Don't Fight, Have Sex (1)
"Mmm...♡"
"Is this about right?"
"Yeah♡ Just like that... a little gentler...♡"
Yuria's sweet, aching voice began to fill the entire clubroom, and I focused everything I had on tormenting her breasts.
Come to think of it, we'd been working on developing these for months now. Somehow it had become so regular that it almost felt like part of the daily routine.
"Hhk...!"
Personally, though, I loved every second of tormenting Yuria's chest. Normally she kept that poker face of hers locked down tight, but the moment she came, her expression turned so adorably wrecked it was almost unfair.
Sure, I thought every pretty girl's orgasm face was cute and beautiful. But seeing a look she never made in everyday life made it feel even dirtier.
"You're getting better and better at timing your climaxes."
"...If I just let go right away, it doesn't feel as good. Holding it in as long as I can and then exploding is better."
She said that, but her nipples had been developed so thoroughly that if I deliberately cranked up the stimulation, I could force her over the edge anyway. That was how sensitive they'd become. No wonder she'd taken out the piercings we'd put in last time—she'd said she couldn't function in daily life with them in.
Honestly, even months of dedicated breast development from someone she liked shouldn't make someone this sensitive. Maybe she'd just been born with a naturally filthy body?
"Ah—!"
"Does it hurt?"
"No, it feels good.... Hnngh...♡ Mmph♡ Nngh♡"
It wasn't quite strong enough to make her come on the spot. But when I used my nails to give her a touch firmer than a normal caress, the pleasure started climbing toward its limit, and a trembling that mixed with that strange pre-orgasm sensation began to travel through her.
"Nnh♡ Nnh...! I'm going to come. Just a little more. More...♡"
"Alright. Stopping."
"Haaauu...♡"
I cut the stimulation right before she tipped over. Doing it this way was better for long-term sensitivity gains. Once she actually came, that razor-edge sensitivity inevitably dropped; stopping her like this kept her hovering at maximum sensitivity for a while longer.
"Haa... what do I do...♡ All I can think about is wanting to come."
"Want me to let you?"
"Just a little more... push me to the edge...."
Even as she said it, the panties between her spread legs were on full, shameless display. Soaked through with her juices, they clung so wetly that the outline of everything underneath showed through in perfect detail.
Without thinking, I reached down and touched her there. Slippery, filthy wetness stuck to my fingers and made an obscene sound. But because her breasts had been developed so far beyond everything else, touching her pussy barely got a reaction.
How did her chest end up more like a pussy than her actual pussy?
A girl whose nipples were more sensitive than her clit. No matter how I looked at it, that was an insanely erotic setup. Thinking that, I casually slipped my fingers inside her panties.
A slick, sticky texture coated my hand. Her pussy fluttered open and closed with her breathing, as if trying to swallow my fingers whole.
"Nnh...?"
"I'm going to get this all over them."
Of course I had no intention of developing her pussy at the same time. What we were doing right now was pure nipple training. If I started touching her down there before the breast work was finished, her pure chest orgasms would get linked up with vaginal pleasure and lose that purity. That was the absolute last thing Yuria wanted.
"With this wetness...."
"Hauut!? Ukh♡"
I coated both hands thickly in her juices and, still slick, started working her breasts again. The kind of pressure that would normally feel a little too rough was softened by the lubrication into something just right—nowhere near as gentle as my usual light touches, yet the sheer volume of sensation was huge, so the pleasure-to-effort ratio shot way up.
"Hahk♡ Nnh♡ Nnnngh♡ Ukh!? No♡ Nooo♡ If you do more there...♡"
Her face right on the edge of climax was so hot I almost finished her off without meaning to. But her pleading voice somehow let me hold back.
Damn. Honestly, if I'd pulled my cock out and stroked it right then, I could have set a personal record for fastest orgasm. That was how good she looked.
"Hau♡ Hauuu♡"
"So that's it for today? By the way, your chest keeps getting more and more perverted."
"My nipples and areolas keep getting bigger. I love how filthy they look. They're going to get even bigger from here, right?"
"...How big are you planning to go?"
Honestly, I had to admire Yuria for still clinging to that one trend from back then and turning it into long-term content she worked on so consistently. Sure, developing yourself to get more sensitive and enjoy it more could count as a hobby... but what kind of person made "nipple and areola development" their hobby?
"Do you hate looking at them?"
"No. Honestly, knowing my hands did this to you just makes me harder every time I see them."
It started with spraying cum on a girl's body and ended with pumping a womb full of seed. A man marking a woman with his own traces was always hot. Yuria was doing that with her nipples, so every time I saw those slightly raised areola mounds, it got me going. And the fact that they were starting to show through even thick clothes only made the effect stronger over time.
"Is it okay if I don't come on your breast-pussy today?"
"I feel it every time—if we do that, neither of us can hold back and we both end up collapsing. You sure?"
"That's true, but... Cali, your cock looks like it hurts."
I was about to say she could just strip again, bare those breasts, and offer them up like a blank canvas so I could use them as jack-off material and paint with cum—when the clubroom door opened and every line of dialogue got skipped.
Of course it did.
"Orca, you're here?"
"I finished early today too."
And of course Rosaria had to show up as well, which made holding on to the earlier mood basically impossible. If it had just been Orca, she would have thrown herself in with a "let me join," and I could have massaged her chest too. But even I had enough conscience not to push for something filthy with all four of us in the room.
"Ugh, and the whole room reeks of Yuria's sweat."
That was probably the scent of Yuria getting turned on more than actual sweat. Having lived a whole other life, I found the mix of juices and filthy body scent pretty nice, honestly. But I could see how Rosaria would just register it as sweat.
Anyway, the moment Rosaria pointed out the body scent filling the clubroom, Yuria—without letting the smile she'd been wearing slip even a little—lifted both arms behind her head to put her chest on full display and dropped a line designed to get under Rosaria's skin.
"I wash every day, but my chest is so big that sweat still builds up. Well... a senior with a cliff for a chest would never understand that feeling."
"What? Hey. You done talking?"
Watching her smile like that while needling Rosaria was getting me worked up all over again. And of course the spot Yuria had chosen to poke was the exact chest-size insecurity Rosaria always fretted over. I got to watch Rosaria catch fire faster than expected.
"These giant monster tits are always the problem. They seduce Cali, they make the clubroom smell weird.... God, it's so annoying I could die."
"Ah, so a senior with no chest isn't attractive to Cali?"
"That is not what I said! I accepted you being next to Cali—I did not accept you picking fights like this!"
Deep down she was just jealous, but admitting that would feel like losing. So Rosaria launched into a long list of every inconvenient thing about having big breasts, while Yuria took every hit with a smiling face and somehow made Rosaria eat every single counter—an absurd damage exchange where only one side was actually taking damage.
"...I think Rosaria's chest is cute too. I like it."
Lately, with the steady development work, it had grown a little. Especially once you stripped her, her nipples and areolas had gotten plump enough to call tempting. Still smaller than Orca's or Yuria's, sure—but Rosaria was nowhere near the "flat front and back" level people teased her about.
"See! Cali likes them too!"
"Come on, Senior. You really think Cali would say he hates them right here? And even if he likes them, bigger is still better. Has Cali ever covered you in cum using just your chest? Because he has with me."
"Shut up! You chest monster!"
Yuria gave her cowlick a deliberately annoying little sway while she needled Rosaria. Rosaria couldn't hold the rising anger anymore and closed in like she was about to devour her. The atmosphere was so charged it looked like hair-pulling was about to start, and I was fretting over how to break it up when—
"D-don't fight, everyone!"
Orca tried to stop Rosaria from the other side. The problem was that Orca had her arms wedged between her own massive breasts, putting the full power of those huge tits on perfect display. Watching Orca bounce those things while trying to calm her down only made Rosaria's face twist hotter—and then she completely lost it.

"What the hell is so great about these stupid tits anyway! Cali, what do you even like about them!"
Rosaria grabbed Yuria's breast with her left hand. No—calling it a grab wasn't quite right. She zeroed in on the slightly protruding tip of Yuria's nipple, pinched it between her fingers, and yanked it up. The whole picture had turned into her pinching and twisting that nipple.
Hey, even if you hate big chests, you can't just pinch her there like that—
"Haguuuh!? Nngh♡ Ooooh♡"
"Wh-what!?"
Yuria's nipples, already pushed to the absolute limit of sensitivity from everything I'd done to them earlier, took a sudden, brutal jolt of stimulation she never saw coming. All the pleasure she'd been holding back and concentrating exploded inside her at that single trigger.
And just like that, with Yuria suddenly climaxing in the middle of what had felt like a war, the entire atmosphere of the clubroom flipped in an instant.