The Ereri Project!

Fish (Mermaid)

A/N: Tentacle Dicks... That's all.

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Eren hates mating season.

All the other guys go all gaga over which girl's eggs they want to fertilize and all the girls get to sit and watch the whole catastrophe like they're the masters of the universe.

Eren thinks absently that it's probably a good thing merwomen adapted to only having one child at a time every five years because if they had children like the other fish had children there would be way too many of them.

And anyway, Eren has never been interested in the lady fish.

He's heard that there are other merfolks like him, men and women who aren't interested in the opposite sex, but they used to be very uncommon.

That said, there have been several to pair off from the group of young when he was a child; Ymir and Historia, Berthoult and Reiner, and when Jean and Marco disappeared earlier this year everyone assumed they went off to be alone together.

Which left Eren kind of alone in that sense.

The only time he ever left their pod was during mating season (because fuck the females were annoying when they were ready to be mated) and there usually weren't many others around when he did.

So he explored. He wants to go up to the surface but he doesn't think he can swim away that fast today if a land-walker spots him.

He just swims, wherever the tide takes him is fine, he just wants to ignore how lonely he feels. But then, through the water, he spots something.

Turquoise and shimmering. It's bigger than the fish he usually sees around here so he swims up to get a closer look. His eyes widen, it's another merman.

He's swimming slowly, like he's just looking for something to do. Eren smiles and gets closer, intending to say hello when he turns and locks eyes with Eren.

The pink-tailed merman freezes and stares at the man with the turquoise tail.

He's beautiful.

Eren can't explain it, but it's the first time in he's ever needed to be near someone.

The man swims up to Eren and takes his hands.

Eren doesn't realize right away because his eyes are still locked with the other man's, but they're swimming in a circle together, not unlike the mating dance Eren has seen the others do back home.

He smiles and leans in to press his forehead against the other man's. "I'm Eren," he says quietly.

"Levi," the merman with the turquoise tail replies.

They continued spinning and Levi leans in to kiss Eren, who blushes when his tentacle starts creeping out. "I'm sorry," he says. "It never-"

"Shh," Levi replies, taking his hands from Eren's and resting them on the brunette's waist as his own tentacle snakes out and twists with Eren's.

"Ah~" Eren moans at the contact.

The lengthy appendages twist and writhe around each other as the young men pull each other closer, smashing their mouths together roughly.

A hot feeling coils tighter and tighter inside Eren until he doesn't know what to do with himself. "Ngh~ Levi, I-"

"Just let go, love," Levi replies, kissing him again.

Suddenly, as though he'd been struck by lightning, Eren tenses and he experiences the single greatest feeling he's ever felt, hot and relieved and like his blood is rushing.

His tentacle spirts think white fluid, going way too sensitive. Levi's arm's tightening around him as his own tentacle does the same.

Eren holds onto Levi tightly, both of them almost completely still as their tentacles untangle and retreat back inside their bodies.

Levi leans his head on Eren's shoulder. "I really fucking hope you aren't a jerk," Levi says.

Eren chuckles. "Why?"

"We're mates now, duh."

Eren blushes and shoves his face in Levi's shoulder. "Yeah," he says, smiling. "We are."