Note: The human in this story is explicitly an AMAB (assigned male at birth) nonbinary individual who uses they/them pronouns. Words for male genitals are used for them, but they are not a man and any suggestion of that in the comments is not welcome. This piece is not intended to fetishize trans/nonbinary people (I'm a nonbinary trans person), so any comments found using transphobic slurs or otherwise trans-related fetishistic language will be removed (general transphobia/enbyphobia will also not be tolerated).
Also, this work contains a significant part that involves cardiophilia (a heartbeat kink), and the alien character has two tentacle dicks. If that's not your thing, then turn around now.
Both characters depicted are over the age of 20.
Thank you, and enjoy!
~*~
"We lucked out," Kainoa said as they began stripping out of their clothes. "I can't believe there's nobody here."
Maxim followed their lead, gripping the hem of his shirt and pulling it up and over his crocodilian head. "Everyone's still enjoying the festival." He stretched out his fan-like back fin, the matching one that ran along his skull and neck flaring with it. "It'll still be a few hours before we see anyone else."
Kainoa could still faintly hear the jovial sounds of celebration in the distance. Maxim had brought them to his homeworld, Khrykol, to take in the Festival of Elzor. The Crogalli race gathered annually on this night to witness Khrykol's third moon appearing over the capital city, having completed its year-long orbit. The parties went on until sunrise, Elzor shining down upon them all. Her cool, blue glow illuminated the calm water in front of Kainoa and Maxim, casting flattering highlights and shadows upon the handsome Crogalli's features.
The lake was a very enchanting spot. Khrykol's dusty, blue-green foliage lined the edges. Bioluminescent pollen floated and swirled by on the evening breeze. Nearby stood an old Crogalli ruin—a remnant of a long passed, dark age of wars and turmoil. It was a stronghold of sorts in a dilapidated state with missing pieces of walls and towers that had crumbled and could be seen poking out of the water where they had fallen.
Kainoa and Maxim had stolen away to this place from the crowds to enjoy some solitude, take a moonlit skinny dip, and—seeing as they were alone out there—Kainoa hoped that the two of them could get up to a little something more. Sex had been on the human's mind for hours now. It was hard for it not to be; what with the jeweled plug still deep in their ass and all.
They had spent time prepping themself while Maxim had been enjoying one of his inordinately long showers. It had been hard to stay quiet while doing so, but they had succeeded in stretching their ass and inserting the plug. They had even had enough time left to spare to stand in front of the mirror and admire the cute, blue, heart-shaped gem.
The intended end to it had been to reveal the plug's presence to Maxim upon returning to the hotel; a fact that they knew would drive the Crogalli wild enough to swiftly replace it with his cocks in a near-instant. But Maxim had insisted on taking a dip in some cool water just around the time that Kainoa was going to suggest heading back. Not that they were at all averse to lakeside sex under the stars—even if they had been, they couldn't wait any longer.
Kainoa clearly had a good poker face because their boyfriend hadn't caught on all night. It had been a battle not to squirm whenever they sat down. There had been a few times that they had almost exposed their secret when the plug shifted inside them just right and pressed against their prostate. Their tongue was a little sore from biting back moans.
It was a good thing that they weren't one to get hard just from anal stimulation; they always needed to have their cock stroked or sucked for that. Having to hide a raging boner all night would have been one too many extra elements. But the plug still felt amazing, stuffing them and keeping them loose for Maxim. The sight of their boyfriend stepping out of his pants, his muscles rippling under glinting scales, was the final culprit of their peaking arousal.
Maxim waded out into the lake until he was waist-deep and enthusiastically leaped in the rest of the way. He disappeared under the water for a bit before his fins poked out from the surface and he reemerged.
He turned, water dripping off of his snout. "Come here, babe," he said. "It's not cold at...all."
Kainoa smiled as his voice trailed off. Maxim had looked to his partner to find them stroking their cock to full hardness, having walked towards him until the water was licking at their light brown thighs.
"How about you come here?" Kainoa purred.
Maxim didn't waste time with a reply. He swam forward, stood, and strode up to Kainoa, his four eyes flashing in the light and not leaving his partner's gaze. His reptilian lips parted on a heavy exhale that dripped with desire. A roguish smile followed.
"Better to work up a good, hot sweat first," he said. His hand reached between them, gently tapping Kainoa's wrist. "Here; let me."
Kainoa allowed Maxim to wrap his large fingers around their cock. They let out a gasp as their hole clenched around the plug, digging it into that sweet, sensitive spot inside them.
Maxim stroked them slowly. He used his free hand to brush their shoulder-length, lightly curled hair away from their neck before nuzzling his snout into it. His breathing grew deep; he had always gone on about how good Kainoa's scent was. He groaned, his tongue darting out against their pulse point.
"Have I told you," he said lowly in their ear, his fingers threading lightly into thick, dark strands. "How much I love that you grew out your hair?"
"Only about a—hah—a hundred times since I did," Kainoa said. "Nice to play with, right?"
Maxim hummed. "Yeah...can say the same about this." He stroked Kainoa's dick a little faster. A single affectionate purr rumbled through him as his partner moaned and rocked minutely into his touch. "All of you is so fucking beautiful...I love you."
"I love you too...you big sap," Kainoa said between breaths.
Scaly lips brushed against the shell of their ear, warm breath ghosting over their skin. Their gaze flicked downwards and they saw that Maxim's cocks were now protruding from his slit. The tentacle-like members were light teal and shiny with his natural lubrication. The clear, slick liquid rolled off the smooth flesh and dripped into the water.
"Let's not forget about you," Kainoa said.
They reached for the lower of Maxim's cocks, taking it into their hand. As they began stroking, they felt a shiver run through the Crogalli's frame and his upper cock wrapping around their wrist. It contracted against them, hot and pulsating.
Maxim pulled back from his mouthy attentions at his partner's neck to draw them into a kiss. The reptilian mouth was still sweet from overly-sugary festival food as Kainoa's tongue roamed over sharp fangs to meet Maxim's. They began to jerk him in earnest and their increased speed was immediately reciprocated.
The large, calloused hand on Kainoa's dick was nearly making them shake. After hours of trying and failing to ignore it, they gave themselves up to the feeling of the thick plug inside of them, riding the intense pleasure of its stretch. Even the slightest of clenches upon it, coupled with Maxim's strokes, started to pull loud, unabashed moans from them.
Maxim chuckled. "Damn, you're really feeling it tonight," he said, breathing hard against their lips. "I'm just jerking you off but you sound like you're getting fucked."
As much as Kainoa wanted just that, their attention had zeroed in on Maxim's pulse beating under their palm where they had rested it against his neck. It was a weird kink of theirs (or not so much; as Maxim had reassured them when they had told him), but they got off on heartbeats. They loved feeling and hearing their boyfriend's pleasure pounding from inside of him. It was quick for the moment, but they wanted to get it racing.
Maxim seemed to catch on as he saw where they were looking. He grinned; he knew how to best help them indulge. His hand left their dick and they similarly released him.
"Lemme get around you," he said.
Kainoa nodded and watched as Maxim coiled his cocks around theirs. The appendages lightly squeezed, sheathing the human in a mind-blowing tightness. They brought their head to Maxim's chest, their ear pressed just below his left collarbone. They could hear the deep, heavy-sounding thumps of his heart. It was equal parts comforting and arousing. The sound went straight to their cock—almost literally as they could feel Maxim's dicks throbbing in time with it.
Their boyfriend's hand came up to hold their head where it was, gently carding into their hair once more.
"S'that good? Do you hear it?" he asked. "How excited I am?"
"Yeah," Kainoa gasped, their own heart rate having already surpassed the one in their ear. "I—shit...can I move?"
"Fuck me to it," Maxim said. A reptilian hiss of breath left him. "Let's see how long it takes for you to not be able to keep up."
Following the fast rhythm of the beats, Kainoa started thrusting. The sound of their cock rubbing in between Maxim's was wet as the Crogalli's slick increased. With each thrust, Kainoa's tip would breach Maxim's slit only slightly, but the simple added penetration was enough to send shocks through them. The heat of it sucked them in deliciously every time and they made a mental note to ask their boyfriend to let them properly fuck him there some time.
The pleasure was starting to bring out Maxim's voice. Low groans gave way to loud, unrestrained moaning. His heart was galloping, pounding hard in his heaving chest. Kainoa placed their hand next to their face to feel it. They managed to stay with the thundering pace and drove their hips into him.
Kainoa's own cries were added to the mix as their hole kept tightly hugging the plug. Their insides felt full and crowded in the best possible way, and it was making them hyper-aware of their overstimulated prostate. The bundle of nerves was being mercilessly ground and pressed. It had been teased for hours and was retaliating by being the epicenter of some of the most intense waves of pleasure that Kainoa had ever felt.
