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How Captain Erwin Found His Mate

Summary:

Captain Erwin picked up a stray black cat from the underground.
Not that he knew, but that cat was also spreading his hole for him too.

Fate has its way of doing things.

Notes:

Yes, you read it right. Captain Erwin. Not Commander Erwin. This is set slightly after ACWNR but before Erwin becomes the commander.
I hope you enjoy this, lovely Emmie. I tried my best.

I also had to take break from writing because of how horny I get. The images in my head are WAYYY better than what I wrote down.

(See the end of the work for more notes.)

Work Text:

Maybe Levi was too arrogant but he might have underestimated his body more than he thought. Curse this gender and curse this stupid need to be bred. And frankly, it only got worse when Erwin picked him up from the underground like the stray cat that he is.  

 

At first, the medicine worked fine. Levi smuggled enough from one of the supply carts that the merchant rolled down, to which he sold for an upheaval of prices compared to the original. He always brought it with him inside a little pouch and completely masked his scent. His sweet, minty-tea leaf with a slight infusion of fruit scent were experienced by no one but Levi himself alone. Even Farlan didn’t know he was an Omega until the blonde caught him drinking the meds one day by chance. But all of that changed when he stepped onto the land of the sunlight above. 

 

His habits didn’t change, neither did his meds. In fact, it was easier to obtain suppressants now with his self-earned salary as a Survey Corps soldier. He no longer needed to rely on the uncertainty of robbery from the rich merchants, but rather, constant prescriptions that he could pick up every month or so from an actual pharmacy. This was one of the privileges that he enjoyed the most, besides the black tea that Erwin smuggled for him from the military police. 

 

That’s right. Things have changed ever since that guy appeared. It was Erwin Smith, the Alpha leader of the Survey Corps. It wasn’t just because he brought Levi out of the underground; his existence is what made Levi changed, emotionally and physically. 

 

“It’s not working again…” Levi thought, trying to wipe away his sweat underneath his hair. The droplets slowly ran down his undercut. His cravat was drenched despite it being in the middle of winter. His body was the fireplace itself. Levi walked slower, making sure that everyone walked ahead of him before taking a sniff of himself to ensure none of his scent was leaking like fish bait. There were many Alphas around him; it was too dangerous to be exposed. Erwin, Mike, and Hanji were the prime examples and they were way too close to him as friends for his comfort. He hoped they never realized considering they never asked and assumed that he’s an Alpha due to his personality. But alas…

 

“What do you want?” Levi growled as he stopped during his tracks, noticing a firm grip on his shoulder. It was Erwin’s (big, Alpha) hand. Others glanced back to question the sudden situation. But Erwin dismissed them with that fake, charming leader's smile of his. It made Levi sick. So seductive, tempting, and so…erotic. As if that smile was not enough, Erwin looked back at him with an alluring gaze; like an Alpha who captured its Omega prey. Levi couldn’t stop staring at Erwin’s lips, wanting to steal a kiss to ease his desires. 

 

“You…Levi…” Erwin finally spoke after seemingly a long minute of waiting. His scrutiny at Levi’s pathetic figure made the Ackerman feel weak and small. 

 

“Wha-” That’s when it hit Levi: the smell. More specifically, Erwin’s smell. 

 

“You smell like mint tea.” Erwin confessed and stared down at the Omega he just exposed. The blond captain hastily turned back to the other Alpha friends of his to confirm that he wasn’t hallucinating. But it seems like others didn’t notice at all as he expected since no one reacted or spoke a word like Erwin did. 

 

“And you smell like...like an old man soap that you are.” Levi retorted with his blushing face, clearly avoiding Erwin’s gaze. Erwin’s musky mountain and pine tree scent with a hint of cinnamon made him want to curl up like a racoon inside a nest after being bred-

 

Wait a minute.

 

Levi can smell Erwin when no one else does. Erwin can smell Levi when no one does, especially when he’s an Omega.

 

“You…you are an Omega…I assumed…” Erwin blinked as he felt the first bead of sweat running down his neck, threatening to dampen his clothes. “Did you not take a suppressant for this cycle? But then…no one noticed you…”

 

“I DID, ASSHOLE!” Levi hissed at him, which prompted Erwin to shush him by covering Levi’s mouth (“Fuck, his lips are soft” Erwin thought) to avoid any commotion. Levi would not appreciate it if his identity was exposed in a situation like this; not when he was just barely getting away after hiding it for a month ever since Erwin kidnapped- no, invited him to join the troop. Walking to Erwin’s bedroom nearby, the captain carried him on his shoulder like a sack of potatoes despite Levi’s squirming to break loose. “What the fuck are you doing?!?”

 

“We cannot talk about it out here. People can hear.” The captain whispered while ensuring the area was empty of cadets. “Did the medication fail? Has this happened before? We can get better medication if the one you used didn’t work. Why did you hide-”

 

“You talk too much, blondie. My medication always worked until now.” Levi let out a long, questioning sigh after Erwin settled him down on the bed. Erwin’s bed smelled like him- like a good fucking nest to be cuddle in and to be bred in- 

 

“Why do I just keep thinking about breeding??” Levi mentally cursed. 

 

“Of course I have to hide, are you dense?” Levi regained his composure and took off his cravat. Unknowingly to him, that was another arousing thing to do in Erwin’s eyes. “If anyone knows that I am an Omega…all of my efforts until now would be wasted. I am not some bitch in heat.”

 

“T-That’s right, I apologize.” Erwin coughed, feeling the heat as he spoke. “But, still. It doesn’t make sense how no one noticed your scent. Considering you are still taking medicine, I assume you don’t have a mate just yet…then why…?” The captain tried to think of the possible reasons. Or, forced himself to think so he can ignore the obvious signs of rut invading every nerve he had. The temptation was intimidating as it threatened Erwin to make a move and make the Omega his; to rub his scents all over and mark Levi on the nape. “Y-you also said your medication never failed? Do you know any possible reason as to why-”

 

“Because of YOU.” Levi pointed at the Alpha. If a glare could kill, Erwin’s neck would have been separated from his body. “Ever since you appeared in my life, everything is fucked from top to bottom! Even the things that I depended on the most to keep my dignity are now failing on me! Even Isabel…and Farlan…” Emotions were consuming Levi. The need to be taken care of was greater than ever. “Yet…I fucking followed you…”

 

Levi reached out to grip Erwin’s military uniform and clenched tightly. “So…are you going to take…responsibility or not…?”

 

“W-What responsibility-”

 

“Don’t play a fool. You are fucking sweating. Your cock is hard. You have been eyeing me like a piece of meat you just hunted down. Doesn’t fucking help when you are currently the only Alpha that can smell me when no one else ever had in my life. I know for a fact that you don’t have a mate yet.” Levi moaned erotically as the white shirt brushed over his erect nipples when he tried to take it off his body. He was prepared to be taken by this man. “Don’t tell me you don’t know-”

 

“I do know what…a destined mate is. And the signs.” Erwin completed the sentence for Levi, staring down at the Omega’s body. His Omega. “But…such things, destinies should be chosen. Not given. You should have the freedom to- God…Levi…” Erwin had to stop himself from speaking in order to admire the sight of Levi’s figure. The perky pink buds, the slick that dampen the khaki pants, the smells of temptation, and more. 

 

“Fuck off with your poetic bullshit.” Grabbing Erwin’s collar, Levi hastily shut him up with a kiss. Erwin’s patience exploded. “I picked the choice to follow you. And you picked me from the underground without knowing I am an Omega. Isn’t that enough?”

 

Erwin couldn’t take it anymore.

 


 

The smell of Erwin’s room was no longer filled with old book pages or rotting wood; it was the mixture of mint tea, wild cinnamon and forest pine trees. One could imagine themselves having a picnic, sipping on delicious tea while enjoying the scent of wild nature in peace. But instead of silence, the moans of two men were echoing throughout the room, desperately trying to fulfill each other’s biological needs. 

 

“G-God…Erwin…deeper-” 

 

“I don’t want to hurt you.” Erwin tried, he really did. But despite his words, he continued to hit deeper into Levi’s small body. His inside was so tight; it was clutching onto Erwin’s member as if begging to squeeze Erwin dry. The captain understands that he cannot knot Levi. They are not in the position to be parents right now, destined mate or not. The question is how will he refrain from doing so.

 

“Fuck, I don’t care about being hurt…just…” Levi greedily pulled Erwin closer, wanting that big cock to slam into his insides. Spreading his legs wider, Levi arched his back to be blessed with more of the friction Erwin was giving him. Levi itched for Erwin’s bite on his nape; to make Levi his and that Levi will only crave for this big cock. He wanted to monopolize Erwin, so badly. “Inside…more…into my belly-”

 

“Fuck, don’t tempt me like that…You know we cannot…” 

 

“We can…please?” This was the first time Levi looked so pathetic in front of someone. He will NOT be rejected like this. Especially not when he finally found his mate. “I…I've taken suppressants ever since I knew of my gender…and it acted as birth control too…I think…” 

 

“You are taking the Roseir brand, I assume?”

 

“You know- Ah! - a lot…about these Omega’s matter.” 

 

“I researched.” Erwin took in a deep breath as he pulled his dampened hair back with his left hand; right hand continued to hold his mate’s thigh. “An Alpha like me…Well, I am careful. But I certainly…didn’t expect this.”

 

Levi helped Erwin by lifting his own thighs up so the Alpha can exert all of his energy into breeding him. He had fingered himself before, had fucked himself with dildos before. None of them were tantamount to the pleasure Erwin was giving him right now. Free from holding Levi’s legs, Erwin leaned down and dug his Alpha male cock further; he was so sure that he touched Levi’s Omega womb. The dirty squelching sound of sex and slick was driving Erwin’s animalistic side mad. 

Noticing that Levi was feeling a bit uncomfortable from the position, Erwin stopped (much to Levi’s dismay) and turned his Omega over onto all fours. Levi barely got the time to question the new embarrassing position he was subjected to, Erwin rammed into his mate in one thrust. Levi’s inside had remembered his shape now; it was loosening up for Erwin so nicely. Then round two, he went. Inside and out, quick and rough, greedily and hungrily. The Omega’s cum and slick trickled down onto the mattress from the newfound pleasure. The usual Levi would never forgive the dirty sheets and the unkempt pillows. Yet, this was now a perfect nest for a couple to mate. 

 

Levi’s neck was now visible to Erwin. The scent glands were emitting the most seductive smell, pulling Erwin closer as if making him claim the mate. He licked the skin softly, not stopping the brutal motion below. Levi’s moans were Christmas carols to his ears and his smells were drugs to his system. 

 

“It’s okay…” Levi used the rest of his energy to spell out the obvious. “Make me yours, Alpha…”

 

And with just that confirmation, Erwin sunk his teeth into his mate’s soft nape. Noticing that Levi was biting his lips to refrain from screaming, Erwin allowed him to bite his hand. The bond was accepted without fail as they felt their scents mixed together like a successful witch’s concoction. This smell was their love potion. 

 

Levi suddenly felt warmth inside when Erwin released his seeds. “I’m…I’m all yours…” He sighed out with a satisfied moan, only to be hindered when his ass stretched for Erwin’s big knot. It seems like they will have to stay like that for a while until that knot subsided. “God, why are you so big…?”

 

“Are you hurt?” Erwin questioned, still caring and gentle after being so harsh during their session. Sensing that guilt, Levi eased his Alpha by shaking his head. Even so, that didn’t seem to make Erwin any less worried. 

 

“I am okay…I just need to breathe.”

 

“I would have gotten you some water but…” Erwin knew he would tear Levi to the point of bleeding if he pulled out now. Both of them did not expect this out-of-place mating session. Destined mate sure was something else. And both of them jumped into the action without thinking twice about it. 

 

“I’m not that thirsty, don’t worry.” Levi shook his head. “It just…are you okay with this? I technically kinda…seduced you into it.”

 

“Levi, no! I-” Erwin pushed himself up, causing Levi to wince since the knot was moving inside of him. It was so big; Levi was sure that his insides were nothing but scrambled eggs at this point. “Sorry sorry- I mean- I chose this.” Erwin softly lowered himself “I wanted to. With you.”

 

“...” Levi was sure the heat was gone now. But his face felt hot. 

 


 

Upon agreeing that they would talk about it later, Erwin pulled Levi closer into a hug and quickly fell into his nap. It was exhausting for him, too. Levi stayed awake, listening to Erwin’s heartbeats and slow, soft breaths. The cuddling wasn’t unpleasant, even though Levi hated physical contact from others. This wasn’t too bad at all, Levi thought. 

 

“Wouldn’t mind being with this guy for the rest of my life but…is his knot always going to be this big??”

 

Levi’s struggles will never end, it seems. 

Notes:

After Erwin got promoted to Commander, Levi proudly announced himself as "commander's mate".
That title is less stressful than "humanity's strongest" of you ask me.

Lol.