the results to be genuinely comparable to those of the previous session, we first need to establish reference conditions. If we leave external variables uncontrolled, we could end up attributing an effect to my Quirk that actually comes from the environment."
"Sure," Izuku said, without the faintest idea what she was talking about.
"We should record the time, the cabin temperature, and what I ingested this morning. Even my physical state could influence the performance of my Quirk," she explained while flipping to the next page and beginning to draw a table. "It would also be advisable to account for the yacht's movement. The swell could introduce small variations in the measurement, and..."
"Um... Momo."
"...if those variations aren't constant, we could mistake them for a genuine fluctuation of my ability. In that case, we'd have to repeat the tests under more stable conditions to ensure the results are reliable..."
"Momo-chan."
The pencil kept moving across the paper. Izuku raised a hand, hoping to find some appropriate moment to jump in, but that moment didn't seem to exist.
"...and it would be advisable to take several control measurements before considering any result conclusive. We should also leave a sufficient interval between each test to prevent the strain of one from affecting the next..."
"Yaoyorozu-san."
"...that way we can determine with greater precision whether the changes we observe truly correspond to a permanent improvement or if they're simply a temporary response..."
"Yo, Izuku to the Yaoyorozu Mountains, over and out."
Nothing... not even a blink.
Momo kept drawing boxes and jotting down headers, so lost in her own world that Izuku could have caught fire without her looking up.
He sighed. He knew only one way to bring her back to the land of the living, so he decided to speak to her in the one language he'd mastered to perfection: the language of breasts.
He reached out and squeezed them gently.
Home sweet home.
"Haahh... as soft as the day I lost them."
"Ngh...! M-Midoriya-san!"
"Huh? Didn't you want to test your theory?" Izuku looked at her strangely.
"Y-yes, but...! B-be gentle!" Momo gripped the edge of the desk with flushed cheeks.
Huh? Isn't that the famous line from hentai?
Izuku shook his head and got back to it. The sensation was different from anything he'd imagined, and even though it wasn't the first time he'd touched them, for some reason it felt like he was discovering them all over again. They had a natural firmness that yielded willingly under his fingers, holding a steady warmth that came right through the fabric of her clothes.
Mmm... they got softer... Wait a second. They got softer?!
Izuku furrowed his brow. He was an expert on the subject, a seasoned professional, and he wasn't about to let a single detail slip. He began to knead them slowly and gently, forcing himself to focus on the texture and not on the erection threatening to ruin the seriousness of the moment.
Yep, they got softer. They used to be firm, now they give way faster.
Izuku gave in to his scientific and serious attitude, even if the context was less than scientific and more erotic than planned.
"Ngh... hah... M-Midoriya-san... are you done yet?" Momo pressed her lips together.
Izuku moved his fingers toward a pair of firm points showing through the fabric. They were so obvious after the initial pressure that he located them right away.
"Nnngh...!"
Momo let out a sharp, involuntary moan, arching her chest as she leaned back while closing her hands over his shoulders to keep her balance. The blush had spread far past her face.
"M-Midoriya-san! Ah...!" She swallowed and pressed her thighs together hard as the air escaped between her lips. "T-that area is especially sensitive, so it isn't necessary to examine it so directly."
"Whoops, sorry." Izuku eased the pressure.
Focused on his work, he wasn't doing this to take advantage anymore; what had started as a simple lie to dodge Momo's scrutiny had given way to a genuine investigation on his part.
"Momo, by any chance have your breasts felt more sensitive lately?"
"M-more sensitive?" she repeated, caught off guard and struggling to concentrate. "Hah... n-now that you mention it... yes, I think I've noticed a certain sensitivity these past few weeks. I attributed it to the friction of the uniform."
She fell thoughtful for a few seconds before looking at him with a curiosity that won out over her embarrassment.
"Why do you ask? Did you find something relevant?"
Izuku ignored the question as he looked down at his hands.
Breast growth, greater softness, greater sensitivity... Mmmm, could my Quirk be influencing the girls' physical appearance somehow? he thought as he kneaded them, using them like stress balls. I see.
Without bothering to read Momo's manual, he took the measuring tape she had made and passed it around her chest with an attentiveness that would have looked very professional if not for the context of the situation.
"Momo, what did your breasts measure?"
"My... bust?" Momo tucked a stray lock of hair behind her ear, still uncomfortable. "T-that question... sigh The last time I measured, they were eighty-eight centimeters."
Izuku looked down at the tape, checking it again and again in case his eyes were playing a trick on him.
Pfff... how the hell did she go from 88 to 93?
"Momo-chan, I've got good news for you. Your breasts grew five centimeters."
"They grew...?" Momo's eyes opened slightly as she looked down, disbelieving. "Five centimeters?"
She brought a hand to her chest, still not fully believing it.
"That's... quite a bit more than I was expecting." She furrowed her brow. "So it really could be related to the alteration of my metabolism. Such a noticeable change..."
And immediately, in a much more serious tone, she pointed a finger at him.
"But, Midoriya-san, you shouldn't be quick to consider this 'good news.' If there really has been such a sudden physical change, we first need to determine the cause."
Izuku placed his hands on her waist without a hint of shame and pulled her a little closer as he gave her a smile.
"That's exactly the thing, my dear Momo."
Before she could ask what he meant, Izuku adjusted a pair of glasses with a finger.
Huh? Where did he get those glasses? Momo looked at him with a confused expression.
"If my hypothesis isn't wrong..." Izuku scribbled in a notebook.
And where did he get that notebook? Momo was even more baffled.
"And if my judgment is correct, Momo-chan, your body is somehow adapting to my Quirk. Your breasts grew, they got more sensitive, and on top of all that, now they're softer too..."
"SOFTER?!" Momo's eyes flew wide in shock. That part hadn't been mentioned to her.
"Ahem, yeah, they got more comfortable, but that's not the point... This means your body is somehow adjusting to my Quirk, I think to receive the best possible enhancement... It's like, um..." Izuku scratched his head; he couldn't find anything to compare it to.
"As if my body were optimizing itself to better take advantage of the effects of your Quirk?" Momo completed the thought, bringing a finger to her chin.
Her expression gradually shifted from embarrassment to concentration.
"I see... In that case, we wouldn't be talking about a random modification, but rather a progressive adaptation. An adjustment specifically oriented to the characteristics of your Quirk."
She looked at him with growing seriousness.
"If your hypothesis is correct, my body would be identifying the characteristics of your Quirk and modifying itself to respond to them in the most efficient way possible. Like a muscle that strengthens with repeated use."
She narrowed her eyes, completely focused on the problem, forgetting how close she was to Izuku.
"Though there's one part I still don't understand. Why precisely those changes and not others? If this really is an adaptation, there should be a reason behind each one of them."
"Momo-chan," Izuku said as he rested a hand on her waist again while the other went back to kneading her breast, sending the deep blush right back to her cheeks. "Have you thought that maybe... your power got stronger?"
"Huh?"
"Think about it. We never checked what happened with your manual after the double contact." Izuku looked her in the eyes. "Maybe it's changing to support a Quirk stronger than before."
Momo was left speechless. Him giving her back her own way of thinking had an effect on her chest she didn't know how to describe.
She took a deep breath and closed her eyes. If she wanted to know the truth, she couldn't let embarrassment interfere with her judgment.
"...Then check it," she finally murmured.
She opened her eyes and slowly recovered her usual determination.
"Midoriya-san... I need to know for certain. If there's a possibility that my Quirk has changed, we must confirm it properly... Even if the method is embarrassing, the truth must be more important than my pride."
Yes. I already made this decision that time in the U.A. hallway. I'm not backing down now.
Izuku watched her, admiring her determination.
It's incredible how serious she gets when she decides on something. Though... maybe I should remind her that I've still got my hand on her breast.
"Understood," he replied with heroic determination and an inner glee he was very careful not to let show. "I'll make the necessary sacrifice. Again."
Momo narrowed her eyes.
"Stop calling it a sacrifice." Her tone turned slightly drier. "I know perfectly well that you don't find it unpleasant."
"That's a very serious accusation, Momo-chan. You don't have any proof."
"Your expression is proof enough."
"..."
Am I that obvious?
Izuku decided he wasn't going to win that battle, so he let it go. He closed both hands firmly around Momo's breasts and concentrated.
[QUIRK ANALYSIS INITIATED]
NAME: CREATION
USER: MOMO YAOYOROZU
---
A/N:
Renowned chest scientist Izuku Midoriya has reached a pivotal moment in his research. Will he uncover the secret hidden behind the Yaoyorozu mountains? Or will he need to dig a little... deeper? For heroic purposes, obviously. Maybe with the lab coat off this time. You never know. It's all in the name of science!
Find out next time on The Wild Adventures of Izuku: Unveiling the Yaoyorozu Mountains!
--
Author's Note:
Hey, amazing readers! Quick heads-up: my Patreon is 50% off for a limited time, so if you've been on the fence, now's your chance. You can read ahead all the way to Chapter 62 at patreon.com/shurazero.
On top of that, you'll get access to SFW and NSFW image sets featuring a bunch of different characters, and not just from MHA.
Thanks so much for reading, and have an awesome night! The sale won't be around for long, so don't miss it: patreon.com/shurazero