Thread by @kiribaku511

Fuck it lets go, this is a purely self indulgent thread, enjoy or don't but know this is absolutely my shit 😘

-Muscle growth
-Size diff
- Maybe hyper muscle 👀💦
-Just, a fucking lot of pecs, I cant stress this enough
-Qrt's fuel me
-Body worship
-Probably some serious pec fucking and maybe ✨more✨
-Kiri has a praise kink and this will be important I assure you 😏

They were pro heroes, so of course getting quirked came with the job, part and parcel for it really. They'd had the slime quirk, the sense swap quirk, the mommy milkers quirk (which Kiri was a particular fan of he'll have you know), the macro quirk the micro quirk

This that and the other thing, at this point it was just something they dealt with. Yeah it was weird, a lot of times surprisingly fun.

So when Kiri came home after a shift of apparently being quirked well. It was surprising just how... normal he looked. Honestly if the villain hadn't been loudly and proudly screaming about their supposed victory over pro hero Red Riot he may not have even realized.

"Kaaaaatsuuuuuu I'm hungry" he pouted, flinging his limp (and fucking massive) body over his shorter husbands back and shoulders.

"Christ Ei give me some warning next time, I almost fucking ended up in the curry." He bapped him on the nose with the ladle he was stirring the fragrant mix of spices, sauces and secret ingredients with, leaving a small spot of curry on the tip of Kiri's nose.

"Tell me how that's tasting and then go be a good boy and set up the dining room, it's almost ready and my big strong husband clearly needs his food"

The genuine praise and affection went straight to Kiri's cock.
Oh that slight fucking bastard
Early on in their relationship Kiri had learnt that if he told his then boyfriend of his *ahem* interests, that they would be weaponized in pursuit of pleasure whenever he could swing it

And *clearly* he was feeling it tonight, because he was laying it on THICK.
He pulled at the collar of his shirt that was suddenly feeling extra snug and left him feeling hotter then usual.

With a quick swipe at his nose, a lick and a swift "Perfect spice as always babe" he dashed to the dining room, eager to please.
Eager to please, and eager to earn praise.

So he balked when he nearly threw one of their chairs through the wall, the heavyset thing light as a feather to him.
Daaaamn clearly his gym time recently had been paying off. Hell yeah Red, hell yeah Riot, he took a comical stance kissing his biceps as he flexed

And promptly exploded his sleeves as his husband walked in, plate of rice in one hand pot of curry in the other.

"Well damn Ei, dinner and a show,"
Kiri turned bright crimson, face matching his hair as he stood their sleeveless, arms still flexed in a double bicep pose.

", so how'd you do it, quirked shirt that explodes on trigger? Or has my big handsome man been working out so much just to get on my good side."

The rest of Kirishima's shirt exploded in a shower of fabric confetti.
How would he explain that no this was just one of his normal shirts and that really he hadn't even been trying that hard or used his quirk or anythi-
"Yes"
Or he could do that, he guessed...

"Well played stud, but go throw a shirt on so we can eat yeah, I got a feeling this is gonna be a fucking /delicious/ meal"
And Kiri had never felt more like the meal then at right that moment

He spun on his heel, dashing from the room before Kat could see his throbbing erection, his fabric incased thighs rubbing and shhk shhhk shhking as he went.

Bakugou gave a silent prayer to whatever god he had pleased as he watched his husbands round bubble butt bounce down the hall.

~~~

The outfit Kiri returned in was uhhh, less then family friendly, one might say. A stretchy shirt that left nothing to the imagination, skintight and almost too tight where the sleeves ended on his upper bicep, the slightest divot in the muscle where it pulled taut.

Pecs basically cling wrapped in fabric, stretched within an inch of its life across to mounds the redhead had the pleasure of calling pecs, wrinkling in the middle where it bridged the, apparently very, deep gap of his cleavage.

Each ab was like a cobblestone in the road of the days of yore, bulging up slightly with groves between them, perfectly placed for the world (and his husband) to see.

Luckily he was given more leeway in the pants department, though not by much.

His usually baggy gym pants were, well, not skin tight per se across his thighs, though if he flexed them, that was a completely different story. And they rubbed together now! That was new, right?

Hmm
Well where in he was given leeway across his thighs, his posterior on the otherhand...
He'd thought his ass was great before! He wouldn't necessarily call it a bubble but he was proud of it! Well now he had a bubble butt shelf and half.

Round, bountiful, jiggly when relaxed, rock hard when flexed (he tested, shut up, don't look at him like that).
Getting the pants past that had been quick the feat, and involved a number of heavier sounding jumps then normal.

His, apparently new?, bubble butt had another side effect on his pants however.
If he thought his butt made a statement, well now his dick held a rally.

Shrink wrapped in grey sweats in such a way that would make Satan himself proud. And these were his biggest stretchiest pair too! It wasn't his fault...

Okay maybe Katsuki choking on his spit was a *little* bit his fault. But his clothes had shrunk obviously!

A few heart slaps and rushed apologies later and the blonde was sitting their catching his breath back, glaring at his mysteriously stacked husband.

"If my obituary reads choked staring at his husbands fat fuckin tits I'm gonna haunt you for the rest of time I hope you know."

"Katsuuuuu I didn't mean too. All my clothes have shrunk or something and I think I'm having a reaction to something on my butt cause its all swollen or something and-"

He couldn't seriously be this dense right?

"Ei, sweetheart, babe, love of my life, would you kindly look down?"
Kiri stopped his rapid fire excuses, meeting his husbands eyes before nodding and looking down.

And stopping much sooner then he expected as his chin nestled into the deep pronounced cleavage gap he had acquired.

/Oh/

"Yes, oh. Did you get quirked today or something?"
"Yeah but it didn't do anything!"

Bakugou raised his hands, sitting one under both of his husbands bountiful pecs, palm almost filled with plush supple tiddy, and hefted them in time with his words.
"I. Beg. To. Differ."

"But it did nothing for so long!!"
Hmmm, that was true...
Baku began squishing Kiri's pecs as he thought, thumb dragging over the nub that had been rubbed rock hard from the fabric, let alone external stimulation.

Apparently an increase of size can lead to an increase of sensitivity because Kiri let out a deep unfiltered moan that was positively sinful.

And then the sound of stressed fabric began to grow

And so did Kiri

No prizes for the guess of what went first.
Bakugou now had a spectacular titty window to view his husbands positively massive pecs through now, and soon the rest followed suit.

Where as Kiri had arrived home looking like a total beefcake, now he put professional bodybuilders to shame

Dense masses of muscle all over, broad heavy PONDEROUS pecs just begging to be playing with. Arms thicker then a normal mans thigh, thighs larger then a skinny mans waist. A bountiful booty you could rest a tray on with room to spare. And a cobblestone brickwork

of abs, ever so slightly bowed outwards from the dense packing of muscle. Kiri had even grown wider, his lats beginning to fight for space with his arms, causing them to sit slightly outwards from his body.

And Bakugou was in absolute heaven

"/Fuck/"
Bakugou felt like the breath had been knocked out of him.
His husband, his beautiful amazing perfect husband had gotten quirked.

And he couldn't wait to test the limits of it.

Kiri allowing, of course.

"Fuck babe, you're so big, so handsome, so... much, I love it, I love you. Be a good boy for me and stay right there for a few minutes, I've got a call to make." His tone was deep, smooth and most importantly, full of lust.

The words felt like lightning zinging down his spine and he could've sworn he heard (and felt) an audibly bwooph as he packed on what looked like another 20lbs of muscle almost instantaneously.

Oh yes, he would be standing right here, waiting for his beautiful blond husband to come back and see he followed his command.
Yes, yes he would.

~~~
~In the other room~
~~~

"Bakugou?"
"Toyomitsu, is the quirk dangerous?"
"No..."

"No?"
"Well... the quirk and it's affects? No not dangerous, he'll be perfectly healthy regardless of size"
"Buuuuuuut?"

"While he might be physically healthy, if he gets past a certain point where he's vulnerable..."

The grin that spread across Bakugou's face was wide, feral and just a liiiiiittle bit evil
/Oh this was going to be SO much fun/

Fatgum spoke up in the extended silence of Bakugou's plotting
"Bakugou?"
"Don't worry Toyomitsu, he's peeeerfectly safe with me, say, how long will it last?"

"Depends, could be anywhere from a few hours to the whole day. The further you push the quirk the longer it lasts"

"Cool cool cool, we're taking a long weekend"
"Bakugou!-"
"Byeeeeeee~"

The blonde slammed the phone down a little harder then he needed to.
Well, they had been planning to do a bit of remodeling and furniture shopping anyway.