A Perfect Fit

Posted originally on the Archive of Our Own at http://archiveofourown.org/works/46315552.

Rating: Explicit
Archive Warning: Creator Chose Not To Use Archive Warnings
Category: M/M
Fandom: 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia
(Anime & Manga)
Relationships: Bakugou Katsuki/Midoriya Izuku, Kirishima Eijirou/Midoriya Izuku, Bakugou
Katsuki/Kirishima Eijirou, Bakugou Katsuki/Kirishima Eijirou/Midoriya Izuku
Characters: Midoriya Izuku, Bakugou Katsuki, Kirishima Eijirou
Additional Tags: Alternate Universe - No Quirks (My Hero Academia), Alternate Universe -
Modern Setting, Hybrids, Animal Traits, Voyeurism, Exhibitionism, Size
Difference, Watersports, Blink & You Miss It Piss Kink, Scent Marking,
Possessive Behavior, Biting, Scratching, Oral Sex, Anal Sex, Rimming,
Knotting, Sex Toys, Overstimulation, Kidnapping, Izuku's Okay With It
Though, Who Hasn't Dreamed of Being Lovingly Abducted by Big Animal
Boys, Mildly Dubious Consent, Enthusiastic Consent, Threesome - M/M/M,
Rabbit Hybrid Bakugou Katsuki, Wolf Hybrid Kirishima Eijirou, Human
Midoriya Izuku, Bottom Midoriya Izuku, Top Bakugou Katsuki, Bottom
Bakugou Katsuki, Top Kirishima Eijirou, NSFW Art, Embedded Images,
Wank and Tell, Additional Warnings In Author's Note, Do Not Repost to Other
Sites
Language: English
Collections: Bunnies! BNHA Zine
Stats: Published: 2023-04-07 Words: 6,279 Chapters: 1/1
 A Perfect Fit
by Aravis

Summary

Two hybrids at the sanctuary keep having 'encounters' that Izuku is apparently just lucky obsessed
enough to witness.

Notes

Written for Bunnies! BNHA.

Carmine graced my work with some absolutely delightful spot illustrations. [link to come!] (tysm
again Carmine, ( ˊᵕˋ )♡!!!)

If you prefer audio format, you can find a podfic version here!

---

Terms used: cock, tip, sheath, cunt, ass, knot, balls, hole, erection, dick, head, glans, groin, rim,
phallus, inside, slit

See the end of the work for more notes

Izuku used to hate waking up so early for work, but recently the morning slog has been distinctly
interesting. He’s worked at the hybrid sanctuary for a few years now and there’s always been an
intriguing mix of “tenants” in the sanctuary’s various habitats.

Izuku has heard plenty of rumours that the large stretch of private, protected land was bought by a
human who fell in love with a hybrid and wanted to avoid public censure for the taboo relationship,
but there’s no proof of that. He doesn’t exactly see many of the other keepers very often to ask
about it. That was an initial hurdle he always worried about in a new job: coworkers. And,
thankfully, he never had to do more than the occasional nod and hi-how-are-you in passing to
somewhat familiar faces. Even more thankfully, Izuku doesn’t have coworkers crowding into his
space and demanding gossip or insider info—because he would probably be fired if he told the
truth.

The truth is… well, it’s interesting, to say the least. The sanctuary may or may not have been
created to conceal the interspecies liaisons of its founder more than a century ago. And Izuku may
or may not be ah… engaging in said interspecies liaisons, himself.

---

“C’mon… I know you were in this quarter earlier…” Izuku mumbles, tapping his pen against the
tablet in his lap. The little golf-cart he’s sitting in has more duct-tape than solid plastic, but it’s a
sturdy thing with a tiny, clunky old heater he’s eternally grateful for on his morning rounds. It’s
spring, but it’s still chilly out here before the sun really hits the sky.

The tablet still shows a location ping from about twenty-six minutes ago. To allow for some privacy
and autonomy, the sanctuary refrains from constantly monitoring its “settled” occupants. The first
six months of habitation and introductions are all hands on board with behind-the-scenes data
tracking, but once the vet techs and zoologists higher up confirm that the hybrid in question has
denned (nested, roosted, etc) down in a “home territory”, they sign off on reduced monitoring.
Izuku is performing a visual check for one of their newer inhabitants, a feisty jack-rabbit hybrid
that had come in with multiple fractures and a distinct distrust of humans. “Katsuki” (or
“Kacchan”, as Izuku privately calls him) has healed and settled in remarkably well, but Izuku has
noticed something in the past month or so that has him a touch concerned. It’s nothing he wants to
bring up to the zoologist-in-residence just yet, but Izuku wouldn’t feel right if he didn’t go in
person to make sure things are, well, consensual?

Izuku chews his lip, ignoring the heat in his face as he checks the tablet once more. Only one more
minute until he gets a status ping from Katsuki’s tag. He needs to concentrate on doing his job, not
thinking about the trail cam footage he’s been watching (and re-watching) of Katsuki’s recent
encounters. Namely, his interactions with one of the more territorial hybrids in this part of the
sanctuary: a big, toothy maned wolf named “Eijirou”.

Okay, so technically Izuku doesn’t need to perform a visual check on Kacchan, but it’s usually
procedure to check on a newly mated pair, or at least take a quick peek at trail cams and monitoring
data to see if the receptive hybrid is doing alright in the aftermath. He’s seen the trail cam footage,
so he knows Kacchan has a hefty limp going, but he’s also seen the um… size of the cock he’s been
taking, so it’s pretty understandable that Kacchan would need a bit of time to get his legs back on
board. But still—since Kacchan came into the sanctuary with fractures, Izuku thought it would be
better to get in-person visual confirmation, even if it’s not technically necessary.

In any case, Izuku is fairly certain the encounters are consensual, but talking about consent for
hybrids opens a bit of a can of worms. They have more animalistic traits, more instinctive
behaviours that a human might not understand unless they’re a zoologist or a vet or a hybrid-
certified rescue. Meaning, a person off the street might see a big rabbit-man getting bitten and
shoved onto his face on a forest trail by a an even bigger wolf-man and fucked for several hours as
less enthusiastic sex and more uh… well. Human concepts aren't one to one, that’s all.

Kacchan certainly has the ability to fight off Eijirou—Izuku saw him bloody the wolf’s nose with a
hefty kick a month before they first had sex—but for some reason, he doesn’t really fight anymore.
Well… Izuku presses his face into the steering wheel, hiding his raging blush from no one. Does it
count as fighting if they’re running around with their dicks out, taking bites out of each other in
passing? Probably.

It usually goes something like this: Eijirou always sneaks up with the tip of his cock peeking out of
his sheath, panting quietly while he stalks Kacchan through the woods. Kacchan hops around doing
his usual glaring and marking of territory lines, but there’s a certain sway to his hips and a bulge to
his arms as if he’s flexing while he rakes his claws into the bark of the trees he passes. Eventually,
Eijirou breaks cover and lunges for Kacchan, sometimes managing to get an arm around his neck or
his waist to pull him to the ground where they snarl and snap and grapple for control. Kacchan has
tons of opportunities to leap away and sprint to any number of his hiding spots, and yet he
continues rolling around with Eijirou, darting his face in close to bite what bare skin he can find
amidst the wolf’s fluffy fur. Eijirou usually gets control of Kacchan pretty quickly, but he seems to
like letting Kacchan smack and bite and wrestle him. Finally, after some undetermined amount of
time, both hybrids are fully erect, dripping blood, covered in dirt, yowling and growling and
snapping in one another’s faces, and then Eijirou’s just in Kacchan.

Izuku cringed watching their first time on the trail cams. Kacchan doesn’t have a cunt, so it’s not
like Eijirou had anything to slick the way but pre-cum, so things seemed a bit tense until Kacchan
began to whine and shove his ass back against Eijirou’s hips. Now, every time they “get together”,
it seems like Kacchan relishes those first few minutes of burning stretch. Izuku’s tried out his own
version at home, riding thick toys too quickly, too soon, and with less lube than his sensible mind
insists he needs. It hurts—but Izuku can definitely see why Kacchan doesn’t run away, because
once it stops hurting, it aches, it burns, and it feels fucking amazing.

Eijirou’s pretty big, but there isn’t much to go off of since he spends most of his time erect and out
of his sheath stuffed inside of Kacchan. From what he’s seen when they’ve switched positions in a
scrambling, hissing flail of limbs—when Eijirou slipped out and Kacchan let out the most sinful
whines until the cock was given back—Izuku estimates about nine to ten inches in length with a
knot that could be around eight inches in circumference. But again, Izuku would have to be there in
person to make any kind of real guesswork on the size of his hybrids.

In the last few encounters, Eijirou has started holding onto Kacchan’s hips and shoulders less and
touching his cock more. Hares don’t have knots, and Kacchan’s balls are about a quarter the size of
Eijirou’s. Mix all that together with the difference in the two hybrids’ sizes and it meant that Izuku
hasn’t been able to get a good estimate on Kacchan’s cock either, because Eijirou’s fist swallows it
up entirely. It’s frustrating, honestly. Izuku is trying to do his job, and these two are making it
difficult to monitor their mating practices!!

At least that’s the story he’ll give if anyone asks why he went into the field if anything um…
happens. Not that it will!! But Izuku came prepared, in any case. There’s the usual field-kit of some
compressed air deterrent spray, loud bells, a whistle, a baton to maintain distance, radios, first-aid
kit, et cetera. But Izuku likes to prepare more thoroughly—hence the, um, plug in his ass. Not that
Izuku is intending to get fucked by hybrids under his care!! But… well, he’d like to be.
Izuku squirms, finally sitting back upright to do his work. He taps the screen to wake the program
back up, scrutinizing the data pings. The log shows the most recent one three minutes ago now at…
oh. Izuku chews his lip with increased vigour as he carefully sets the tablet down and grips the
wheel to glance over his shoulder. Two pairs of red eyes stare back at him around the rear wheel-
wells.

Izuku blinks, a delightful little shiver crawling down between his legs. Kacchan’s nose quivers,
brows lowered in his signature glare. Eijirou is crouched above him, one clawed hand braced
against the side of the golf cart. His face is lifted, mouth slightly open as he sniffs the air. Behind
him, disappearing and reappearing past the edge of the cart, Eijirou’s tail wags furiously.

“U-um…” Izuku tries to pitch his voice low, keeping the volume subtle for their first real
encounter. “Hello, you two.” Kacchan huffs, eyes narrowing as his nostrils flare. One curled hand
presses into the grass against the wheel, shifting minutely closer. Eijirou’s body shakes as his tail
wags harder, a giddy whine pouring past his teeth.

“Sorry for snooping—” In more ways than one… “—I just wanted to make sure you were um… g-
getting along okay, since you started, uh, um, being… together.” Izuku fidgets with the hem of his
shirt as the two hybrids stare back at him. Eijirou’s face splits in a wolfy grin as he looks proudly
down at Katsuki. Kacchan’s eyes roll—such a human gesture—and he sniffs primly before stepping
around the end of the golf cart and approaching Izuku. Eijirou follows after him, walking on his
furry hind legs. Izuku doesn’t miss the long, heavy jut of wolf-cock slapping against his belly and
thighs as he moves.

“Oh—uh, okay, you c-can say hello if you like, I’m IZU—ku,” he yelps, freezing in place as
Kacchan sticks his nose into Izuku’s neck. The tip is a little cold, but the tongue that reaches out to
prod his skin is definitely not.

What the grainy trail cams didn’t capture was the fine whiskers coating Kacchan’s face and the
light, almost transparent coat of downy fur fluttering beneath his chin before the ruff of his throat
and chest fur puff out into a proud mane. Kacchan’s hands are big, his fingers nearly wrapping
around Izuku’s thigh. As he leans into the golf cart to examine Izuku, his long ears flatten slightly
to avoid scraping the roof.

Behind him, Eijirou is equally impressive. A little more furry, with a strip of darker, longer fur
standing out along his spine and down to his voluminous tail. The claws on his hands are longer
than Kacchan’s. And his, uh… his cock, it’s—well, Izuku’s estimates were just a touch off. Say…
by three or so inches in length… probably at least another two inches in girth.

How does Kacchan make that fit? … Can I fit that?

After a few seconds the wolf prods at Katsuki’s back with his knuckles, claws tucked toward his
palm. If Izuku were less focused on his spit-slick neck (and his aching dick and hole), he might’ve
noted the practised gesture as evidence of the cohesiveness of their pairing. As it stands, he doesn’t
really have the mental capacity to do more than mewl helplessly as Kacchan aims a half-hearted,
backward kick at Eijirou before grumbling and ducking out from under the golf cart to let the wolf
have a turn.

Izuku shrinks back in his seat as Eijirou fills the side of the cart. He’s a massive hybrid, full of
healthy muscle and a nice layer of fat that gives him a stout, strong look. The wolf preens as Izuku
looks at him, tossing a sly look over his shoulder at his mate. Katsuki snorts through his nose, such
a human sound it makes Izuku can’t help laughing aloud.

Eijirou’s eyes lock on Izuku at the noise, dark red and dilated with hunger or arousal, Izuku isn’t
sure which. He’s both pleased and intimidated to find that expression turned his way, because while
he’s been fantasizing about these two hybrids for weeks, he’s also now aware of how unprepared he
is for making those fantasies a reality. The plug in his ass is pathetic compared to the big hand that
snakes out to press him against the seat. Eijirou’s claws lightly trace his chest before tucking under
the hem of his shirt and giving it a swift, upward yank.

“He—pfft—hey!!” Izuku sputters, flailing as best he can with the shirt trapping his arms up beside
his head.

The light through the shirt dims as a large mass fills the space in front of him. Heavy sniffs and
low, hungry growls make Izuku’s insides melt and twist like putty. Sharp hands grip and pull at
him, levering him out of his seat and tucking him tight against a warm, furry side. Another set of
hands stroke down his back, tracing the pattern of freckles that vanishes into the back of his pants
—the waist of which is thoroughly explored, the tips of claws dipping beneath with obvious
interest.

Grass crackles beneath two sets of paws. Izuku manages to tuck his chin to look past the bottom
hem of his shirt, where broad, blond-furred feet stand between narrow red paws. Izuku can also feel
a distinctly hard heat against his ass, growing more evident as his legs are rearranged around the
muscular waist in front of him. A high, pleading whine sounds as the body beneath him shudders,
hips jerking. The head of a truly impressive cock grinds against the (thus far) impenetrable seat of
his pants.

“Where.”

Oh. He knows some hybrids can talk, but Izuku hasn’t heard Kacchan or Eijirou talking. Or at least,
the trail cams don’t have audio and the hybrids’ faces are never in view when they’re um…
engaged, so Izuku never knew if they were capable. But apparently they can talk, because the red-
furred body he’s locked against heaves, muscles flexing before an equally deep, growling voice
replies:

“Den.”

A muffled yip escapes Izuku; he can’t tell if it’s in protest or excitement. Neither hybrid pays him
much attention, however, and before he can puzzle it out the wind begins rushing past as Eijirou
and Kacchan race away from the golf cart, carrying him off into the woods.

---

The monotony of being carried around gets old fast, especially with nothing to pass the time.
Shadows began passing more frequently overhead after the first hour or so, which Izuku takes to
mean they’ve gone deeper into the forest on the sanctuary lands.

His arms, still pressed up over his head with the shirt binding him in place, are way past cramped
and into aching numbness by the time Eijirou and Kacchan slow to a walk. They’re only slightly
out of breath, which is ridiculous—especially since they handed him off between one another a few
times without much effort as they climbed up several rocky surfaces or crossed a few little cliffs.

The light brightens before dimming once more, the warmth of the sun fading just a little as they
finally come to a stop beneath some trees. Izuku sighs, shaking his sweat-heavy curls from his eyes.
He’s been planning to either struggle to get down or verbally insist he be put down for a while—
now he just needs to go through with it. Izuku is still gathering courage when the situation outside
the stifling world of his shirt changes with a deep, hungry voice.
“Want,” Eijirou growls, stroking a clawed hand over his back before dipping lower.

Izuku squawks into the shirt and the fur plastered against his sweaty skin as his ass is thoroughly
groped. He’s still bound up inside his stupid uniform polo shirt, and there’s no telling when he
might be let down to sort things out. From what he can tell, given the increased light and
temperature, it’s probably either noon or just after, and he’s been carried a long way from his golf
cart full of supplies and methods of contacting other humans. It’s probably in his best interest to
just let his two hybrids take care of him—whatever that might mean for him.

Hopefully something good. Izuku squirms, hoping Eijirou can’t feel the pitiful human erection past
the barrier of his pants.

A tongue clicks beside them. “Small.” Kacchan says. “Stupid wolf too big.”

“Am big,” Eijirou agrees, puffing his chest up until Izuku prods it back down with little bounces of
his forehead.

“Hello? Can you let me down? Um… please?” He put off thinking about other needs while they
were running, but now that they’ve stopped—and with Eijirou stroking along the backs of his
thighs and drawing his attention south—Izuku is struck by just how much he needs to pee.

Both hybrids freeze in place, low, uncertain growls and tooth-grinding filling the air before a small,
nonverbal conference occurs over Izuku’s head. He can tell they’re “talking” because of the short
jerks of Eijirou’s arms and the sub-vocal rumbles buzzing through his skin. Eventually, some
consensus is reached and Izuku is allowed to slide down to his shaky feet.

Izuku struggles with his shirt until it’s suddenly ripped off and tossed carelessly against a tree trunk
a few yards away. Before he can try to figure out where they’ve ended up, Kacchan steps in front of
him. The hybrid dips down so their faces are level, baring his teeth briefly before cocking his head,
red eyes narrowing intently. Izuku should feel threatened by the display, but he’s already
established just how screwed up his moral compass has become.

“No run.” A long, broad, furry rabbit-foot stamps the grass in a warning thump. “No. Run.” Eijirou
echoes the sentiment with a grunt.
Izuku swallows, palms stretching out in what he hopes is a calming, supplicating manner. “I won’t
run.” Kidnapped by hybrids. This is fine.

Izuku sidles toward the closest tree, intending to hide behind it to do his business. Both hybrids
watch him intently, ears twitching, tails bobbing or wagging respectively. When he begins to duck
behind his selected tree, twin growls fill the air and a huge, red-furred hand seals around Izuku’s
arm.

“No,” Eijirou insists, puffing air through his nose in emphasis. Kacchan circles them, stepping
behind Izuku to cut off any escape. “Stay.”

Izuku squeezes his muscles, doing his best not to piss his pants. Gravity’s really started working on
him now; he needs to go bad. “Not running,” he babbles, waving his hands. He points at the tree.
“Need to go, um, relieve myself?”

Both hybrids give him unimpressed looks. Kacchan folds his arms across his chest, briefly
distracting Izuku from his pee-mission with the attractive bulge of muscle. Uninvited, a sudden
surge of liquid heat sears through his cock, only just stopped with a hiss and hard squeeze of
muscle.

“Please, seriously—Ihavetopee,” Izuku yelps, hiding his face in his hands.

A warm hand curls around his side, pulling him forward. Eijirou snuffles at his hair as Katsuki tugs
at Izuku’s wrists. The urge is almost unbearable now; his legs are shaking, rustling the grass at his
feet. “Piss?” Eijirou ventures, tipping his head in such a puppyish way Izuku would laugh if he
weren’t seconds from wetting his pants.

“Yes, I have to. So please—I’m just going behind this tree, I promise I won’t run.” Izuku fumbles at
the button on his pants, cringing at the pressure. He turns toward the tree again, intending to shuffle
around and out of sight.

Kacchan grips his shoulder, grumbling and stamping his foot once more. “Here. Tree. Go.”
Eijirou nods helpfully, gripping a fold of Izuku’s pants between his thumb and forefinger. Izuku
yelps as the zipper gives and his pants jerk down, briefly stuck on the curve of his ass. The swell of
his dick isn’t helping things either—the pressure of everything is quickly becoming agonizing.

Izuku burns, mortified that he’s about to pee in front of other people. Part of his brain, the
analytical side that desperately wants to detach and help him through it all, reminds him that
they’re just hybrids. That doesn’t make it any better because he’s been getting off to these hybrids
for weeks. It isn’t just taking a leak with animals in the woods, it’s pulling his cock out and pissing
while the furry guys he’s interested in take front-row seats. But it’s too late to think of all of that
right now. Shame can wait: Izuku needs to go.

Between the helpful claws and his own wriggling, they get his pants low enough that Izuku can
fumble for the slit in his underwear and tug himself free, stomach cramping as he finally relieves
himself. He does not have a piss kink. He doesn’t. But the interested sniffs and keen eyes locked on
his cock are quickly proving him a liar. The sudden surge of arousal cuts him off mid-stream,
slowing to a few gushes that leave the head of his cock wet and warm.

Izuku doesn’t get a chance to put himself away or shake off. Eijirou makes a hungry sound and
swipes clawed fingers over his glans, then sticks them into his mouth to taste. Izuku gawks at him,
knees trembling as his cock twitches, blood rushing into his groin. Kacchan grumbles and stalks
closer, caging him in against the tree. One hand holds his hips still while the other swipes for his
cock, pumping with unfairly practised ease.

“Ohhh my god,” Izuku groans, flailing until his fingers catch on a puff of blond fur. Kacchan
grumbles louder at the tug on his ruff, but he doesn’t care enough to let go of his prize.

Beside them, Eijirou braces a hand on the tree and trails his claws down Izuku’s back. He ignores
Katsuki’s challenging grunt when their hands battle for space on Izuku’s hips, but eventually the
two of them decide his remaining clothes are the real problem. Izuku steps out of his pants and
underwear, giving up the last bit of control he has. Kacchan’s fingers are callused but amazing on
his cock, stroking in a way that’s both under and overstimulating. Eijirou rumbles, stepping closer
until his cock butts up against Izuku’s hip, leaving wet streaks across his thighs and ribs.

Izuku leans forward, bracing his free hand on the tree. Both hybrids crowd around him, nipping and
grumbling at one another and groping him with growing eagerness. Izuku moans desperately as a
sharp claw clinks against the hard base of his plug—and everything goes still.
“What?” Eijirou taps it again, claws scrabbling around the base, trying their best to get a good grip.
“What,” he demands, stuffing his nose against Izuku’s neck.

Kacchan smacks Eijirou’s hand away, using his shorter claws to better grip the rounded edges of
the plug’s base. Izuku squawks and shudders as Kacchan begins tugging it free with a long, wet
sound. Both hybrids make hungry, approving sounds, and before Izuku can decide how best to
approach things, Eijirou drops to his knees, grips Izuku’s hips, and stuffs his tongue in deep.

Izuku wails, hips thrusting between the hand on his cock and the rough tongue in his hole,
relentlessly teasing and testing his limits. Eijirou’s breath puffs hotly over his ass and thighs,
hungry growls and eager whines rising with each shudder and clench around his tongue. Kacchan
grips Izuku’s chin, tugging his face up to stare at the teary, flushed, splotchy mess they’ve made of
him.

“Good,” Kacchan purrs, leaning down to nuzzle Izuku. It feels more like being headbutted, but
Izuku appreciates the affection for what it is. “Open?”

Eijirou tugs free with a ridiculous splatter of drool, panting against Izuku’s ass. He whines sadly,
licking Izuku’s rim until it quivers, too tired to close up around the space inside. “Tight.”

Kacchan grumbles, releasing Izuku’s chin to pat Eijirou’s head. It’s so cute and familiar it makes
Izuku’s heart ache—as well as it can with how fast and heavy it’s pounding. He’s so close to
cumming and there’s nothing inside of him, it’s unbearable.

“P-please,” he begs, face burning as he pushes his hips back. “Empty.” It’s probably a bad sign that
he’s already descended into monosyllables alongside them. But who said sex needed to be a
verbose activity, anyway?

Eijirou licks into Izuku, teasing his rim with soft nibbles before nipping the curve of his ass. “No
knot. Too small. Tight,” he enthuses, thrusting his tongue back in until Izuku’s eyes roll back, knees
close to buckling.

“Hmm. Me,” Kacchan decides, shoving at Eijirou’s head. “You have me. I have him.” Izuku nods
fervently. This is a good solution for him, absolutely. Hopefully Kacchan will fit in him…
The three of them settle at the base of the tree. Eijirou nuzzles Izuku, delighting in the bare, soft
throat presented to him as Kacchan shuffles into place, opening Izuku’s legs around his waist.
Izuku strokes Eijirou’s fur, smiling as the wolf whines and shivers in delight at a gentle ear
massage. A sharp nip draws his attention back to Kacchan, eagerly waiting with his own cock now
hard in hand.

“Oh…” Izuku stares, licking his lips. It’s big too. It… it probably won’t fit, but he really wants to
try anyway.

Kacchan nudges the head against Izuku’s hole, mouth twisted in a scowl. A few petty thrusts leave
Izuku cringing, biting his lips to hold back pained sounds. Kacchan has the first bit of the head in,
but the rim of the glans is broad, bigger than a human’s, and Izuku’s hole seems determined to keep
it out. If it were a more classic rabbit-shaped phallus, there wouldn’t be an issue getting such a
streamlined shape inside of him, but this…

Eijirou snuffles against Izuku’s shoulder, rubbing their cheeks together. “Tight,” he mourns, petting
Izuku’s belly before stroking a thumb over the short jut of his cock.

Kacchan tries another few thrusts, but in the end, the hybrid doesn’t seem keen to continue if Izuku
won’t enjoy it. It’s both frustrating and endearing that a wild hybrid would have such a level of
self-control. Izuku wants to be fucked, but here are these two wild beings, refusing to do so because
his ass is just too tight.

“Thighs?”

Kacchan’s ears flick. “He wants inside. Can tell—empty, no cum.”

Izuku flushes as they discuss him like any dominant partners would. Oh, your sub can’t get off
without something stuffed in his hole? Such a shame.

Kacchan lifts the forgotten plug, brushing it clean on the fur of his thigh before licking it and
unceremoniously stuffing it back into Izuku. He moans, arching in Eijirou’s grip as Kacchan
pauses, a keen, sly look appearing on his face. The hybrid grips the plug and begins fucking Izuku
with it, slow thrusts aimed ridiculously well, teasing until his hole shivers and strains around the
largest part, desperate to keep it in.
“This,” Kacchan declares, shuffling onto his elbows before Izuku. “Come. Fuck me, I take care of
him.”

Izuku flops onto his back as Eijirou wriggles out from beneath him, giving him a last tender stroke
before romping around behind Katsuki. Kacchan rumbles and tugs Izuku closer, deftly rearranging
him onto his belly. “Up,” Kacchan declares, scratching Izuku’s thighs with his demanding grip.

Izuku groans, arching his back and spreading his knees wide to give the hybrid as much access as
possible. Kacchan noses at his balls before flicking his tongue out to taste Izuku’s cock, teasing the
head with little kitten-licks before leaving him dripping and neglected. Kacchan lets out a snarl,
then a hoarse groan, lurching away from Izuku’s ass. He cranes around to look at what’s going on
behind him, eyes wide at the violent, erotic display.

It becomes immediately obvious how much care they were using with him. Eijirou shoves between
Katsuki’s shoulders and hikes his hips up, slapping his cock onto the hare’s tail before sliding it
down and humping against the furl of his ass. A short squabble ensues, with Kacchan demanding to
be licked before being mounted, and Eijirou whining about being ready now. It’s a little funny,
aside from the bared teeth and raking claws. For hybrids, these hybrids in particular, Izuku knows
it’s their standard dance around sex and dominance.

Kacchan likes to be teased, worshipped, and begged for sex. Eijirou likes to claim, to mount and
own and fuck. Well, they both like to fuck, but Eijirou seems a bit wilder than Kacchan. It’s
probably just the size of his teeth and claws in comparison to the hare’s, and Izuku’s own personal
preconceptions of predators versus prey.

In any case, Kacchan grips his thighs while Eijirou licks him open, then gnaws on Izuku’s ass while
Eijirou begins fucking him with hard, wet slaps of his hips. Every jolt of the wolf’s hips drives
Kacchan’s claws and tongue and teeth into Izuku, teasing and tormenting him with what he could
be having.

Next time, Izuku tells himself, ripping the grass out in fistfuls as Kacchan gets a grip on the plug’s
base with his teeth. The stretch is easier after Eijirou licked him, the plug slicking in and out with
hardly any friction save for the desperate squeeze of muscles in pursuit of orgasm.

In a truly desperate moment of need, Izuku reaches back and stuffs a finger into himself as the plug
begins tugging out, gritting his teeth as Kacchan’s face gets pushed closer with Eijirou’s next thrust,
driving the plug back home. Kacchan groans around his mouthful, claws raking down Izuku’s sides
and thighs in stinging, claiming lines. Eijirou snarls above them, fucking Katsuki as hard as he can.
“Good,” he enthuses, snarling again as Kacchan bucks against him.

They all forget speech as the careful threeway devolves into a wet, panting mess. Izuku cums first,
spraying the grass beneath him with a cry. Kacchan dips down and licks his cock, teasing the post-
orgasm flesh until Izuku cries, needy and insensate with pleasure. Kacchan suckles Izuku’s cock as
Eijirou continues pounding him, humming a nonsense, growling tune as the wolf’s stamina drives
him mad. Izuku can hardly be blamed for losing control of himself with such constant
overstimulation; Kacchan certainly doesn’t seem to mind having something different to drink
down.

Eijirou’s efforts finally draw Kacchan’s mouth away, filling the hare’s throat with hoarse cries and
snarls. Dazed, Izuku continues stroking his inside, lost in the simple comfort of sensation as the two
hybrids above him moan and strain towards orgasm. Izuku gets another finger in before his hole
refuses to stretch anymore—but it’s enough. Enough that when Kacchan’s stuffed full of a knot and
unable to move, he gets to tease his hybrids with tantalizing glimpses of his stretched hole, slowly,
carefully sliding onto Kacchan’s cock. He can’t take Kacchan all the way, not yet, but it’s a start.

They have as much time as they need to fit together in all the ways they want.

---

Izuku taps in his confirmation of the data ping, biting his lip as he slips onto the next bulb of his
toy. Kacchan and Eijirou are on their way, the most recent pings showing them only a few
kilometres out. It’s good timing; Izuku has a little longer to get the last knot inside to prove that he
can take part in Eijirou’s rut.

It’s been an amazing few months since that first foray into the woods. He’d spent several days
eating food brought to him by his new mates, bathing in streams, and being play-mounted and
teased in a dozen different ways. They didn’t have a large amount of words, but Izuku gathered
enough to know that his “sneaky” attentions were very much returned—and that Kacchan and
Eijirou had put on a few performances just for him. Izuku had a fun time explaining his
unanswered messages and abandoned golf cart when Kacchan and Eijirou finally brought him
back, but things smoothed over pretty quickly, all things considered. The worst part was pretending
he wasn’t going to go gallivanting off into the woods again at the first sign of his “favourite
hybrids”. Ah well, what they don’t know…

He’s been able to take Kacchan fully for about a month and a half now, and they’ve been practising
getting him on Eijirou ever since. He’s such a good pup, shivering and holding still even when
Izuku can feel how badly he wants to just bury himself knot-deep, no matter the consequences.
Kacchan’s been taking the brunt of Eijirou’s needs in the meantime; he can’t wait to see the looks
on their faces when he turns around to show them how ready he is to be theirs. Both of theirs.

Izuku squeezes on the toy, rocking another few bulbs up before slowly pressing himself down,
down, down… ahhhh, fuck!! There. The last knot, only a little smaller than Eijirou himself, fully
buried inside his ass. And not a second too soon… The distant breaking of grass and low panting
announces the arrival of his playmates.

Izuku smiles and sets the tablet into the glove box, then swings his backpack on and carefully steps
down onto the grass. He needs the supplies this time, since he’s planning on spending the entire rut
with Eijirou and Kacchan (a period lasting up to two weeks, in particularly virile hybrids), so the
backpack is a must. Lots of lube, a bunch of toys (some hybrid specific ones Izuku is dying to try
out), and some combs and brushes so he can dote on his mates as much as he wants.

Izuku looks funny, naked save for his shoes and the bag, but Eijirou and Kacchan like having
access to him—and Izuku’s the only one watching the trail cams in their territory. If another human
comes across footage of their coworker being bred like an eager bitch, that’s their own problem.
Izuku’s become rather fond of being nude. Makes everything so much easier. Who wouldn’t want
to walk around bare and proud, knowing you’d have someone racing to get inside you the instant
you bent over?

Twin growls, and a hard, impatient stomp of a familiar foot, drift from the nearby meadow. Red
eyes stare at him, drinking in every inch of bare skin—and the slight bulge in his belly, shifting
with every step he takes. “I’m coming, don’t worry…” Izuku calls, smiling as he marches
awkwardly toward his mates, cock twitching at the hungry looks on their furry faces.

Eijirou emerges from the grass, loping on all fours toward him. Kacchan hops past, kicking a foot
back with unerring accuracy. Izuku laughs, wincing as his stomach tightens around the toy buried
oh so deep… Kacchan tips his head, stretching out a claw to trace the obvious curve in Izuku’s
belly. Izuku smiles, standing on tip-toes to steal a kiss. Kacchan and Eijirou are very good at
kissing now, Izuku spent a long time teaching them, of course. Eijirou whines until Kacchan
finishes licking Izuku’s neck and chest, allowing him to turn and offer a similar greeting.
Two sets of hands grope across his body, teasing the swell of his stomach and the tight, lube-slick
curve of his ass. Eijirou pauses, a shiver wracking his massive frame. Izuku smiles up at him,
sliding a hand down to tease the wolf’s sheath. “Ready?” Eijirou asks, the hint of a whine straining
through his gruff demeanour as his cock slides out onto Izuku’s palm.

Izuku purrs—a skill he picked up from his mates—and teases the slit of Eijirou’s cock with his
thumb. “Mhmmm… I’m nice and stretched. I want this in me at the den.”

Kacchan grumbles behind them, but he drapes himself over Izuku’s back to watch his fingers dance
over Eijirou’s cock. The novelty of clawless hands able to tease all manner of sensitive parts has
never grown old for his mates. Kacchan explores the base of the toy between Izuku’s legs, but he
knows better than to remove it so close to the rut.

Finally, Eijirou shakes himself from his stupor, dragging Izuku up into his arms and turning to
march away toward the woods. Kacchan huffs, folding his arms over his chest. He’s so cute when
he’s grouchy. “Kacchannnn,” Izuku calls, waving over Eijirou’s shoulder to the sulking hare. “I’ve
been practising my deepthroating for you!!” That does it.

The hybrids eagerly race towards their den with Izuku in their arms, whispering promises for the
coming weeks. And if they have to stop part way to the den to relieve some tension, well… Izuku is
a dedicated keeper. He’s always ready to make his hybrids happy.

---
---
End Notes

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