Immer: I don't seem to have any luck with SnK (AoT), so I don't understand why I keep trying. But here's attempt number 3.

Disclaimer: Do I look like the creator of Shingeki No Kyojin to you? No? Okay, enough said.

Chapter title based off of Black Black Heart by David Usher. Story title is of course Crazy In Love by Sofia Karlberg. Don't judge me using a song for a movie and book franchise I despise.

Chapter One Rotten To The Core

WIRSINDDERJAGER

"You want me to do what?" Captain Levi was ever rarely caught off guard. He stared up at his commanding officer with a stoic expression, but his eyes expressed the shock that he felt.

"You have a specialty to make people feel special. I know this is unethical, but I can't think of anyone else for this job." Erwin said with a straight face.

"Stop sugar coating. Just tell me what the pigs want." In other words, shut up and get straight to the point.

"The higher ups want to be assured we can control the titan, Eren Jaeger. Someone came up with an idea to stage a fake relationship and now that's what they want from us."

"So you're saying they don't trust my abilities as Humanity's Strongest?" He narrowed his eyes.

"Of course they do. But it's what they want. And unfortunately, my hands are tied on this one. It was one of the conditions they briefed me on in return to having custody over him." Erwin shrugged as he crossed his arms.

"And you want me to manipulate some brat's heart like that?" Levi was having a hard time wrapping his mind around this.

I beat the shit out of him in front of the entire court to sway them in our favor. That's not something to start a relationship over, even if he understood it was all an act.

However, it wouldn't be just as weird as whatever was between him and Erwin. Shortly after Levi had been taken into the Survey Corp, things were complicated. Levi hated him, wanted to kill him even. After losing his friends, Levi gave up and surrendered all faith over to the blonde. A short time later, Erwin was named commander when Shardis stepped down.

After their first expedition under Erwin's command was the first time the blonde tested the trust. Levi had been shaken at first, baffled as to why he was the one being subjected to being fucked by Erwin. But once assured he had to get it out of his system to better deal with the loss, Levi allowed it to continue.

It became a ritual between them. It wasn't anything romantic, just a ritual based on unbreakable trust. They were both responsible adults, and having needs and desires were normal. Neither sought anything more than that. Somehow this solidified the trust shared between them, to the point they understood each other on much deeper levels than anyone else allowed.

But this is beyond fucked up.

Having casual sex with Erwin? Great. He let the other initiate everything. This all started because of Erwin, so it made sense he called all the shots whether or not they had sex. Levi wouldn't give a damned whether or not they did it now or wait until after the next expedition outside of the wall.

But Eren? A brat, who was barely half of his own age? He knew nothing of the ways of pleasure, or not allow the heart to fall. Worst of all Levi would have to manipulate him into a fake relationship for the whim of the higher ups. Eren might be considered a monster, but even that would be too cruel.

"Just for a while. It doesn't have to be long term. Just long enough until we prove it is best to make full use of him to take back Wall Maria." Erwin spoke so casually, that this almost bothered the captain.

Almost.

"How exactly am I going to initiate such a thing? He's a brat." Levi wasn't agreeing, but he wasn't refusing, either.

"What are your types? If he fits the requirements, then you shouldn't have a problem."

"Look at in a mirror, Eyebrows."

"So people who are taller than you by a considerable height? Well, he is tall. And he probably has more growth to go, yet." Erwin was having way too much fun with this.

Damn. He's already figured one of my interests.

"And eyes. I have to be drawn to the eyes." Levi confessed, grimacing at himself for the admission.

"Well, he does have the eyes of a beast, doesn't he? Wild and free, despite being caged. What else? Plus, if I remember correctly after I started fucking you, you've opened up partnerships to a few others for casual sex. I've known about those for a while, now."

Erwin you bastard.

"You just want to turn me into the Survey Corp's slut, don't you?" Levi deadpanned, earning a chuckle.

"If you refuse, I could always ask Hange."

Levi's eyebrow twitched as he resisted the urge to shudder at the mention of their name. Out of everyone, that was Erwin's second choice? That was the worst idea ever, especially coming from the man who had a brilliant mind for strategies.

"...I'll trust you. Now how am I supposed to initiate such a thing with the brat?" Levi sighed, while a part of him thought this was a horrible idea to begin with, he figured Erwin saw something in him that he didn't.

"That is for you to figure out on your own. I expect to see results soon. Oh, and Levi?" Erwin had made to leave but paused to look back with a wicked glint in his eye. "The rituals won't stop because of this. And he can't know of it."

Of fucking course. Go figure.

"Why would I jeapordize you like that?"

"Good. Have a good night, captain."

When the door closed Levi began to punch his pillow.

WIRSINDDERJAGER

What did I get myself into?

Levi questioned his sanity as they spent two days cleaning the castle that was to be served as their new headquarters. On the second day, the captain intently watched Eren work. The brat was nervous whenever he was around. And while it pleased a sick part of him, Levi was supposed to be figuring out how to start a so called fake relationship.

He's clumsy and loud. He might have endless energy and eagerness to please, but he doesn't know self control.

However, he got to observe the kid without hardly anyone around to judge him. With just them and his squad here, Levi was free to stare in between cleaning sessions. All this did was make Eren nervous, and he couldn't blame him. But there was another idea, one where he would have a better grasp of understanding him.

"Oi. Tomorrow, we start training. I want to see for myself how you are."

"O-okay!" Eren nodded, flashing a grin at the thought of training. He was excited to train with the Scouts, at least.

"I want you at your best tomorrow morning. No more of this kicked puppy, nonsense. Got it?"

"Y-Yes, sir!"

"Cut the sir. Just call me captain."

"Yes, sir - I mean captain!"

"We set to the training grounds at dawn." And with that Levi turned and continued on his conquest over the disgusting cobwebs and thick layers of dust.

The next morning as the sun rose, Levi was waiting by the designated area they had chosen for training. There weren't any titan dummies yet, but that wasn't his focus for this training. He was testing Eren's stamina, speed, endurance, and most critical his ability to handle pressure.

He was the first to arrive, and he waited for everyone. He didn't have to wait long, much to his relief. His squad knew never to keep him waiting for long, and Eren was bright and eager at this hour. The excitement must have bubbled up from the previous day, as he was grinning and didn't stammer when he greeted him.

"Morning, captain. So what's the training session going to be about, today?" Eren beamed at him.

He must have taken the kicked puppy thing to heart. And I was only joking.

"First, we'll start with warm up drills. I want to see you launch into the air in different scenarios. Then from there as a group we test your speed, stamina, and endurance." Levi intentionally left out the last detail, this was something he always did to new members of his squad.

Petra sent him a worrying look. She knew better than to voice her concerns, but her eyes said it all. Petra was asking him to take it easy on the brat. Levi decided that it all depended on Eren's performances. As well as his attitude. Weak attitudes would have to be stomped down and rebuild. But he guessed he wouldn't have to worry about that part with Eren.

For the next half hour, Eren did rather well. He followed orders best he could, and he was open minded to criticism and other suggestions to perfect a maneuver. After the drills he still had endless amount of energy, and Levi wondered if it had something to do about him being a titan.

It would be something to discuss with Hange, later.

The thought of discussing about titans with Hange made him cringe. But it was inevitable, since they had to learn as much as possible about Eren. Anything and everything they learn was significant. Since little was known about titans, any information was vital at this point. Especially if Erwin's assumption about the Amored and Colossal Titans were correct.

When it was time for the actual test, Eren exceeded expectations. Despite his lack of experience compared to the squad, he managed to keep up to their top speed. What he lacked in stamina, he made up for with endurance. Levi knew how to work on his stamina, all he had to do was one on one sessions and drill into his head to save his strength instead of burning it all in one go.

Anything can happen outside the wall. I have seen too many die because they don't know how to save their strength when they needed it.

And so the first lesson in stamina became the focus. This was the angle he needed to see how Eren did under immense pressure. He glanced back to see the brat was exhausted. Sweat gathered on his forehead and chest, his movements were a little sluggish compared to before. But despite the strain there was determination in those eyes.

Eyes that I can drown in.

Levi could admit to himself the first attribute that caught his attention about Eren were his eyes. Back in the dungeon where the Military Police kept him, his eyes were wild like a monster's. But the driving need to eliminate all titans drew him in. And under better lighting later, Levi rather liked the color of them, too.

Makes it a little easier, I guess.

But what bothered him was how honest Eren was with him. And Levi was expected to face him everyday with that unshakable honesty and lie to his face? The captain felt a little fucked up about this, he wasn't even sure if he could pull it off.

But I agreed to this. So it has to be done.

"Eren, if you feel like you need to, then say you've had enough. This is a test on you, therefore you call the shots if you can't continue." Levi stated, eyes watching for his reaction.

He was starting to worry about Eren's determination driving him into exhaustion. His breathing was erratic, and yet he didn't slow down. Levi was now considering he would have to work on more than just the kid's stamina. And the flash in Eren's eyes didn't calm his concerns.

Shit. His spirit is so intent he is willing to work himself to death.

In his distraction Levi had missed a trunk of a tree. The other grappling hook was tugged as he passed it and his weight and speed broke the branch before he had time to aim again. Levi grit his teeth in annoyance when he pulled the triggers, but they were jammed. He instinctively turned so his back faced the ground as he fell and braced himself for impact.

"Captain!" His squad exclaimed in unison, scrambling to turn around for his aid. But they wouldn't be able to make it, they were already too far away.

Then someone caught him. Arms wrapped protectively around him, forcing his face to be buried into a sweaty shoulder. The pair clung onto each other as they collided to the ground and rolled several feet. When they stopped Levi was on top, and he pushed himself up to see the face, taken aback.

"You didn't have to do that, Eren. I have fallen enough times in my life. I would have been fine. Bruised and possible broken ribs, but fine." Levi stated as the others landed on the ground.

"Captain, Eren! You guys all right? Nothing broken?" Petra was in mother hen mode.

"I think we're fine." Levi replied, only to twitch in annoyance.

Out of all times, he gets a hard on now?

"Captain, I did that because I can't help it. When I see someone in trouble, I rush in without thinking. And...I'm sorry." Eren stammered, face flushing bright red in embarrassment.

What a gentleman. He has the sense to apologize for his dick, at least. Oh, shit.

Levi could feel his own responding to the hard length underneath him. The captain hissed as he forced back his urge to rub and rut against the titan shifter. His own squad were surrounding them, now wasn't the time nor place.

"You sure nothing is wrong? You're not exactly moving." Eld voiced his concern.

"I'm fine, he's fine. Give us a minute." Levi snarled, his mind racing.

Why is being this close doing things to me? I hate sweat, but the smell and feel of him is turning me on.

Levi never felt this with Erwin. After nearly five years, the captain only craved him out of familiarity. And plus Erwin was the only person he trusted so deeply to see him in compromising positions fully nude. The commander knew how to turn him on like second nature. Eren isn't even trying and Levi is turned on by simple sweat, something he loathed.

"Hey! Eren is getting a hard on! Eren is - " Oluo bit his tongue, saving both the titan shifter and Levi more embarrassment. Eren buried his face into the captain's shoulder, and Levi felt compelled to protect him.

"Need a moment, captain?" Eld remained professional.

Thank heavens. I owe him a beer next chance I get.

"Yes. In fact, we're done for today. Head back and start your chores. And don't speak a word of this to anyone, understand?" He glared at them, feeling proud at their flinches, bodies tensing up.

"You got it, captain!" Petra assured, in between excitement and worry.

"What do we tell Hange?" Eld knew how to stay one step ahead, which the captain was grateful for, as he hadn't thought of the titan fanatic.

"I'm doing a one on one training session." Levi ignored the snorting from Oluo and Gunther.

"All right. Don't break the lad, captain." Eld chuckled at his own joke. To him the glare he received was so worth it.

When they took to the air and left, Levi then turned his focus on Eren. He opened his mouth to speak but was cut off when suddenly hands gripped his hips tightly, tight enough to bruise. But in the heat of the moment Levi didn't care as Eren rutted against him fervently.

"Eren...shit...calm down!" Levi growled, but didn't have the strength to take control of the situation.

"I'm sorry, captain. I can't help it. You feel so good. I want...I want..." Eren gasped out, arching his back like a taut bow.

Levi was equally as lost in the throes of passion. For years all his body knew was Erwin. Eren was someone new, something to explore and learn new territory and he found it exciting. He knew this was a contradiction from his hesitation to take up the job placed upon his shoulders earlier, but now he found himself mewling and squirming against Eren with desperate need.

"Eren..." Levi gasped, it was the only warning he gave before his body tensed and he cried out in his release.

Eren watched in delight, drinking in the sight of the usually stoic man so open in his pleasure. He wrapped his arms around the petite form as Levi collapsed, body shaking from the intensity of his release. His breathing was erratic, and it took him a moment to regain his breath.

"You're still hard." Levi could still feel him throbbing against his hip.

"I'll be okay. I'm just glad you found your release, captain." Eren was happy to make others feel good, even if he sacrificed his own.

I'm not that cynical.

Levi experimentally felt the hardness through the pants. He groaned at the feel of it. It was a decent length, not as long as Erwin's but enough to fill him. And Eren was thicker, meaning he would stretch him in ways Erwin wouldn't be able to. The thought sent shivers down his spine, and Levi found himself eager for a taste.

"I don't leave my partners hanging. Get ready, you're in for a treat. I don't normally do this, but I crave it. If you protest, I'll bite it off." Levi sent a devilish glint at Eren.

Before the titan shifter could respond Levi scooted down. He pulled the apron up and with skillful hands undid the belt and pants. Due to the straps of the uniform and gear, he couldn't pull the pants down far. But he managed to pull them far enough to free the already glistening cock.

It was leaking precum, already close to release. Since he was so close Levi skipped the foreplay and dove right in. He relaxed his jaw and throat as he took as much as he could, tasting him. He heard Eren cry out his name, gasping and squirming. Levi gripped the base and began to move. Hands gripped his hair and he groaned at the pain. He had always been masochist anyway.

"Captain...captain! Ah! Levi! Oh God Levi - I'm gonna - I'm...!" Eren wailed as he came.

Levi stilled, at first disgusted. But damn it all the taste made it easier for him to swallow. And like Erwin, the brat had a few more loads in one release and Levi loved it. He greedily sucked as Eren weakly thrusted into his mouth.

When he was finally spent and softening, Levi pulled away. Eren glanced down and felt his heart leap at the sight of the captain licking his lips, eyes still glazed over with lust. Eren knew that if he died at this moment, he would die very happy and lucky man.

"Eren. Don't tell anyone about this. I don't do relationships. However, I don't mind acts of pleasure. In fact, I crave it. So if you're willing, how about being my new partner?" Levi spoke gently. "I have rules you have to abide by, if you agree."

I found my angle, Erwin.

Levi watched Eren as he gathered his thoughts. He debated, which was a good thing in his book. It meant Eren was taking a step back to evaluate the situation. Already the training improved some progress in him. Levi pulled himself away to give Eren some space. He grimaced as he remembered that his pants were damp from his release.

Gross. A bath and change of clothes are in order when we get back.

Eren sat up, eyes following Levi's. Once again the captain found himself drowning in them. And with silent horror he realized why those eyes drew him in aside from the honest emotions shown through. They were so much like hers, and he felt his heart weaken at remembering her.

"What are the rules?" Eren was hooked.

"You don't brag to anyone. Or tell. I call the shots when we do it. If you really need it though, you can convince me. But ultimately it's my decision. And you have to be comfortable with sharing me."

Eren's eyes flashed at that. His body tense. By his reaction Levi cursed himself, his guess about him was correct. Eren was too young to not let emotions get in the way of just casual sex. And to make it worse the captain very might be his first in any sexual deeds.

"I am not in a romantic relationship with anyone. But only a selective few are allowed to be my partners. You're the first in a while that I've made the offer. So consider yourself special." In truth, Eren was, and he didn't know how big of a step Levi was taking for him.

"I only make this offer to people who catch my eye and have my complete trust. I don't hand over my body on a whim. You could say I'm picky when I choose my partners, which I am. You meet all the requirements, and I enjoyed the spur of the moment acts of passion we just had."

"...How many partners do you have?" Eren bit his lip, feeling encouraged by his words to learn what exactly he was getting into.

"You think I'm a slut, don't you? I won't mention names, but currently one person. Another is on and off, so you can guess that one doesn't happen often enough to be considered a partner." He wasn't going to jeapordize anyone over a stupid sex scandal.

Especially Erwin. He would be stripped of his status and very likely discharged from the military. Humanity needs his brilliant mind.

"...Are there more rules?" Eren inquired, still hesitant. Levi was patient, he understood why. At least the brat was keeping an open mind about this, which showed his maturity level.

I'm guessing he's hesitant because he's possessive by nature. He knows it, and he knows it puts him at a disadvantage to anyone else I'm fucking in comparison.

"Don't ask me who my partners are or were. Don't ask who I've done it with. If I sense you're falling for me, I'll end the partnership without a second thought. I don't do relationships. Remember this is all to fulfill sexual needs on both ends. I make it fair for all of my partners, so don't ever start thinking I'm giving anyone special treatment. That just leads to unnecessary conflict and tension."

In our line of work there can't be personal feuds. Anger, sorrow and conflicts of the heart end in death.

After a long moment of considering, Eren nodded. Levi sighed in relief. He hadn't meant for it to come to this, but the captain knew he couldn't lie to those bright eyes. Plus this way he wouldn't completely break the brat's heart should things go sour. Eventually everything does when it comes down to Levi and the people around him.

"Good. Now pull your pants up. We need a bath."