Chapter Text
Being in Hatsume's lab meant to be her audience - To show off all her inventions, the things she improved from last time, the things she learned from her latest failures, she'd even hand her guests items she thought would be useful to them - Especially if said audience was Izuku. Although where most others would have to follow her around and let Mei bring them to all kinds of equipment and drop more in their hands - And with Izuku, it was somewhat similar; but when she was showing him her latest babies she'd have him sitting, then get onto his lap with whatever she wanted to show off, putting in all the work to get him to look at what she made.
Such as right now, where she was sitting with her back to his muscular chest, shuffling just slightly to press her ass against his bulge, feeling it throb slightly as it pressed into her soft behind. Almost immediately after, he slid his large, scarred hands under her tank top, grazing her soft flesh with the surface of his warm, rugged touch. "What's this one do?"
"It's a prototype baby for an improved version of your mask!" She eagerly answered, starting to blush harder as he looked over her shoulder to see better while moving his hand up, grazing over more of her supple skin until he was groping her breast - Instantly finding out that she has no bra to protect her from his fingers which massaged and toyed with her chest.
"I built in these super cute compressed air capsules in, so even if it can't filter your air, it can block it out while giving you some!" She elaborated, a twinkle in her eyes as she showed off the different parts.
"I see. That's great, Mei. Stuff like that can really save my life." He praised, taking the hand not on her breast and slipping it out before he started to pet her, brushing his large and coarse hands through her pink locks.
"O-Of course!~" Mei chirped, finally slowing down a bit as her cheeks became a little brighter. Izuku smirked as he felt her squirm a little in his lap, grinding her butt against his crotch a little harder. "At first I got the idea and did it just because I could - Then I thought about how good it'd be for you, so I made a new one that was more your style." She explained, ending with the same excited little giggle she gave after raving about her babies.
"Awfully considerate. I'll take the finished model once you work out all the kinks." He decided, to which Mei affirmed with a nod.
No mention or even thought of a payment was made. She invented things, and whatever Izuku wanted, commissioned, or otherwise needed went straight to him. It was a mutual relationship they shared: As in, they mutually agreed that Mei belonged in her lab or on her knees choking down his cock and referring to him as Master, so it came to a mutual business decision where they both signed off on any baby with her name on it was his, and anything sold by her would be at his discretion.
At the same time, they agreed that if they were going that far, and they agreed she was just as much his obedient, revering sex slave as she was an inventor, they decided they may as well rewrite it to make her, and therefore everything she makes, into his property.
So in this case, saying he'd "take" one of her babies would be taken more as: "I'm accepting this tribute from you, pet."
Mei set the prototype mask aside, pulling herself out of Izuku's lap for a few moments to grab another baby - Which she brought as she happily bounced back onto his lap.
This time, his hands went low, going over her hips, then one went to stroke her thighs, teasing her with grazes towards her ass while the other went between her thighs, feeling over her underwear and pressing lightly onto her sensitive crotch with two fingers. "And this one?"
Mei's body fidgeted as her insides trembled, revealing the dampness of her pussy as he pressed further. "A commissioned baby for legs - Super aerodynamic, cooling, lightweight leg coverings, they even automatically balance themselves!"
"For Iida, huh? I'm sure it's going to be very useful. You did good on this one too." Izuku praised her again and enjoyed the feeling of her trembling against him again, both from the praise and the feeling of his fingers curling against the thinly veiled hotspot of sensitivity that was her aching pussy and into an even hotter, more sensitive spot above it - Her clitoris.
Mei raised to get another baby to show him, but this time, he pulled her back down, slamming her hips into his lap while she gave a short cry of surprise. "Hey now, I'm not done looking at it." Izuku gently and teasingly told her off, before looking at the leg pieces again as he continued groping her, finally moving a hand to her ass and squeezing. "I see, I see. I'm bet you're proud of this, aren't you, Mei?"
"O-Oh yeah! I'm proud of a-all my adorable babies!" Mei chirped, feeling her body uncontrollably jittering as he slipped his thick fingers into her panties, giving her clit a small, curving touch that made her back arch against him.
"Such a workaholic. That's okay, I think it's cute for you-" He teased, giving her more reason to blush as he gave her another squeeze. "I was talking about all of this. I know you like pushing your tits on me, but I'd be dumb to ignore the rest of you."
Izuku smirked as Mei got even more flustered, her train of thought being sent into even further disarray as he refused to let up on his groping - Even if she said she was proud of her ass too, he would've called her a pervert, and said he was talking about her babies instead. Of course, it was hazing, but knocking the ever-eccentric and never-stopping Mei for a loop and making her flustered wasn't something he'd pass up.
He decided to slip his hand even further down into her panties, spitting the outer layers of her pussy with a single finger, making her itch to feel it deeper, or harder, or just anything more than what he was so cruelly teasing her with.
Izuku hummed to himself for a few moments longer, toying with her ass and sensitive, drooling pussy before nodding in satisfaction and letting her go. "Yep. Great quality, just as I'd expect from you, Mei. Anything else to show me?" A rhetorical question, of course. If you left her alone for half an hour she'd already have something new she whipped up to show.
"Mhm!" She answered, her breath short and her enthusiasm ever so slightly hindered by the fact that she wanted Izuku to keep fingering her and finish her off so she could cum in his lap, but nevertheless, she got up to retrieve her next baby.
She was left rummaging for a moment - And this baby was a bit on the bigger side, being a device much like a rifle, before eagerly making her way back, but once she did, she stopped as she looked at Izuku. He unzipped his pants and let his cock out, standing proud and free and awaiting her to sit in his lap again. "Oh? That looks interesting. Tell me all about it, Mei."
Mei, who was struggling with her buckling knees and salivating mouth, quickly nodded. Her speed practically tripled as she crawled onto his lap, leaving her pants and undies in her dust trail somewhere along the way, turned around and pressed her bare pussy against the tip of his cock. Without a word of instruction, she forced herself down, sliding his thick cock into her pussy as she bit her lip and breathed heavier. Her pussy trembled and clenched around his cock, hot and happy to welcome him, yet struggling to take him properly at the same time, creating a noticeable bulge under the tank top before she even took half of it.
Finally, she forced herself all the way down with a quick, whimpering moan as her ass clapped against his lap. Satisfied, Izuku grabbed her ass again but didn't lead her, leaving it to her to start riding him, which she managed to do soon after her insides were reacquainted with him, letting her do so comfortably before she started on her next baby:
"Th-This prototype baby is what I-I think of as a rifle and a slingshot!" She started, raising it so he could see better - While at the same time picking up her pace and panting between words as his hands slipped into her tank top and began grabbing her chest again.
"Sounds interesting… I'm guessing it's an item more for Quirk efficiency instead of a weapon?" He asked, looking it over and keeping his tone in control, unlike Mei who was still panting slightly and shuddering each time she came down.
"Exactly!~ I-It gives what it's f-fed a good charge, concentrates it, and gives it a m-massive boost on discharge!" She explained, careful not to get the sweat now cascading down her body over her baby.
"Oh like my Air Force gloves? Clever. The charge and boost parts are new, is that what the cartridge things on the sides are?" Izuku pinched Mei's nipples the moment she was about to answer, making her back arch slightly as she moaned, while also making her pussy spasm around his cock as if he needed any more affirming of how sensitive her breasts were.
"R-Right again! Oh!~ I know s-some heroes it would b-be really useful to! Y-You could have it f-for your black, stringy Q-Quirk!"
Izuku nodded as he thought about it. Blackwhip had tons of range and he could shoot it straight already, so with something like this he'd probably be able to snipe someone with it across a city like Lady Nagant. "That's a good point, Mei. May I?"
"O-Of course!" Mei answered just as eagerly, handing it to him as he (regrettably) pulled his hands off her tits and out of her shirt.
"Hm." He looked over the thin, rifle-like support item while Mei continued riding him, holding onto his thighs for support as he nodded.
Then, he raised it up and over her head like he was going to give it back, before immediately bringing it back, holding the body to her throat and pulling back until she was stuck with her neck caught between her baby and his muscular chest, and with just a little more force, he was choking her out with it.
Her hands reflexively went up and grabbed it, but once it really started to hit she wasn't holding it to pull away, just to grip it as hard as possible as she kept riding Izuku's cock, her thighs and legs burning as she put her all into slamming Izuku's cock into the deepest and most sensitive areas of her cunt.
"You're right, this is useful. You can always make more of these to sell, this one's mine." He decided with an affirming nod, pulling it back a little to make her choke again as her pussy clenched. He smirked wider to see her eyes rolling back as she lost herself to pleasure, letting her mind that was always in baby-making mode turn off and go to a much more primitive baby-making mode.
"I could always use my arm, or a bar, or Blackwhip… But I'm never passing up how tight you get when I use your precious babies against you for that." He teased, plus, there was simply the novelty of having her work so enthusiastically to produce more babies so he could use them as more rudimentary sex toys.
And you'd best believe him when he says he's found lots of creative uses for all the babies she created. Restraints, tools to hit her with, shock her, burn her, freeze her, shut her brain off completely - He even once made use of a full body power armor by setting her in it after going a few rounds, covering her in one more load, and locking her in it for a night to marinate in his cum, and by the time he pulled her out, she'd eaten all she could, and was left in a dreamy, lust-induced haze it took her a day or two or recover from.
But speaking of things she'd need to recover from - Izuku pressed the gear against her throat even harder as he started to thrust, meeting her bounces as she came down with even greater force, driving the tip of his cock into her cervix so hard it made her entire body jolt as she rose again, only to slam her hips down again to be hit with another wave of pleasure.
Mei's breath only came out as strangled, whimpering gasps, barely audible over the sound of her ass smacking into his lap over and over again.
Izuku began pressing it against her throat even harder the moment he felt himself throbbing and coming closer to cumming inside Mei - And he couldn't tell if Mei could tell he was close, or if it was because she just wasn't in a state to express her excitement, but it didn't matter. Instead, he just started bouncing her on his cock harder, meeting her descent with an overwhelmingly strong thrust, enough to make her choke and moan even louder as he squeezed cries of delight out of her.
Soon enough, Izuku came, feeling Mei's spasming, clenching pussy as she came as well, basically begging his cock to empty itself entirely inside her, which he happily did with every pump, blowing hot seed straight into her pussy, making a larger and even more noticeable bulge through her tank top.
Izuku pulled her baby away and set it aside, finally allowing her to heave for air and cough up some saliva caught down her throat. "Wheeew… S-So, have time for me to show you more babies?"
"Always, Mei."