Chapter 30: A Crater, a Giantess, and a Glimpse of the Sky!!

The training field was as deserted as ever, a wide stretch of packed dirt between empty hills, a few trees along the edge and the reinforced walls at the back still standing from last time.

Izuku got there first, notebook tucked under his arm and a grin that hadn't stopped growing since they'd stepped off the train. Yu trailed a few steps behind, shaking the dust off her shoes every couple of seconds and cursing under her breath.

"Midoriya, I'm warning you. If you dragged me all the way out to the middle of nowhere for another one of your weird ideas, I'm leaving you right here and taking off!" Yu pushed the hair out of her face with an annoyed flick.

"It's not a weird idea, boss! It's the best idea I've had in weeks!" Izuku turned to face her while walking backward, unable to hide how pumped he was. "I've been thinking about this for days and I just couldn't wait anymore. Trust me! I promise this whole trip'll be worth it!"

Yu narrowed her eyes.

"Every time you say 'trust me,' Midoriya, it makes me wanna trust my gut and run the other way."

"But this time I mean it!" Izuku stopped in the middle of the field and threw his arms open. "Remember what happened with Nemuri-san?"

Yu huffed and caught up to him, crossing her arms.

"Kinda hard to forget."

"If that happened with Nemuri-san, I wanna see what happens if I try it with you!" he said, eyes lighting up.

Yu narrowed her eyes.

"...mmmm... Okay, you've got me. Talk. I'm listening."

"I spent all night online digging up info on giants," he blurted, pulling out his phone like it was hard evidence. "Giant villains, giant mythology, old photos... all of it! And you know what they've all got in common?"

Yu arched an eyebrow.

"Go on. Enlighten me."

"Strength! A body that huge has gotta hit like a mountain, or it makes no sense at all. And you, boss, with all the respect in the world, you're a gorgeous giantess who punches like any run-of-the-mill hero. It's a criminal waste!"

Yu just stared at him in silence while a vein started throbbing on her forehead.

"'Run-of-the-mill hero'? 'Criminal waste'?" she repeated slowly.

"It's the truth, and it's fixable!" Izuku took a step toward her, getting more and more worked up. "If I really focus, aiming all my power at your strength instead of the usual quick boosts, I think I can get you to hit like what you actually are: a giant hero who can put the fear of god into people."

Yu uncrossed her arms and, even with the annoyed look on her face, she seemed interested.

"So your grand plan is to grope me in an open field until something blows up."

"Well, aren't you the smart one. My grand plan is to turn you into the strongest hero in the rankings," he said, looking her in the eye. "If there's a little contact along the way, I'll take it as a hazard of the job. It's a sacrifice I'm willing to make."

"Yeah, yeah... what a noble sacrifice. Almost had me believing it. But let's get to the important part. What happens if it goes wrong? What if you leave me with a ten-foot arm? Or something even worse?"

"That's exactly why we came all the way out here!" Izuku pointed at the empty field. "If something weird's gonna happen, let it happen here, where there aren't any cameras or people around. Imagine I get the bright idea to try it in the middle of a mission and you end up doing something building-sized in front of all of Japan."

Yu went pale.

The mental image was a whole lot scarier than any small-time villain she'd faced that week.

"...Fine. But if anything weird pops out of my body, I'm using you as a baseball, and this time I really will launch you to the other end of the field."

"Deal."

Yu narrowed her eyes while she thought about all the ridiculous situations she'd gotten into with Izuku.

She'd promised to help him figure out his ridiculous Quirk, and a promise was a promise. Besides, she was no fool. The kid was her direct ticket up the rankings, and a smart hero never wastes an advantage that juicy.

"Alright. What do I have to do?"

"Nothing, boss. Just stand still and relax. I'll handle the rest, just trust me."

Yu huffed, stepped away toward the clear center of the field, and stood there with her arms crossed. The sun was beating down and there wasn't a single cloud in the way.

******

Izuku positioned himself behind her. Yu felt the warmth of his body against her back before his hands, and she started getting nervous, her breathing more and more ragged.

"H-hey," she stammered. "Is all this really necessary? Can't you just try it with my shoulder and be done with it?"

"You already know the shoulder isn't enough," Izuku said, fully committed to his role.

And then his hands closed over her breasts.

"Hngh!" A moan slipped out of Yu that mortified her instantly, and she clapped a hand over her mouth. "I-Izuku! Y-you shameless... You pervert! You...! Who ever heard of an assistant doing this to his boss, huh?! Ngh!"

"It's the best spot there is," he answered, starting to knead with open hands. "Wide and soft, tons of contact. Perfect for working in peace."

"You...! Ugh... mgh..."

Yu gritted her teeth. His hands moved slowly, sinking into the softness, sliding up and pressing with a calm that put her on edge. Every time his fingers closed, a tingle ran through her chest.

"Stop... ngh... ahh... s-stop kneading like that," she panted. "You're supposed to be working, not making bread at a bakery."

"Just relax, Yu, I know what I'm doing." His thumbs grazed a barely noticeable ridge under the fabric. "Oh, look at that, boss, you react a whole lot more right here."

"NGH! HAHH..."

Izuku, lost in his role, caught the hardened nipples between his fingers and pinched them gently while he twisted them slowly.

"Oops, my hand slipped," he said, not sounding the least bit sorry, and pinched the same spot again.

"Ahn!" Yu doubled forward, grabbing her knees to keep her footing. "HAHH... Hah... S-stop doing that, you freckle-faced pervert!"

"Just hold on a sec," he said, closing his eyes to concentrate. "I swear I'm trying my best, just hang in there a little longer!"

Behind all the fake calm, Izuku had his mind fixed on a single image: Yu splitting the sky with one punch, and he pushed his Quirk toward that idea with everything he had. The problem was that his body had decided to join the experiment on its own.

Yu noticed it before she understood it. Something firm pressed against her rear, freezing her completely.

"I-Izuku..."

"Mmm?" he murmured, eyes still closed.

"What the hell do I have poking me in the... In my butt?!"

Izuku cracked one eye open, swallowed, and kept his voice as calm as he could.

"I-it's nothing, Yu, you're just imagining things, hahaha."

"What do you mean it's nothing!"

Yu turned her head and shot him a sidelong look over her shoulder.

"OKAY, I ADMIT IT! I'm a completely normal man, ALRIGHT?!" he defended himself before she could launch into the lecture. "I've got the sexiest hero in all of Japan pressed up against me. Any guy in my shoes would be the same or worse. Oh no... that's it! This is where I get fired!"

"You could at least try to hide it a little!"

Yu opened her mouth to hurl the thousand creative insults that had run through her head. But a pleasant tingle started spreading through her breasts, right under his hands, and traveled slowly down to her belly, spreading through her whole body, leaving her breathless. The feeling was so good her knees went weak, and without thinking she pushed her hips back, grinding against him.

Izuku felt it and came damn close to throwing all his concentration out the window. He already knew perfectly well that his boss was a succubus with a hero's license, and holding on like this, with her rubbing up against him, was a torture no hero handbook covered.

"Y-Yu..." he said through his teeth. "Control your butt, please."

"I'm not doing it on purpose, idiot! Ngh... Ahhhahh... It's just... s-something feels way too... Ahhhhhhhhhhhhh!"

Suddenly, Yu started growing. Her body shot upward with a boom of displaced air, and Izuku was flung backward, rolling across the dirt for a second before the giant shadow blotted out the sun.

When he looked up, Mt. Lady towered over him, sixty-five feet of blonde hero breathing hard, cheeks still red.

Holy mother of all giantesses... This looks like something straight out of a hentai.

"Yu, don't transform without warning me!" Izuku yelled from the ground, brushing the dust off his clothes. "You almost lost yourself an assistant!"

Yu spun toward him, a vein bulging on her forehead.

"Oh, so now it's my fault?! You're the idiot going around putting his hands where they don't belong!"

Izuku got to his feet and shaded his eyes with his hand to look at her against the sun.

What a view... Yu's way too gorgeous...

Izuku studied her body in detail, looking for anything out of place, an extra arm or some uneven size. But everything looked normal. Giant, sure, but the usual size, nothing weird in sight.

Hmm... Did it work? She looks the same as always. Maybe I screwed it up and made a fool of myself in front of her.

"Booosss!" he shouted, cupping his hands into a makeshift megaphone. "Do you feel anything different?!"

"Different how?" she called back from above.

"I dunno! Anything weird you notice!"

Mt. Lady thought for a moment, checking herself over. She flexed an arm and gave a test stomp that made the ground shake a little.

"Mmmmm! I feel the same as always! I don't notice anything weird anywhere!"

Izuku scratched his head, frowning.

No way. Maybe I was distracted, but I tried hard. It worked on the first try with Nemuri-san. Why isn't it showing with her?

He turned it over in his head for a while, until he hit on the perfect way to check.

"Boss!" he shouted again. "Punch the ground with everything you've got!"

"You sure about that?"

"Totally sure! Just trust me!"

"That right there is exactly why I never trust you!"

Mt. Lady pulled her fist back and drove it toward the earth with all her strength. At the last second, her arm slipped out of her control, moved way faster than she'd expected, and the momentum dragged her forward until she was about to fall flat on her face.

The fist didn't even reach the ground.

The blast of air it shoved ahead of it blew the terrain apart anyway, opening a huge crater right where the punch would've landed, and a gust of wind shot out in every direction.

Izuku, who'd run to take cover behind a reinforced wall, watched the trees along the edge bend backward and shed a rain of leaves while his face got coated in dust.

It worked, he thought, grinning. Hell yeah, it actually worked!

"WHOA!" Mt. Lady yelled, staring at her fist with her mouth hanging open. "Did you see that, Izuku?! I didn't even touch the ground!"

"I saw it, I saw it!" Izuku came out from behind the wall with his arms raised. "That was insane! Do it again!"

Mt. Lady didn't need to be asked twice. She threw another punch into the air and the wind howled with the motion.

"HAHA! This is amazing!"

She tried a hook, put too much force into it, and spun halfway around, staggering like she'd just gotten off a carousel.

"WHOA! Why am I moving so much?! My own body's cheating on me!"

Every move came out clumsier than the last, her body answering with triple the power she asked for, and more than once she nearly kissed the dirt.

"This is totally nuts!" she laughed, testing a stomp that cracked the ground open. "I'm clumsy, but super strong! Izuku, look, look at this!"

"I see it, I see it! Dial the excitement down a notch before you sink the whole field! I'm not that durable, y'know!"

"Party pooper!" she yelled down at him, howling with laughter.

Mt. Lady took a couple more jumps, shaking the ground under her feet, and then started shrinking, the enormous silhouette dropping lower and lower until Yu was back to her normal size, hair a mess and a thrilled grin on her face.

Before Izuku could even open his mouth, Yu threw herself at him and caught him in an impulsive hug.

"WE DID IT!" she shouted, squeezing him against her chest. "I'm officially the strongest hero in the city! And it's all thanks to your pervy hands! Genius sidekick, I'd kiss you right now if I could!"

"B-boss..." Izuku's voice came out strangled, his face buried between her breasts. "B-boss, wait..."

"Huh? What's wrong?"

"Y-your strength... it's still... it's still there..."

Yu blinked, not getting what he meant, and then looked down. Izuku was turning purple, crushed against her chest by a hug that now had the power to pop him open like a can of beans.

He was one squeeze away from heading straight to the great beyond.

That's it... Remember me for what I was: a genius breast enhancer. Death by a pair of tits, huh? I'm proud of myself. Hope I make it onto that "1000 Ways to Die" show.

"Oh, sorry!" Yu let go instantly, and Izuku dropped to his knees, gulping down air in big mouthfuls. "I forgot you're such a weakling!"

"Air, I need... air," he panted, one hand on his chest.

"Quit being such a drama queen and breathe normally!"

Izuku raised a trembling hand while he caught his breath.

"I think... I think for a second there I saw the sky, boss. It was beautiful. There was a light at the end and everything."

"Cut it out with the nonsense and get up, you big baby!"

Izuku stayed sitting in the dirt a moment longer, recovering, and started to think.

His Quirk never stopped giving him headaches. With Nemuri it had changed the whole form of her power, a gas turned into a drop; with Yu it had cranked up her strength to an absurd level just by wishing it, and other times he'd busied himself making body parts grow and shrink that were better left unmentioned out loud.

Three results with nothing in common, and none of them quite fit with the others.

What's my Quirk even supposed to be? Training. Your name doesn't do your potential justice.

He got to his feet with a sigh and brushed the dirt off his pants.

"Alright, that's enough training for today," he announced. "I'm not sticking around until the strength drains out of your hands and I end up squashed like a bug on the ground. That hug already gave me a good scare for the day."

Yu let out a laugh and shoved his shoulder.

"Dramatic to the very end, huh? A real hero can take a hug from his boss without bursting into tears."

******

They grabbed their backpacks and set off down the road toward the train station. Yu gave a distracted kick to a rock on the path, and it shot off like a bullet, disappearing into the hills with a whistle that left them both staring at nothing.

"...Guess I'm on dish duty tonight," Izuku muttered, swallowing hard.

"I didn't even try," Yu said, looking at her foot. "Hey, one thing. This thing you did to me, how long's it supposed to last?"

"No idea," Izuku admitted. "With Nemuri-san I think the change was permanent, though I still haven't been able to ask her properly. But with you it could last an hour... or a week. Guess we'll just have to wait and see."

Yu stared at him.

"...What do you mean 'wait and see'?!"

She pointed at herself, indignant.

"I'm about to get on a train packed with people, and I just launched a rock to the other end of the valley by taking a step! And your plan is to cross your fingers and wait?!"

"That's exactly why I plan on looking after you the whole way," he said, and took her hand without any further explanation.

Yu looked down at their laced fingers without breaking her stride.

"Well, well," she murmured as a blush crept onto her cheeks and a mischievous smile started forming on her lips. "Aren't you bold. Taking my hand in public without asking permission. What if the press catches us?"

"It's for public safety," Izuku answered. "If your strength gets out of control halfway there and sends some poor bystander flying while they're just walking along minding their business, someone's gotta hold you steady. I'm sacrificing myself for the good of the people."

Yu laughed and gave him a light elbow.

"Yeah, sure, the public good. How noble of you. Way too noble for a guy like you."

She glanced at him sideways, clearly amused.

"C'mon, drop the act. Just admit it already and save us the theater: you like holding my hand."

Izuku met her gaze. Instead of letting go, he laced his fingers a little tighter with hers and kept walking with a smile.

"Well... to that, my dear Yu, I can't say no."

*******

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