u/KumoKosmos

Sitting down in the hotspring, I let out a long sigh. Water rising to my neck, completely submerging my body in its warm embrace. Neck tilted up, I see a pretty full moon hanging overhead. All the superstitions around that thing, the crazy monsters, the line between man and wyvern being blurred, all of it… is stupid. 
“Haha… thanks to their folktales and nursery rhymes, I get to enjoy this all to myself on a night like this.” Realizing nobody else will be coming here, and that I can only do so due to being a researcher, I toss my bath towel onto the stones and let my petite body truly unwind. The water runs past my balls and soft penis with no issue, not that they were ever big or anything. I’ve been… well, mocked, to put it lightly. A studious nerd who can hardly lift a bowgun, let alone fight, is short as they come, and always wears kilts? 
…okay, to be fair, they are skirts with shorts beneath so my balls don’t end up hanging out. But the fact that nobody could see any imprint through them despite being so tight did me no favors. And with a body free of many scars besides one across my chest from shrapnel I barely survived… I hardly look “tough” like so many others. Let alone, my only claims to musculature are my thick thighs and strong calves from running around all day.
…
…
Maybe this all does get me a bit heated after all.
Well, whatever. Hunter, popular, strong, feminine, it doesn’t matter when I have this hot spring all to myself!
Eyes closed with only gentle wind and moonlight caressing me above the water, and gentle laps of hot liquid below, I hardly pay mind to the new slipperiness coating my skin. Or the waves growing ever-so-steadily larger.
What I do notice, is the light being blocked from my eyelids. 
“What now, clouds…” My voice trails off as I’m met face to face by a pale cream snout sat atop a long, white scaled muzzle. With two bright blue eyes staring into my own like I’m a snack, pink fins currently red with hormones, and bubbles that are my size floating around in the air… I realize it’s a Mizutsune that interrupted my bath. Not just any, like a playful female, but a male in heat, based on the red coloration. 
Terrified, I lift myself out the water, before my hands slip off the stone I was using as leverage behind me and I slam back in. 
Pain fills my senses, then a roar turns into a quiet confused chuff, before it all fades.
***
Opening my eyes again, I feel… something warm beneath me. Warm and wet, with my face buried in something fluffy despite the moisture coating everything. Beneath the valley of deep purple strands as thick as my fingers and as long as my forearm, I notice some white patches. Running my hand across it carefully, I recognize them as scales. I know one hunter had fashioned a mizutsune bed, but I know this isn’t it. Both because that bed didn’t have a pulse… and because it didn’t have hot breaths that make your hair stand on end mixed in with it.
Sitting up and looking around, I see I’m straddled on a Mizu’s stomach, with my back against some warm and sturdy backrest. I’ll just call him Miza at this point. He’s watching me with a calm, almost excited look. The same kind I’ve studied males giving females before… breeding…
Turning around, I’m left in awe… from a fleshy slit revealed in his scales, two monstrous cocks emerge. Both are long, starting as thick as my hips each, and culminating to a tip that’s as thick as my wrist. And near pink throbbing rods’ tapered tips, within mere inches… are two small rings. Like the kind Kirin have, only near the tip and looking like it’s to lock into a female’s fallopian tubes, one each. I’ve always theorized it’s to seal it in, but to see it up close, with me as the subject no less… is so exciting my cock is throbbing painfully hard. 
I’ve always fantasized of a Mizu fucking me, or some sort of monster. But one that’s an easy gold crown, with a maw so big it could fit my torso in its mouth, a tongue as long as my torso, and cocks longer than I am tall?
It’s more than I could ever hope for. Screw being a researcher; even if my cock is only a fraction of his size, I don’t care. I want it, and I want him to love every minute of it.
Mizutsune are the best option, too. They’re so careful and smart with smaller monsters and humans, they would realize not to push the whole things in…
I hope. I’m no hunter or wyverian.
Letting out a low rumble, he leans in with his immensely flexible body, giving me a lick across my small cock, up my stomach, flicking past a nipple, then ending with tracing along my collarbone. Shuddering and dripping pre onto him, and seeing his cocks leak some of their own, I guess I passed his test. Whatever it was.
Suddenly, I feel gravity flip backwards, my back landing against his fluffy chest and belly, while my thighs and balls press against his massive balls. Then, those cocks point up towards his face and put pressure on my own body, laying atop me like two giant logs. He folds his body over me like this so his tail- covered in purple fur that’s like bristles on a massive fluffy brush- completely buries me. I can’t see and my hearing is muffled, but I can feel everything around me, including his heartbeat through the two cocks against my body. They’re easily longer than I am tall; my ass is at the base but the tips are past my head.
The tail shoves up my body, his cocks flexing a bit and making a slight hook halfway up their lengths- something I didn’t even know they were capable of, and catching my shoulders in their smooth, hot embrace. Now suddenly, as he brushes up my body with that fur, it doesn’t displace me but strokes our cocks together along with all the soap being scrubbed along us.
Moaning softly, I feel my hard cock pressed against his, pinched and stroked by the heavy rod. But I can’t do nothing, the cock isn’t just there, it’s up in front of my face, travelling down my neck and hooking around my shoulder and down my back. The other cock is doing the same thing on my other shoulder, my cock pinned by where they’re stacked atop each other at my thighs, where my soft legs are wrapped around the twin bases.
Tilting my head down, I lick at the cock I can reach my tongue to first, hearing- or well, feeling, a low rumble come from him. They taste like bubblegum, so I just keep going, licking at the shaft and hearing him rumble and scrub me more aggressively with that tail. Fur tickling and brushing my nipples, I feel my cock start to twitch in no time. The rise of pressure from below, I’m going to cum in no time!
He must sense it, because… he speeds up, bringing me right to the edge. My nipples feel hyper-sensitive, my balls are tensing up as they prepare, and… he lets up. He unwraps and lifts his cocks up into the air, watching me with what I think amounts to a giggle based on the quiet chuff. 
Slowly, I sit up, shuddering as my balls swell a bit from being edged like that. And looking up at his cocks, I shudder and turn around, spreading my ass for him. “P-please… ffuck me.” 
Turning away as if he didn’t hear me, he leaves me looking almost sad. Grumbling, I slowly stand, grabbing one of his cocks and pulling it down to my ass, feeling it wiggle around as I place my ass against the tip. “I said…” shoving myself back into it and letting my weight carry me, I feel the thin smooth tip punch in easily, then the small knot pop into me, then several inches of the shaft before I feel myself get caught on the sheer thickness. 
“HaH~! S-sho biig~!” The part at the entrance of my ass is as wide as my thigh, and I can feel it pressing against my prostate with the sheer girth. It’s travelling up through there, and winding its way up through my intestines like a custom path it made, apparently prehensile enough to easily shape to fit it. Looking down at myself, I can even see the shape of the cock at my base bulging out in me, before slowly tapering off and vanishing halfway up my body, above my belly button, where it’s too thin to make an impression.
His rumbles fill the air, before bending down and licking my cock clean of the pre I’ve shot out, seeming to enjoy the flavor enough to keep licking and licking at it. His tongue is smooth and slippery, wrapping around the bottom of my tip before coiling around the whole thing with impressive skill. It’s so good, I can’t help it.
White cum spurts out into his tongue, then another shot squeezes out past the wraps and drips down it onto his fur. He just pulls his tongue back into his mouth, savoring the taste while I feel his cock throb in me. And his other cock moving beneath me and popping up in front of me, the tip in front of my face and rubbing my cheek. 
Opening my mouth wide, he shoves it into my throat before pausing, as if he realized I’m fragile. But I don’t care, I stop gagging quickly and start sucking. Grabbing the shaft, I rub it while sucking and licking rapidly, tasting amazing as bubblegum flavored pre pours into my throat. And the ring-like knot is the most sensitive, each time I lick it I feel the one deep inside me and the one in my mouth swell a little more. How big will it get? Can it knot my throat?
Excited at the prospect, I grab his shaft and pull it up, wanting him to push more in. And he does, the one in my ass starting to worm further in, pressing past my prostate for every inch. My moans are choked out by his other cock going down my throat, the knot worming its way in and getting buried halfway down it. I can’t breathe, but my cock has never been harder, shooting out cum just from this. 
‘I really came without my cock being touched!’
Feeling the knots swell much thicker, I know he’s following close behind. They grow, and grow, so thick I’d compare them to donuts, making my throat and my torso bulge out to the shape as he plugs me from both ends. ‘Stuff me, fill me up!’
The first rush of cum is huge, making my stomach bloat out and distend forward. It pours down my throat with a lot of force, even with me trying my best to chug it down. It’s a thick milkshake almost, an even consistency that tastes like gum. The second shot has my vision blurring from lack of air, my stomach bloating further out, the shape of his cocks clear still thanks to all the cum getting stuck only in my stomach, none inside my intestines or throat.
Finally, one last pump leaves me looking like I ate all the food at base, his knots going down very quick so cum and start processing through my body. His cocks pull out with ease, but making me cum again as he threads out of my ass. 
Coughing up cum and gasping for air desperately, I land on my stomach on his belly, feeling two clawed hands cradle me carefully close. As I recover, I look up, smiling at the sight of his now much calmer eyes. He’s not in heat anymore… “love you, big guy. Or… Miza.”
He lets out a low roar, not one of territory or anger, but of celebration. And honestly, I’m pretty sure he understood me.
…god, the guild is gonna be pissed with me. Haha...