Upon the winding dirt roads of the Mustufa forest, traveled an adventurer. His name was Izuku Midoriya, he was a humble warrior from a small village several miles south of this forest, and he traveled this road to reach the kingdom, with only one goal in mind: To train, form a party, and finally slay the Demon King himself.
He knew he was dreaming big, and most of the folks back home said he'd be back in a week or a month at most… Or dead, but that was actually a bit more pleasant than the thought of returning: At least it meant he died trying.
Izuku packed light with a satchel of necessities, his sword on his hip, but not much else… Fine for travel, but very much lacking for an intense fight or stepping to the Demon King. He had no treasures, no masterfully-crafted weapons, he didn't even have potions!
While that thought did make him slump slightly, he quickly picked himself back up again. "Oh well… It's just the beginning of my journey, what would be the point if I started out at Demon King level from the get-go?" He asked himself, soon finding himself in a swamp, with the road barely being two feet wide across, and the sides led directly into the dark, murky and filthy water that also probably hid swamp creatures beneath.
Clenching his sword, he marched on, looking around cautiously before he found himself fixed on something strange to the side: It was far away enough and through enough of the thicket to be mostly concealed, but it looked like a small hut with a dim light burning slightly, like looking into a tunnel and seeing a dim light at the very end.
He looked down slightly and saw what he assumed to be a path: Flat, square-shaped stones above the water, each one a few feet apart, as if one was meant to really stretch their legs to reach, or if they were especially short, hop between them.
He looked to the side across the path he was taking and really thought about it. He was on the road for a couple of days now, so he already had quite a few of the things he had packed to eat, and since he nor his mother were very wealthy, he didn't have many coins to spend. He planned to make some money off quests with his party, but on the other hand… If he could run errands or favors for whoever was there, he could get some more to eat, or perhaps coins to spend.
With a small breath, he began to walk on the stone-laden path deeper and deeper into the swamp, the thicket getting darker and denser, almost enveloping him in darkness and he immediately noticed something peculiar: The house itself was a giant, red mushroom with red spots, and what's more- Spores big and small, of every kind and color, surrounded the immediate area, poking from the water, covering stones like moss, on the surrounding trees' bark, even off the front door.
However, there was a light inside, so he could only hope. Treading the last few stones, he finally came before the door. It was then that he noticed that the door was curiously small, not a gnome or small critter kind of small, but more like a dwarven height- which made sense given that it was fairly wide as well. (Granted, Izuku knew he was a little taller than average as it was, so it may have just been a manner of perspective) Nevertheless, he gently knocked on the door.
There was a sudden tumble inside and a small voice talking to themselves with surprise. "E-Er, a moment!" She called, quickly followed by the sounds of clattering objects like she was scurrying to tidy up. Honestly, it made him feel guilty, he would have hated to interrupt anything urgent for this stranger.
Suddenly, the door sprang open to cast Izuku in light and see the… Admittedly odd stranger. She didn't appear dwarven, but she was very short, a solid foot and a half under him, with long, straight brown that cast down her face right down to her nose, but parted just enough over her right eye to see. But more than that was what she was wearing: A one-piece dress designed like a red mushroom with white spots just like her house, a wide-brimmed hat like a witch's with the same design, and a simple brown belt with several sachets and deep pockets.
"O-Oh my…" She gasped, looking up at him with her lips slightly parted, as if in astonishment. "Wh-Why, hello, Sir Knight~... How may I help you? Would you care to come in?" She asked, suddenly moving aside to usher him in. Her voice was soft, and admittedly just as cute as she was.
Keeping polite, he bowed his head and entered through the small door as the girl closed it behind him. "Thank you very much, Ma'am. But I'm no knight, I'm a simple adventurer." He explained with another bow, "My name is Izuku Midoriya, and it's an honor to be a guest in your home, Ma'am."
The girl giggled and bowed back, "I'm Kinoko Kimori, Mr. Midoriya. It's an honor to have you~... I hope you'll forgive me, but you're very convincing as one."
Izuku tilted his head slightly. "O-Oh, please call me Izuku, Miss Kinoko. And I'm sorry, but I wasn't trying to appear as one, is it my sword? Neither that nor my outfit is very befitting of a knight's." He said, explaining his confusion as he looked around for a moment.
It was a very warm area, the inside of the mushroom looked surprisingly wooden and sturdy, fitted with a small kitchen area and dining room on one end, and the other half was lined with bookshelves, an empty cauldron, and a mat before it, several books were stacked on top of each other on a table, along with a small bowl and empty vials. Across the room was a staircase, as well.
"Well… When I imagine knights, I have a fairly clear image of them: To be quite large as you are," She started, looking over his arms and legs that pressed cozily against the sleeves, almost outright bulging with muscle, and a slightly broad chest that suggests that Izuku could definitely handle more than his thin-ish frame suggested at first glance. "And to be as handsome as you, as well~"
Izuku blushed deeply, looking away slightly with embarrassment. "I-I… Thank you, Miss K-Kinoko." He said as she giggled from his sudden display of bashfulness.
"You're very welcome, but you may call me Kimori, Izuku~... So, what brings an adventurer such as you to my cozy, shroomtastic abode?"
'Shroom… Tastic?' He asked himself, before suddenly speaking again. "I come looking for work. If you have a minute, I can tell you everything, Kimori." He suggested, watching the girl light up with glee as she quickly sat at her table with its only two chairs.
"Oh please do, Izuku~... I'd like to know everything about you, if you don't mind, that is~" She offered, gesturing to the seat across from her before he politely sat down as well. "So, you may go on."
Then, Izuku recalled his story to her: From being a farm boy in the town to the east, growing up with aspirations for adventure, and eventually setting off now that he was of age, but because of his upbringing, he didn't exactly have a good start. "... So, I decided I'm taking any odd job I can. I'll accept anything in return: Coins, food, old camping or traveling gear you don't need-"
"What about potions?" She asked with a small smirk.
"Oh, so you are a witch." Izuku blurted out before he could stop himself, before suddenly shaking his head. "Sorry… I just thought it may be rude to outright ask."
Kimori giggled again. "No worries… After all, a woman living alone in a swamp, residing inside a giant mushroom? My cauldron there? I'm surprised you didn't ask at all."
Izuku chuckled slightly, shaking his head slightly with embarrassment. "I've already shown up at your home uninvited, I didn't want to be rude by sticking my nose where it didn't belong." He explained, just as Kimori clicked her tongue and sprang up from her seat.
"Oh no no no, Izuku, you're always welcome here~..." She promised with a grin, subtly licking her bottom lip as Izuku blushed.
"Thank you. A-Anyway… If you have any healing potions to pay me in, I think I'd be up for just about anything!" He offered with a small laugh, as her grin grew only wider.
"I see… I'm afraid I've been a rude host, would you like any tea? Then, we can talk about … This job I have for you~" She offered with a small coo, going to her pantry and getting onto her toes to reach for two neat-looking porcelain cups.
"Yes, actually. Thank you… V-Very…" Suddenly, Izuku began to trail off as her skirt hiked up higher and higher, showing off the curves of her ass, and that her skirt probably wasn't as frilly as he thought, but rather, just a massive set of child-bearing hips and a fat butt that made it look that way. "M-Much, Kimori."
She smirked without even looking back, before pulling the cups down. She reached into her satchel and put three seeds on the counter, then dosed them all in a green liquid she pulled from a vial from one of her many, many belt compartments. She turned to him with a wide grin, "Watch this!" She implored, as the mushrooms suddenly sprouted.
One was a dark blue that didn't seem… Solid, like a jellyfish that he could see all the way through. And the last two were bright red with a slightly green tip of their caps. She took the first by the cap and held it over a kettle before crushing it in her palm, draining the now light-blue liquid into the kettle. She then hung it over the unlit fireplace, then struck the two reds together, setting them on fire before tossing them into the firewood, instantly setting it alight.
Kimori then spun around to Izuku, clearly very pleased with herself. "My mushrooms are my life's work, you know. More than that, being able to breed and enchant new ones into existence would probably make me one of the best Biomancers in the field!" She declared, laughing heartily.
Izuku couldn't help but smile as well from her cheer, as well as the refreshing wave of warmth basking over him. "I can tell… So, I'm assuming my job has something to do with that."
Kimori stopped laughing to smile at him again, in the raunchy, exciting way he found her fond of doing now. "Exactly right, Izuku~... I need your help with a very particular recipe of mine." She explained, walking over to a drawer with a very obvious swing in her hips as she extracted tea leaves and tossed them into the kettle. "Or rather… I need your seed~"
"M-My what!?" He asked, taken aback as the witch smirked and bent over to look into the fire and kettle, pointing her ass straight towards him and very blatantly showing her pure white undies.
"Mhm~... A powerful man like you can offer me your essence, and your virility would help me make a very potent reproduction-enhancing potion for my 'shrooms!" She declared, now waving her hips slightly. "Then, I can produce as many of whatever amazing mushrooms I want, whenever I want!"
Granted, he could tell she was a little- a lot mushroom-crazy, but even the most inept of people wouldn't just outright ask for sex just for some potion. No, this was an incredibly thinly-veiled offer: "Mr. Adventurer, get over here and fuck me stupid!"
"So~..." She said, standing up straight again before walking over, bending to prop her head on her hand, showing off as much cleavage as she could, which wasn't much more than before, given her stature. "What do you say?~ Would you be so kind to a poor, lonely witch such as I?"
After a moment, Izuku reached forward, his rough but warm palm against her soft cheek as she cooed happily, and his thumb went up to brush aside more of her hair so he could see the excitement in her eye. "... You know what? Get on your knees."
Just as he said it, she dropped to her knees while still looking up, her eyes lighting up with the excitement that her dreams were literally coming true! "If you want my seed so badly, you should suck it out yourself!"
Her answer was immediate and eager: "Yes, Sir~!" She didn't hesitate to lean up and grab the buckle of his pants and undo them, then grabbed the hem of his pants and underwear before suddenly pulling it down, only to get slapped by his cock as it sprang out, finally free.
It was like a massive, girthy mushroom, except it was so warm against her cheek and throbbed every moment or so, seeming to inflate even further as she took a nice, deep whiff of it. "Th-this is just like m-my book…" She said in awe seemingly to herself, before leaning up to give it a small, experimental lick. "Ooh! But it never said how tasty a real man's cock was~..."
"Oh, I get it now." Izuku said, putting a hand on Kinoko's head. He slanted the hat back a little and began to pet her as she cooed happily, giving his cock another small lick as he moaned softly. "This whole thing is like a wet dream come true for you, right? A strong, lonesome-"
"Handsome, and sexy~" She added, before lovingly kissing the base of his cock.
He smirked before continuing, "- Adventurer comes out of nowhere, and one with a big enough dick to give you everything you want."
"Uh huh~..." Kinoko moaned, slurping over the side of his cock before reaching the tip and starting to kiss it over and over with a wide, nearly lust-crazed smile on her face as she did. "Please give me lots and lots of seed, Sir~"
He pushed her head down slightly and her eye sparkled with delight, forcing her to open her mouth and begin to suck on the tip of his cock, swirling her tongue around the sides with a small, delighted moan. "Lucky for you then, right?" He asked as she mewled with pleasure and kept sucking his cock.
'He's right,' She thought happily as she went a few inches deeper, sucking his cock as it went deeper into her mouth and throat. 'I have a handsome, hung man making me suck his cock, and he'll help with my potions~...'
His hand gripped her hair as she started to bob her head on his fat, warm cock that throbbed into her mouth. "Did your books teach you how to suck cock like that?" He teased, pushing her slightly down as she started bobbing even faster, her cheeks puffing out slightly as she did.
She kept going down on him until she could finally reach the base of his cock, feeling how his hot 'sword' used her throat as a sheathe right down to the hilt. Pleased with herself, she looked up with pure adoration in her eyes as she began to bob her head up and down on his cock, moving away barely a few inches before moving back in, pressing her chin against his heavy, full sack each time.
Time was a little lost to them both, but she knew a few minutes had passed of Kinoko blowing him before he groaned and placed both hands on her head while his cock began to throb harder in her throat. "Here! You wanted my seed so badly!? Take it all!" He roared, tugging her down as she gave a small squeal of delight.
He thrusted upward as she kept her head still against the base of his cock. His cock throbbed once more before he finally released what could have been a solid gallon of his hot, delicious cum until her stomach and cheeks felt close to bursting. Her eyes rolled back with pure bliss and moaned loudly as if begging for more already.
With a deep, relaxed sigh he pulled out as she shut her lips tight, looking up with her eyes sparkling before she could rise to her feet. Winking, she turned away and walked to her cauldron while swaying her hips wide, tossing and lifting her dress slightly to show off her ass as she leaned over the cauldron's brim and spat out every drop in her mouth, a bit reluctantly, mind you.
She panted as she looked over the cauldron and giggled. "There… Such a potent, generous load of virile seed, I'll have plenty-"
Just then, Izuku hunched down to slap his cock down in between her skirt-covered cheeks, enjoying the feeling of her soft and fat ass covered in her soft dress around his cock. "Oooh~..." She cooed with surprise, grabbing onto the brim of the cauldron. Looking up, she was again reminded of her books, and how some of the more dangerous and sexy male leads were described to have hungry and predator-like gazes as they had the leading ladies pinned under them.
"What a bad host I've been, to walk away when my honored guest is needing~" She said, starting to rock her hips back and forth slowly on his cock. "I'm yours to do as you want with, Sir, so don't hold back~"
Izuku pulled back enough to flip her skirt over her wide hips, and finally noticed that her dress was hardly wide by design, but her hips and ass were fat enough to make it look like an overly-frilly dress. He reeled his hand back and smacked her ass hard enough to make it jiggle and leave a bright-red handprint as she moaned happily.
Next, he took her underwear and tore it off with hardly any effort, letting her aching, needy pussy free as her juices rolled down her thighs and wobbly legs. He held onto both sides of her hips and pressed his thumbs against her cheeks, causing her to mewl and shake with delight as they sunk into the fat.
He pressed his tip against the entrance of her pussy and began to rub it up and down, teasing her for only a moment before pushing inside, letting her pussy grip his cock tight as she moaned like a bitch. "Gods… I-It feels like I'm g-gonna split in two!~" She moaned before he spanked her again and made her yelp with pleasure.
"I just stuck it in, you really might break by the time I'm done." He said, smirking as he went deeper and listening to her moaning louder. Izuku wasn't vain, but having a woman declare that he was too big to handle right was a novelty.
Slowly but surely, he pushed deeper, watching and listening as Kinoko squealed with pleasure and panted, her legs already bucking before he could even hilt inside her. "I-I, Oh Gods!~ I l-love big, fat cock!" She declared just as he thrusted inside fully, slapping his thighs against her jiggling ass and his balls against her. "I-It's so fucking deep! You're g-gonna break me, Sir!~"
Izuku groaned as her tight pussy clenched around him tighter, filling every square inch of her insides, enough that he was sure it was pressing against her chest, not like she had complaints. "You'd love that, wouldn't you!?" He growled, pulling out for just a moment before ramming back inside as she screamed and clenched the brim of her cauldron for dear life.
"Yes, Sir!" She answered excitedly as he began to fuck her, clapping her cheeks with a steadily-increasing pace and amount of force, enough that each thrust rocked her and her cauldron forward and put her on the tips of her toes. "Th-This is so m-much better than those dumb books said!"
It was true, each thrust lit every nerve in her body with pure and maximum pleasure, even the rough thrusting inside her cunt and the powerful smacks of his muscular hips against her fat ass only added to the overwhelming delight.
Suddenly he spanked her again as he began fucking her even harder, enough that the cauldron was teetering with each thrust. "Men c-can't help but st-stare at my butt whenever I-I go to town~..." She said, turning back with a lust-crazed smile, then yelped again as he spanked her ass. "S-So I can tell you love my fat, big butt too, Sir~!" And she was right, he couldn't seem to get enough of it as he kept slamming into her harder and harder.
"That's why i-it's your property, Sir!~" She declared, feeling her insides squeeze even tighter as she squealed with delight. "U-Use it, Use y-your property and make me cum! " Kinoko begged, finally screaming as she released with another harsh spank on her ass.
However, unlike most of her books where the sex scenes ended with them both joining and cumming together right at once, followed by the afterglow, he just kept going like a breeding bull, holding her just as tight as he fucked her tight pussy just as hard as ever.
Hell, she had come three more times with her eyes rolled into the back of her skull and her tongue hanging out like an animal before he hilted inside and finally came with a deep, primal roar. Her insides were just as unprepared as ever, letting him practically inflate her insides and womb before it started to come back up, leaking past his cock and going down her legs, even slipping into her boots or over them and onto the floor.
She let out ragged, panting breaths as she slumped against her cauldron, even her legs had given out so her knees were pressed against the cold iron. Right now, the only thing keeping her up was Izuku's erect cock still balls deep in her cunt.
After a few moments he backed away but still didn't pull out fully like she expected, no, he instead stood up straight and lifted her like a ragdoll while keeping her in doggystyle, lifting her a few inches off the ground and yanked her back, before starting to fuck her all over again.
Now suspended in the air and pulled away from her cauldron, all she could do was take it like a living fleshlight, squealing and moaning with pleasure as he fucked her. Now he could use the full force of his strong, muscular arms to pull her back into his powerful thrusts, forcing himself even deeper than before and fucking her twice as hard as before.
In other words, a perfect, mind-blowing combination to fuck her absolutely senseless.
He fucked her like a savage, using his mighty arms, strong hips, and bitch-breaking cock to fuck her like she were just a toy or a breeding bitch to use and discard. And she LOVED it, she loved how much power he had over her, she loved how his cock melted her mind with lust and fucked her into a silly, drooling, and squealing mess.
She couldn't pay much attention to anything, except how he groaned and growled with lust behind her as he kept using her body as a cocksleeve, only turning her on more at the thought of such a dominant beast of a man railing her into utter mindlessness.
Kinoko had long since lost her concept of time, she was certain it was in the late evening around sunset, but once Izuku came inside of her again she found that she couldn't give a damn about anything else besides keeping his hot, filling cum deep inside of her.
Finally, Izuku pulled out, letting his cum start gushing onto the floor as he set her down on her knees with her back still up as she panted hard. He put a hand under her chin and lifted her head up so he could slap his erect, cum-covered cock on her face as she mewled happily, and licked it with a loving, soft moan.
"Kinoko, your bedroom is upstairs, isn't it? I wouldn't mind heading out to camp, but we'd both prefer if I stayed the night with you, right?" And naturally, she had no protests as she kept licking up his dirty cock of their combined juices. So, he effortlessly put her over his shoulder and took a moment to spank her ass hard, making her yelp as he brought her up the stairs and found her room before he tossed her onto her bed.
Admittedly the bed was fairly small and would probably be a little uncomfortable for him to use, but at the moment it only made him look bigger and more beast-like as he got onto the bed behind her. In response, she rolled over onto her knees and put her face to her pillow, before raising her ass high again and shaking it for him, letting her thick and wobbly cheeks clap together in an open invitation to just grab her by the hips and fuck her until the bed broke.
Neither Kinoko or Izuku knew what exactly they did to get so lucky, but as Izuku grabbed her by the hair peeking under her hat and reeled it back as he hilted inside again, making her squeal with utter delight as she begged for more, neither cared.
The neighboring town was only a few miles north, it was a town Kinoko was familiar with as it was where she went to sell her mushrooms and potions and shop. And so, because she was so familiar with it, she was able to guide Izuku into the adventurer's guild a full three days after their first encounter.
They walked in nearly side-by-side with Kinoko barely half a foot behind him, in her normal mushroom-themed garb and utility belt, but with two major and odd additions: One, she had a large backpack with all the things she could carry from home, from books to ingredients, to tools, to potions, to clothes, to food, everything she could need for a while.
Second, she was being led by a leather leash attached to her new, matching leather collar. As odd as it may have looked, the bright, almost dopey smile on her face was certainly a very big contrast to the rough-looking leash and collar.
And so, with the first mate to his party a botanist witch (and his cocksleeve) Izuku eventually formed a full party over the course of several months before they marched onto the Demon King's castle:
A witch who specialized in astrology named Uraraka who was not only great for covering great ranges and buffing the team with her magic but would also become Izuku's first wife… Who, as time would eventually reveal, was also a massive cuckquean, who actively encouraged him to sleep around and have more obedient pets like Kinoko, or more brides.
Then, they met a pair who traveled together for a while, a crusader called Yoayarozu Momo and a bard who was called Jirou Kyoka. As it turned out the two were lovers, but soon after joining the party Momo became Izuku's 2nd wife, but like all bards: Kyoka was a bisexual disaster as well as a certified freak and was happy to be Momo's favorite pet.
On their journey, they also met a swordfighter, Ashido Mina, who didn't actually get recruited. No, she heard stories of a party consisting entirely of one notably handsome man and his harem, tracked them down, and the next morning she was just there… Well, there as in, they all woke up to her riding Izuku in his sleep.
Before long they met a thief named Hagakure who had the power to become invisible, a power which was almost exclusively used for shameless exhibitionism because with as strong as their party had grown, stealth had almost become inadequate.
And finally, a Frog-Beastwoman who supplied her superhuman agility- Not that it was the leading reason she joined the party, it was mostly because, by the time they were ready to move on from the town they met her at, she was already pregnant and stuck to Izuku's side, not that he minded, of course.
And so with their party completed, they traveled the lands, leaving defeated bandits, monsters, and ruined campgrounds in their wake until finally, after months of adventuring, (Which very well could have been weeks if they actually moved in the mornings or traveled in the evening) they were upon the Demon King's castle. Or rather, the Demon Queen, Kayama.
So our hero Izuku did what he did best, and bent Kayama over her own throne and fucked her until she swore off attacking humanity, and soon swore her entire Demon Kingdom to her new husband, which she finalized while riding his cock as he sat on the throne, while Ochako and Momo sucked and worshipped their newest sister-wife's tits.
With the kingdoms saved and the Demon Queen subdued, the party celebrated and decided to all live together in Kayama's castle, and lived a life of luxury in such a way it was hard to tell when one orgy or romp started and when another ended.
And such goes the tale of the hero Izuku and his party/harem who saved the world, and they all lived happily ever after.