𝙿𝚞𝚛𝚎 𝙳𝚎𝚟𝚘𝚝𝚒𝚘𝚗
Omega Mer Denki has had his eye on Fisherman Hitoshi as a mate, but accidentally gets caught before he can plan things through.
A ShinKami fic for MerMay!

Notes:
NSFW
Strange Genitals
Mer Omega Denki
Human Fisherman Hitoshi
ABO Dynamics with regular human
Mentions of de/ath
Happy ending!
Claiming marks

Feeling even more curious today, Denki found himself swimming closer to the boat of the human he had picked for his mate. He has been watching the human for months now, and he was perfect, an attractive male human who was the only one onboard the boat.

The human would spend hours sitting on the deck of the boat just watching the water, Denki was always careful to avoid his gaze, humans couldn't know about the merfolk.

Normally Omega merfolk could simply mate with an Alpha, however his pod didn't have any Alphas, so if he wanted to reproduce he'd have to mate with a human, and k/ill him after.

This human always being alone made him a perfect mate, and he wouldn't have to go close to the shore to lure him in either, he came right to him.

That at least was his plan. He just had to let curiosity get the best of him today, and now he found himself trapped in one of the nets the human let down, and was slowly getting pulled up with all of the other fish.

In a panic he let out a shock of electricity, stunning all of the fish around him and passing out himself.

Hitoshi ran to the side of his boat when he noticed a crackling of light coming from his net.

As the net slowly came up all of the fish seemed to be stunned and lifeless and out of the normally dull sea of scales he caught sight of some bright, beautiful iridescent yellow scales, on what looked like a large fish.

Once he'd brought the fish to the boat, some of them had started flopping back to life, as they did he saw more of those beautiful scales, revealing a beautiful man...fish? Merman?

His yellow tail shifted colors almost like a rainbow with the sun, and there was even a similar effect on his pale, pearly skin. Getting close to the creature he couldn't tell if it was breathing or not.

In a panic, he picked up the lifeless creature by his wide hips, and rushed to his restroom, carefully putting him in and began running back and forth to fill the large tub with salt water.

Once he'd filled the tub he sat in the bathroom and got a better look at the merperson. His damp blonde hair stuck to his face, Hitoshi nervously reached out to push the hair out of his face with a shaking hand.

As he did golden eyes shot open and the two men both jumped back in a panic with their own screams.

"Wh-where am I?!" Denki flailed around, only getting worse when he realized he couldn't move around.

"You're alive?! You can speak?!" Hitoshi was now standing further back in the small room, slowly stepping closer.

"Of course I can!" Starting to calm down more, Denki crossed his arms. "Last thing I remember I was being pulled up with a bunch of fish...I panicked and– WAIT! You're /that/ human!"

"'That' human?" Hitoshi questioned with air quotes. "Wait...are you that creature I thought I've been imagining for months? I always thought I saw something in the water but as soon as I tried to get a better look it would be gone."

"You saw me?"

"It was you!" He took a step closer to the mer. "All this time I thought I was crazy. Spent too long alone at sea."

Starting to get worried, Denki began chewing on his bottom lip, sharp canines showing. "You...you didn't tell anyone did you?"

"Of course not." Hitoshi chuckled slightly. "I thought I was going crazy. If I told anyone they'd surely think the same."

"So...what are you doing to do now that you found me?" The Mer timidly looked up at Hitoshi through his lashes, worried because his plan was to eventually mate and k/ill this human, he could only imagine what the human had planned for him.

"Make sure you're ok and let you go, I suppose." He rubbed the back of his neck as he spoke.
"You don't...want to k/ill me? Or take me to the shore and show other humans? Force me to take you to my pod?" As he spoke he began sinking into the tub.

"Of course not? Why would I do that?" Knowing the mer was still nervous he kneeled down with his hands on his thighs to get back to eye level with the mer.

"I've always been told that's what people do. We've been discovered in the past and had to go into hiding."

"Then what got you getting close to my ship?"

A bright blush covered Denki's pale cheeks and he looked down with a jump, not knowing how to say he had planned on mating with him.

"Just...got curious." Which technically, wasn't a lie.

"About?" Hitoshi slowly began working his way closer into the Mers space, so he couldn't avoid looking at him.
"You." Again, not a lie.

"Well," Hitoshi leaned back up, brushing off his pants, Denki's eyes following him. "My name's Shinsou, Shinsou Hitoshi." He held out his hand.
Denki's eyes darted from his hand and face, confused.

"It's an introduction." He explained. "I tell you my name, you tell me yours and we shake hands. Ok?"

Although still slightly confused, Denki nodded.

"Ok let's try that again." Before continuing he brushed his hand through his hair, bringing it back down as he started again. "My name's Shinsou Hitoshi."

Denki's pale, cold hand reached out and nervously grasped at Hitoshi's.
"Kaminari...Denki Kaminari."

"There!" His grip slightly tightened as he shook Denki's hand. "So Kaminari, what were you curious about?"
Feeling like he should take his chance while he could, Denki brought their hands down his body.

"Maybe it's better if I show you instead." He used Hitoshi's hand to carefully rub against his slit, where a warm slick and two thin tentacle-like appendages began to come out from the touch.

Hitoshi's eyes widened as he felt the warm slick coat his fingers and the two tentacles start to wrap around his wrist, pulling him in more.

"O-oh." Curious, Hitoshi looked down into the tub, seeing the two pink tentacles wrap around his wrist and a swollen fleshy pink opening that wasn't there before. The strange sight made blood rush to his own cock, which the mer quickly noticed.

Eyes widening, Denki took his free hand to reach out towards the growing erection through his pants. With his tentacles working at guiding Hitoshi's hand now, he brought his other hand out.

Big golden eyes looked up at Hitoshi as his cold hands took hold of his cock through the pants, making it twitch from the touch.

"H-here..let me…" His free hand went to hastily unbuckle his pants. Watching him struggle for a moment at pulling down his underwear, Denki hooked his fingers under on both sides, pulling the garment down making the hard cock bounce free.

"It's so... different." He whispered as he took hold of the hot cock using both his hands. A whimper came from Denki and his tentacles tightened around the wrist as Hitoshi slipped a finger inside his entrance, tired of teasing along his folds.

Moving his finger around inside, he could tell the deeper he went the tighter the canal was."M-more." Still holding onto Hitoshi's cock,he whined.
"Why don't you help me feel good too?" He thrusted his hips forward, causing the head of his cock to push against Denki's plush lips.

Golden eyes looked up somehow with innocence as Denki's lips parted and stretched around the head of his cock, not breaking his gaze as he moved down his length with ease.

"That's it.." His head leaned back in pleasure, slipping another finger inside to reward the Mer. He was surprised as Denki easily took his full length, his tight throat squeezing the first few inches of his cock.

When he brought his gaze back down to Denki he was still looking up and hummed with pride.
"Fuck." Hitoshi used his free hand to push through Denki's hair, brushing the blonde locks out of the way. "Can you move?"

Denki hummed around his cock in thought, his eyes darting down towards where Hitoshi was fingering him, as if to ask for more in return. Smiling, he pushed another finger inside, scissoring the three apart, making Denki moan, closing his eyes as he began bobbing on his length.

Hitoshi loved moving his fingers around, finding the spots to make the Mer moan or tighten up around him, or sometimes even make the tentacles around him throb.

Unable to control himself anymore, Hitoshi grabbed Denki by his hair and began fucking into his tight throat. Those golden doe eyes coming up to look at him again nearly pushed him over the edge.

"K-Kaminari I'm gonna–" Before he had a chance to finish his sentence or come his cock was met with the cool air again.

"No." Denki didn't even need to stop to catch his breath, Hitoshi wondered if he even needed to breathe. "You need to finish inside." His tentacles released his wrist, making Hitoshi pull his hand out.

The Mer pushed his hips up out of the water, his two tentacles holding his entrance open.
"Fuck, yeah. Ok." Hitoshi gulped, jumping out of his pants and jeans. "D-do you want me to get in with you?"

All Denki did was simply nod, biting his lip. "Right." Nervous, Hitoshi quickly threw off his shirt, kicked off his boots and got on top of Denki, water pouring over the sides of the tub as he did.

He didn't even have a chance to position himself before he felt the tentacles wrapping around his cock, working his shaft and guiding him inside.

Hitoshi watched Denki's face as he slowly inched his way inside, loving how it got increasingly tighter as he got deeper.
"Are you ok?" He noticed Denki wincing slightly.

"Y-yeah." Despite it seeming like he didn't need to breathe, he was panting as he spoke. "You're just... different." He paused, trying to find the words. "You're the same thickness...used to...it slowly getting thicker…?"
That would explain why he got increasingly tighter.

"Want to stop?" Hitoshi began pulling out, only for the tentacles that were working his remaining shaft to pull him right back in as Denki shook his head.

Once his hips were flush with Denki's tail he paused for a moment, taking in the sensation of being surrounded by Denki's tight heat, getting the two of them used to the feeling.

Right as he began to pull out to start moving he felt the tentacles tighten up around the base of his cock, making it twitch inside.
"I come first." Denki smirked, his hands clawing at Hitoshi's shoulders. "Then you can knot me."

Confused as to what Denki meant, but overwhelmed with pleasure, Hitoshi grunted a response and began thrusting into the sweet hole. He felt his cock get larger from the tight hold at the base of his cock, making Denki whimper and wrap his tail around one of his legs.

Hitoshi was glad he had that grip around the base of his cock because he knew if he didn't he would have came embarrassingly fast.

He'd never felt these sensations before, and he could tell Denki hadn't either by the cute faces he made whenever he pushed himself further inside, stretching out Denki's deepest, tightest parts.

A gasp escaped Hitoshi's lips as he felt Denki's teeth sink into the side of his neck.
"Mine." Denki growled, not releasing his grip from his neck.

It didn't take long after that for Denki's orgasm to hit, tightening up what seemed to be impossibly tighter down all of Hitoshi's length.

The tentacles slowly loosened their grip, now that he was ready to be fertilized. His teeth came away from Hitoshi's neck with a whine. "Where's the knot?"

Not knowing what Denki was talking about, but too focused on his pleasure Hitoshi simply tilted his head to the side as he looked down at the wrecked whining blonde beneath him.

"Knot!" He let out another whine that pushed Hitoshi over the edge, filling him with his cum as deep as he could. As he pulled out Denki whined again.
"No!" He pulled him closer again, keeping them together. "We have to stay like this."

"O-oh." Hitoshi tried to catch his breath. "Ok." Unsure what to do, but feeling the distress from Denki, Hitoshi wrapped his arms around Denki, the two of them sinking back into the tub.
"Hey." Denki whispered.
"What's up?"

"You still...won't tell anyone about me...will you?" His slender finger traced around the fresh bite mark on Hitoshi's neck.
"Hm? No. Even if I wanted to no one would believe me."

"Good." Denki happily chirped, snuggling into Hitoshi. "I like you. You're a good mate." He continued making happy chirping noises.

Nearly a year passed after that, Hitoshi kept coming back to the same area in hopes of seeing Denki but never had luck. Before Denki went back to the sea he said he wanted to continue seeing Hitoshi, so he was beginning to get worried.

Until one day while he was just out watching the endless sea he finally saw Denki pop up, looking down at a small bundle in his arms, cooing.
"That's your Daddy, Kaiya." He smiled, looking up from the small baby Mer in his arms.

Fin

This was my first time actually writing a Mer fic and I really liked it?! I've been wanting to do it for awhile, but certain things kept me from doing it. I'm glad I was able to work past that and get this done! As always QRTS, likes and DMs mean so much to me!

Also! Please check out this AMAZING art @BeeTrashy did of Denki https://twitter.com/BeeTrashy/status/1263552471001182208?s=19