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It was like he was saying mine, mine, mine.
Like every piece of Gundham's naked body thrusting into Hajime’s was imprinting on his very soul that he belonged to him, body and soul.
“Yes, yes, yes.” Panting and chanting in response, Hajime agreed.
Even though his cabin was decently out of the way and though it was close to midnight, some part of Hajime worried that the others on the island paradise would hear his indignant moans and Gundham's primal, pleasure-filled grunts from his bed.
“You like this, mortal?” Gundham's course yet slightly wavering voice only spurred Hajime’s walls to tighten around his boyfriend's pounding dick.
“Yes, please, Gundham.” His breath always hitched at his name, like saying it would only further turn his body into another one of Gundham's pets. But that thought, too, only served to make him wetter.
“Yes, what?”
Gundham never stopped his thrusting, never, only hoisted Hajime's leg up, and it was a dose of dual pleasure. For every bit of extra length it gave Gundham, the faster it made him thrust into Hajime's soaking, overly-sensitive pussy. Every single second was bliss, tearing filthy sounds from his lips.
“Please, Gundham.”
The words tore out of his raw throat before he could realize just what he was begging for. Writhing on the tousled sheets, twitching under the weight of Gundham, so sensitive he felt like dying, it was hard to keep his mouth from moving without his permission.
“You want this-” With an especially rough thrust, followed by an evenly rough, drawn-out groan, Gundham continued, “Hajime? You want me to breed you, human?”
It didn't matter that the rational part—the not getting his throbbing pussy fucked to hell and back part—of his brain whispered its reminder to him that it wasn't possible with his surgery, the other parts, the ones that craved more—more pleasure, the third, fourth, fifth orgasm of the night—cried out yes, yes, yes.
“Say it.” Hajime loved every time his body made Gundham use that commanding, confident, gruff you are mine tone. “What do you want, boy?”
Hajime just whimpered when Gundham reached a hand down to rub circles around his sensitive clit. It had been abused and used, bringing him to climax over and over for the past hour, even without a single finger touching where he truly wanted Gundham to touch, but even still it didn't hurt; it only made waves of mind-numbingly intense tingles dance across every inch of his skin.
“What do you want, boy?”
“You!” He cursed under his quickened breath a few times when Gundham liked his answer and proved it with more intense circles across his aching clit. Following more curses, “I want you to come inside of me. M-Make me your pet, Gundham.”
Breed me.
“Good boy,” Gundham purred, leaning down to nip at his ear and whisper, “I'll give you what you want, Hajime. You will be mine and mine forever.”
At his words, Hajime only felt that desire to be his, to be owned, deepen. It was so easy for the orgasm building over the last ten minutes to suddenly tip over the edge at Gundham's silky yet rough growls, with even rougher thrusts. It wracked through his body violently, almost sharp, yet still with no pain to follow.
Without him even saying a word, Hajime felt the very moment Gundham stopped holding back his ravenous appetite for Hajime's body—so far only kept in by the willpower to make sure he got off first—and pound into his body with reckless fury. It didn't matter how overly sensitive he still was, tears threatening to fall from the overstimulation, Hajime loved every second it took for Gundham to finally finish inside of him like he so desperately begged for.
Those moments where the rest of the world faded away until all they could hear was each other's ragged breathing and the clicking of cicadas outside were long, feeling like a blissful eternity. Gundham leaned down to kiss him, soft and sweet, like he always did after an intense night. Grateful for the kindness, Hajime leaned up and pressed into it. Gundham made a sort of chirping noise, clearly surprised.
“You did good.” Hajime let his boyfriend pamper him with a trail of kisses across his cheeks and down his neck. Every inch of him must be soaked in sweat, but still, it never bothered Gundham. “You always take me so well. Always.”
Always had only started with ending up on the island, stranded with classmates who they'd never met, watching a stuffed rabbit beat up a bear, and spiraled into this. But Hajime wouldn't trade this for anything else.
“Love you.” He whispered and pulled Gundham's warm body on top of his. He slipped out of him gently and rolled over onto the sheets right next to him instead. Even in the darkened room, their eyes met easily.
Not rough, not after something that intense, but soft, a voice meant just for Hajime. “And I you.”
Gundham kissed the side of his neck once more, and then their hands and bodies linked with each other like they were both saying mine, mine, mine.