Disclaimer: I don't own Shingeki no Kyojin

Author's Notes: So, I got a lot of requests to write LeviMika. But ErenMika is my OTP. And I also kinda started liking LeviEren or Riren as they call it... so yeah... judge me all you want, I now ship all of them, though ErenMika is still my preferred pairing. So I decided to just write all three of them. In one fic. Yup. OT3. And bits of them individually too.

This will be about five chapters, mainly smut though some amounts of angst/fluff/character development. The chapters will be much shorter than my usual ones too. It's just a side project to keep me occupied as Losing Control goes through its beta stages, and to keep my mind off that story because its consuming me.

Don't ask me when this happens and how it makes sense with canon, because it doesn't.

Also, unlike my other fics, I have called him Rivaille here rather than Levi. If people would rather I change that, let me know.

Warning: Rated M for sMut. Contains: LeviMika ErenMika and LeviEren. And also LeviMikaEren RivaErenMika RivaMikaEren LeviErenMika or whatever you want to call it.

But yes, eventually there will be a Levi x Mikasa x Eren threesome. This chapter is just LeviMika though, with mentions of onesided MikaEren.

Fraternization

Chapter 1: Caught

Mikasa wasn't sure when it started, and how it got that way.

She was in love with Eren, after all. She breathed, fought, lived for the boy.

And yet, here she was, pressed back against a tree, Lance Corporal Rivaille's breath hot on her ears.

His hair tickled against her forehead, two fingers hooking under her belt. He yanked her forwards so that her clothed chest brushed against his.

"Give it up," Rivaille murmured, his hands finding her wrists.

She struggled against him, but he pushed back. He was strong, frightfully so. Nobody had ever been able to restrain her before. Whenever she got into scuffles with Eren, she always shoved him off. And yet, Rivaille held her there so effortlessly.

Mikasa hated him for it.

She hated that he was stronger than her.

And she hated the fact that all of it - his strength, his contemptuous gaze as he pinned her under him, his husky, condescending voice, the way he was able to overpower her and ridicule her and find faults with her in a way that no other soldier could - turned her on ridiculously.

"Fucking chibi," Mikasa spat at him. "Get off me."

Her eyes met his, flashing angrily. It was her glare of death. Rivaille's eyes were half-lidded, bored. It was as if she had no effect on him.

Rivaille's finger skated across the skin of her wrist, leaving a burning trail. He traced up her arm, her tense muscles, to her shoulder.

It was just one finger, he was barely touching her - and yet Mikasa just wanted, so badly, wanted him to -

"Eren won't mind," Rivaille drawled. "If that's what's worrying you."

"I - I Iove Eren!" Mikasa snarled at him.

"But you want me."

He sounded so confident, self-assured, that Mikasa wanted to punch him in the face.

But she couldn't.

Instead, she let him slide a knee between her legs, his hands gripping her waist. Mikasa felt herself grow wet as his thumbs circled her hipbones, slowly, languidly.

"I would never want you," she bit out, as he rubbed at her through her white pants.

"But you're already wet," Rivaille stated. "I've barely touched you."

Mikasa had nothing to say to that, no sharp retort.

It was true.

Mikasa loved Eren with all her heart, and sometimes, when he gazed upon her tenderly with his brilliant green eyes, or let her hold his hand - she felt her stomach flutter.

But it was so - difficult, loving Eren. So emotionally draining. He was so focused on his own ambitions, and he always whined about how she suffocated him with her attention.

And even though she did love him, she was always so busy protecting him, taking care of him.

There was a certain thrill to being with a man that didn't need her protection, a man that was stronger than her. A man more experienced than her, who could get under her skin, and probably kill her if she wanted.

Mikasa had always been overly strong, outclassing everyone else. And yet, Lance Corporal Rivaille outclassed her.

And more than anything, she was inexperienced. She had never experienced a man's touch. All she experienced was the emotional emptiness that came from loving Eren, and receiving nothing in return. She knew Eren would come to her eventually. But till then, as much as she tried to hide it, it was frustrating, unfulfilling.

And Rivaille knew this.

Mikasa gasped, as his hot tongue traced against of her ear. He nipped down against her skin, his hands sliding across to the inside of her thigh.

"Heichou -"

It came out as a gasp, even though she didn't mean it to.

"Stop denying it, Mikasa."

His voice was low, husky, and it sent chills down her spine. His lips moved down to her neck, as his hands parted her legs.

"You may be in love with Eren, but you're wet for me. You'd probably rather kiss him than kiss me, but it's my dick you want shoved into you, not his."

Mikasa's cheeks flushed red, though his crass words turned her on more than anything.

Rivaille lifted her up, his fingers skimming across her bottom, and ground against her. He was hard as well, and it gave her a deep satisfaction.

Mikasa wrapped her legs around him, digging her heels into his back to force him closer to her.

"This doesn't mean I despise you any less."

Rivaille smirked against her neck, amused by how acerbic her voice sounded.

"Say that to me again when I'm fucking you tonight."

Rivaille thrust against her, and she could feel him through the cloth of her pants, and she was wet, and it was a wonderful friction.

Mikasa let out a moan, and Rivaille nipped at her neck, before bringing his lips close to hers, hovering just centimeters away.

He undid the buttons of her white shirt with numb fingers - the fact that those very fingers were fingers of a killer, fingers that handled swords that had killed hundreds, no, thousands of Titans only served to turn her on more - and his hands ghosted across her stomach, her abs, up to her chest.

He undid her bra with one flick of his finger to give himself better access.

"Heichou-" she gasped, as his hands fondled her, but he shut her up by crashing his lips to hers.

It was Mikasa's first kiss, and it wasn't Eren. She had always wanted it to be Eren.

But Rivaille's lips were rough and demanding - just like him - and his teeth scraped against her bottom lip.

And he was touching her in such delightful ways that Mikasa found that she didn't mind.

"You're mine tonight," he whispered into his mouth. "I'm going to fuck you so hard that you won't be able to use your 3DMG for days without the pain, without remembering."

Mikasa felt her entire body blush at his words, his low, rough voice.

"Heichou-"

"Call me Rivaille."

He bit her lip, drawing blood, and Mikasa tugged at his silky black hair, her nails digging into his scalp.

"Rivaille."

She liked the way it rolled off her tongue.

Rivaille's hands went to her pants, flicking the button open.

"What are you -"

"It's just a taste of what you'll get tonight," he told her, sliding a hand into her.

Mikasa cried out loud then, as he rubbed her with his fingers.

"You're wetter than I thought. You're not going to last long this way."

He sounded almost condescending, and amidst the pleasure, Mikasa felt a surge of irritation.

I'll show him.

It eventually became a habit.

The Lance Corporal treated her neutrally in public, maintaing a cold, calm disposition. But sometimes, he would grab her scarf in an empty corridor, and pull her in for a kiss.

Sometimes he would summon her to his office, and that's when things would get more serious.

He was always the same - teasing, condescending, patronizing - and with experience, she had gradually learned how to maintain control of her expression, of her voice.

She didn't give in to him so easily anymore. There was something thrilling about it, every time they had sex.

Of course, the sex was fantastic. They were both ridiculously athletic, with a lot of stamina, and using the 3DMG really toned the muscles.

But it was always what led up to the sex which excited her more. It was like a game - seeing who would give in first, seeing who was more affected by the other.

They always battled for dominance regarding who topped. Mikasa found that she would top one time out of four, but a part of her wondered whether it was because she really was able to overpower him, or because he let her.

"I like it when you ride me," he had told her once, his hands skimming over her bottom.

She had rode him hard that night, so hard that even he was panting and cursing at the end of it.

"Fuck, Mikasa. Fuck. You're fucking good. Do that again."

There was no emotion involved, or at least Mikasa didn't think so. It was good exercise though, and sometimes the positions Rivaille put her in were better practice in endurance and flexibility than 3DMG.

It happened two months after they had started their sick routine.

Mikasa was in Rivaille's office, clad in nothing but her pants, boots, and her 3DMG belts. He had left them on, even the ones that crossed across her chest.

It was some kind of fetish of his, she had guessed.

His state of undress mirrored hers, and Mikasa was running her hands over his gloriously toned chest, trying not to admire it too obviously as she sat on his lap, straddling him.

Rivaille, of course, caught it.

"Stop gaping so much," he told her, squeezing her breasts.

He leaned forwards to slide his tongue into her mouth, and she bit him.

"Bitch," Rivaille cursed.

Mikasa smirked, pulling on his neck to bring him back into the kiss. He kissed her forcefully, before pulling her way and dipping his head down to her chest.

"Oh - oh -" Mikasa shut her eyes in ecstasy, pulling at his hair as his tongue swirled around her and he sucked.

It was at that moment, that the door creaked. Mikasa's eyes flew open, only to meet the wide, shocked, emerald gaze of one Eren Jaeger.

Author's Note: Whoopsies. They should have locked that door. What will happen next? Please leave me a review and let me know what you think. I know, I know, I'm quite depraved.

Also, please note that this isn't going to be like my usual fics, and Eren and Mikasa will both act differently given the nature of this story. If anyone is interested in just ErenMika, check out my other stuff, I have smut, fluff and adventure too. If you want to read another LeviMikaEren (shameless self promotion) check out my fic The King, the Queen and the Ace.

Till then, please review and let me know if you like it! Is it worth continuing? I have another chapter half written and the third one planned too, so they should be up soon if all goes well.

Also, does anyone know of any good fics that ship this as an OT3? I'm surprised I haven't seen any around and I thought they would be really popular. They seem the obvious badass choice for an OT3. Also if anyone has good RiRen fic recs, let me know as well! Not the ones that are just fluff, or having him beating the crap out of Eren and getting off on it. But realistic ones with good character development, preferably not AUs. Thank you!