Lynn looked excitedly over at the sleeping beast, marveling at the green scales covering its body, and the spikes running along the creature’s draconic form. The forelimbs tucked under its body hid the wings’ webbing that went from the chest to arms of the creature. It would be a more marvellous sight if not for the various dents in its scales and broken spikes it incurred as it was captured. The cause of the damage grinned as she walked towards Lynn, patting the girl on the shoulder as she walked over still in full armor, a massive hammer strapped to her back.
“She put up a good fight, this Rathian did. Though I’m sure you would love to examine her closely~” The woman chuckled.
“It is good to see you are unhurt, Raine.” Lynn replied, smiling at the bigger woman.
“And the degenerate researcher cares about a human for once, how surprising~.” Raine commented, grinning as Lynn winced at the nickname. She really wished people appreciated her work more, and not judged so much. How else were they going to find out that Barroth cum made great fertilizer other than jacking the great beast off anyway?
 
“Anyway, I’ll leave you to it, let me know if you want another beastie captured, ok~?” Raine said Realising that Lynn was lost in thought, she decided to playfully lean down to give the girl a kiss on the forehead, walking off before she could see Lynn’s blush in reply. Lynn took a moment to regain her composure, grumbling at Raine for always teasing her like this, silently wishing their relationship would progress. Shaking her head to clear the thoughts away, Lynn looked back at the sleeping Rathian. The queen of the land, as some called it, was a magnificent beast and female of their species. Lynn was curious about the sexual anatomy of the beast, and now would be the best time to explore it, as most of the other researchers had left her alone to allow her to do her more perverse examinations first.
 
 
With a lot of work and help from the various cranes around the enclosure, Lynn managed to sit the Rathian up, and rest its back end on specially made stands, leaving the creature’s sex exposed for all to see. The researcher climbed up onto the support, blushing as she examined the wyvern’s slit, each breath taking in more of the creature’s musk. The flesh quivered as she rubbed around and she soon decided to reach in, surprised at how spacious it seemed. As she pulled her hand out, she had a thought of examining the wyvern’s internals. She flicked the juices off her hand and ran off to get a pack and write a note to Raine. The hunter was currently away from camp on another hunt. She then filled her pack up with rations, in case she was out longer than usual, and brought along her marked notebook and a lightstone before returning to the Rathian.
 
 
Lynn made sure the pack was strapped securely to her back as she climbed up on the support once more, placing her hand against the warm flesh of the sleeping wyvern. She carefully stuck her arm into the Rathian’s warm snatch, feeling the muscles clench down slightly and relaxing as she felt around, before she put her other arm in. The Rathian let out a small growl as Lynn pushed herself deeper into the warm slit, the muscle movement feeling like a rather pleasant massage on her entire body. Lynn licked the fleshy walls as she squirmed deeper, enjoying the salty, musky taste, while the creature outside trembled in pleasure as the human wormed her way down its pussy, towards the womb. It wasn’t long before Lynn pushed herself through a tight ring of muscle, and fall into a rather spacious womb, her form impossible to see under all the strong muscles and scales of the beast. She took notes of her actions in her notebook and examined the fleshy walls around her, though she was soon lulled to sleep by a combination of the warmth around her and the rhythmic breathing and heartbeat of the creature that she was within.
 
 
As Lynn slept, the other researchers began work on their own experiments, acquiring basic scale and claw samples and performing other more mundane tests. They saw Lynn’s special support, but it wasn’t the first time she left the support there to run off and record her findings. They were soon done, and after removing Lynn’s supports, prepared the creature for release, not knowing that Lynn was still sleeping within.
 
 
When Lynn awoke, the Rathian was already awake, and she could feel the monster flying. Her body bounced about her fleshy prison as the Rathian looked for its prey. She tried to stay as still as she could, hoping her movements didn’t excite the great beast, but with the slick walls, it was almost impossible to not get tossed around in the slightly confined space. With the lightstone, she could see the exit, but even if she could squeeze her way out, the Rathian would gulp her down the moment it spotted her. With nothing else she could do, she began documenting her experience, hoping that it wouldn’t be the only thing the others found of her.
 
 
Lynn had dozed off again before being awoken by a roar from the Rathian, moments before feeling gravity shift as the creature dove down on its prey, the impact throwing her against the strong and fleshy walls of her prison, sending a shock of pleasure through the creature’s body. It panted in arousal as it ate, idly rubbing its rear against a nearby tree as it ripped apart its meal. Lynn could hear the Rathian’s stomach kick into action as chunks of meat from whatever poor creature that was hunted splashed into the Rathian’s empty stomach. The sound reminded Lynn of her own hunger, and she decided to have a bit of her rations, before realising that she might just starve to death within the beast.
 
 
It wasn’t long before the Rathian flew off after her meal, this time looking for something to sate her other needs. Letting out a cry Lynn had never heard before, the horny wyvern called out to her mate, and flew off to her nest to wait, giving Lynn a moment of rest as the Rathian waited patiently for her mate. Lynn had finished eating the last of her rations when she heard wingbeats approaching. The Rathian looked up to the now dark night sky as her mate lowered himself beside her, his cock on full display and already excited from his mate’s scent. Without any prompting, the Rathian raised her rear, giving her mate easy access to her moist slit, the Rathaos thrusting deeply into her.
 
 
Lynn shivered as she felt each thrust shake her fleshy prison, the walls tightening as the Rathian got more into the act, soon squeezing down on Lynn, locking her in place with her rear pressed against the Rathian’s cervix. She could feel the thick member beating down on the cervix, roars resonating through the flesh as the two massive creatures got into the heat of it. As soon as it began, the Rathalos climaxed, shooting his seed deep into the Rathian’s womb, almost drowning Lynn in its seed in the process, some of it even managing to push its way into her body, bloating her up and knocking her out with the pressure. After they were done, the two beasts began nuzzling each other in the afterglow, the Rathalos’ member still knotted in the Rathian’s netherlips.
 
 
When Lynn came to, she felt that something was off. The fleshy walls that made up her prison were partially replaced with a slowly growing hard wall. Panicking, she began feeling around for the cervix, managing to push her arm through, but the tight ring allowed little else through. Even then, she felt something tight and fleshy past it, unknowingly sticking her arm into the urethra of the Rathalos. With the wall slowly encroaching, she took back her arm and began writing, certain she would meet her end soon, and filled with a desire to get one last message to the outside. She had just barely finished writing and pushing her book through, before the walls started to seal her in. As she watched the walls form around her, she prayed that someone would find the book which she ejected from the Rathian’s nether regions. Exhausted and out of options, Lynn just gave up, deciding to fill her stomach with a bit of the cum pooling around her before closing her eyes and accepting her fate.
 
 
 
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Raine was worried. It had been days since she last saw Lynn, and although expeditions usually took some time, it was unlike her to not send any letters. Her own investigations of the area only netted her Lynn’s notebook, found in a Rathlos’s refuse pile. There had been reports of hunters who were devoured by the beasts, with only their bones remaining, so she was at least thankful she didn’t find any human bones amongst it. After informing the head of her discovery, she returned to her home to read Lynn’s notes.
 
 
“Just crawled into the Rathian’s womb. It feels quite soft, despite how strong the creature is. If I wasn’t in such a dangerous creature, I might actually sleep in here. The heartbeat is quite soothing though.”
 
“Oh crap, I fell asleep. The Rathian is awake, and I think the rest of the research team let it go already. At least I have some food…. The feeling of it flying is quite interesting, if it wasn’t throwing me against the fleshy walls like this.”
 
“Almost fell asleep again, but was awoken by a sudden gravity shift. I think the Rathian found some prey. I can hear the stomach of the creature going to work… I hope I don’t end up there…. My own food reserves are running low. I hope I’m not trapped here for too much longer...”
 
“Just finished the last of my food. The Rathian let out a strange cry earlier, and seems to be waiting for something. Attempting to escape only made the cervix clench down on me. Seems I’m trapped here for a while longer. I think I hear something coming….”
 
“Some solid walls are forming around me, I’m covered in Rathalos cum, and the cervix won’t open. I’m sorry, Raine…. But I think this is the end of me.. I just hope you can find this note…. I love you….”
 
Tears dripped down on the pages as Raine looked the book over once more, wishing there was more info on Lynn. Hopelessly, she closed the book and cried, unsure what to even make of the information or how to even begin to search. When she finally cried all she could, Raine stood up, determined to capture as many Rathians as she could, to find any hint of Lynn.
 
 
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Months went past, with Raine’s determined quest barely bearing fruit as she brought in countless large beasts. She was currently drinking at the canteen when a fellow hunter informed her that the head wanted to see her. Hefting her great hammer along, she eagerly followed orders, hoping that they had some news of Lynn. The head informed her that scouts recently discovered a peculiar object at the peak of the mountain in the ancient forest. A massive egg, bigger than a person, and the biggest egg anyone has ever seen. The reports also stated that a Kulu-Ya-Ku has been seen in the area, possibly trying to get the egg as well. Raine’s mission was to get the egg back to camp. Of course, Raine accepted, rushing back to her house to drop off her hammer for something a little more lightweight, taking a pair of daggers before flying by Mernos to the campsite close to the peak.
 
 
Raine heard a roar as she landed, and the sound of fireballs impacting flesh could be heard soon after. Pushing her way through the vines and foliage, she saw the Rathian chasing off the Kulu-Ya-Ku down the ramp in a furious rampage. She could see the egg in question, and even with her lessened load, wondered if she could even carry such a thing. After a few futile attempts, Raine decided to carefully roll the egg down the mountain, keeping an ear out for the furious mother. It was all going well, until an unseen steep point caused the egg to roll out of Raine’s grasp, and into some bushes, impacting hard against a few broken logs along the way.
 
 
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Lynn was dazed, she had no idea how long she was asleep for, or what was even going on. Her world spun and spun, not helping her condition, getting faster and faster before suddenly coming to an abrupt stop. In a dream-like state and seeing light coming from cracks of her prison, she began pushing out, wondering if all this were but a dream. Using all her strength, she managed to widen the cracks, her hungry belly rumbling as she grasped a part of her prison, bringing the pieces to her mouth to eat, following her instincts. She soon began gnawing at the walls, eating her way out of the shell as her eyes got used to the light.
 
 
Lynn looked around as she stumbled out of the now ruined egg, looking around and noticing Raine. Her energy spent from breaking out, she took a few steps towards her, muttering “R-raine… I missed you….” before collapsing to the ground.
 
 
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Raine cautiously approached the egg as it began to hatch, her daggers already drawn. She saw the creature’s claws ripping and pulling at the shell, gnashing of teeth resonating as the creature devoured the shell. As the shell began to fall apart, revealing the creature within, Raine froze in surprise, unable to believe that it was a humanoid figure that she was seeing. The being was covered in rich, pink scales, spikes running along her body, hiding her bosom, her arms conected to her body by a webbing, ending with sharp and dangerous claws for hands. The being stumbled out of the egg, allowing Raine to see the strong tail that came out behind her, barbed, spiked, and likely filled with venom. The being’s draconic feet crushed a few twigs as it stumbled towards her. Expecting a fight, the last thing she expected was the creature to speak. “R-raine… I missed you…” The creature said, before collapsing.
 
“L-lynn?!?” She yelled in surprise, keeping her daggers and rushing forward, putting her head to Lynn’s chest and sighing in relief as she felt the girl still breathing. Reaching into her pack, she pulled out a bundle from her pack, igniting it with a hit before launching it into the air with her slinger on her arm. “Don’t worry, Lynn… help is on the way…” She cooed, stroking the girl’s strange new body as she kept watch.
 
 
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Lynn snapped awake, yelling. Looking around the familiar room, she sighed in relief as she recognised her own room, thinking all that happened was but a dream. That is, till she reached up to pat her own head, feeling the scale plates and horns now adorning her body. Surprised, she jumped out of bed, looking down to see that her body had changed to something akin to a rare subspecies of a Rathian, a Pink Rathian. She flexed her arms, legs, and even tail, realising that they felt natural to her, despite her new form. Excited, she wrapped her tail in her blanket, not wanting to hurt anyone by accidentally stabbing them with the poisonous barbs, before rushing to the door, crashing into Raine in the process. “Raine~! I’m so happy to see you~” She let out, giving the hunter a kiss on the lips before the formerly bigger girl could do anything about it. “You had me so worried, you know. First disappearing like that, then fainting right after I found you. And now almost breaking my bones in a tackle.” Raine chuckled, patting the excited monster girl on the head, noticing her tail swishing back and forth excitedly. “Come on, we’ve got a lot of explaining to do…” Raine then said, gently pushing the girl off her so she could get up, Lynn followed eagerly, wondering what would be in store for the two of them with her new body.