This story was inspired by the song "Casual Sex" by My Darkest Days. I made my own spin-off of it, of course. I don't know why but that song really makes me want to write a FanFic about my OTP. Which is, of course, Eren and Levi.

Basically, if you haven't heard the song, the singer is having a strictly sex relationship with a woman. "We're single, but we're lovers". In this story, Eren and Levi have a strictly sex relationship to recover from the loss they have encountered and are blowing off steam and relieving stress. To me that's no fun, so we're gonna make it a little more fluffy. I'm going to try to keep them in character as much as I can.

This is my first FanFic, so the response I get from this story will let me know if I am a decent writer or no, and will decide if I continue this or not. If you don't like the pairing, and if you don't like gay sex, please see yourself to the digital door.

Disclaimer: I do not own Attack on Titan/Shingeki No Kyojin.

Its still so weird that the Corporal and I have been having sex regularly. I didn't think when I had first threw myself at him one drunken night after the female titan incident that he would welcome me with open arms. Sort of. More like welcome my dick. I can still recall those memories so vividly...

I was drunk off my ass. I had to wash away the pain of knowing that I killed my entire squad with any alcohol I could find. It was still so surreal that they were killed only a week ago. I had been avoiding the corporal as much as possible because I know he hates me for it. He always seems so distant and cold, uncaring. I know what others see. But what I see is so much worse. He has been fighting to keep a cold and calculating face for so long. I can see past his mask, though. Although, right now I cant really see anything in a straight line. My feet are wobbly and my vision has doubled.

I was walking down the corridor toward my cell to pass the fuck out when I saw the Corporal. I tried to hide but instead of stealthily ducking out of the way so he wouldn't see me; I fell flat on my face in the middle of the corridor. I swear to the goddesses, I have about as much grace as a fucking titan. I hear him stop in the hallway and could practically feel the glare he was giving me. "Oi, Yeager! What the fuck are you doing? I have been waiting by your damn cell for an hour to lock your ass up for bed." He stalks up to me radiating with irritation. "Uh sorry sir, I uh was just heading to my cell." I slur out this sentence, removing my face from the stone floor and getting up to salute my captain. I stumble a bit, and he hikes an eyebrow. "Have you been drinking, Yeager?" I gulp and reply with the affirmative. He sighs and promptly turns and drags me to the kitchen. He shoves me into the chair at the dining table and goes to the cupboard. I can't help but watch his ass as he moves to the sink. 'Damn, he has the nicest ass I have ever seen...' I watch tentatively as he fills a glass with water and walks over to the table. He sets the glass in front of me and sits across from me. "Drink that. You won't have a hangover in the morning, if you drink the whole glass." I look at him confusedly and drink the glass of water. This has to be the nicest he has ever been to me, I think. He grabs the glass and walks over to the sink to clean it out. When he's done, he turns and sees me staring at his ass. I avert my eyes quickly, turning a beet red.

He stands there for a minute, seemingly contemplating something, and walks over to me. "Oi, Yeager. Have you been watching my ass this whole time?" Impossibly, I turn even redder. I nod my head, at a loss for words on how to explain to my superior that yes, I am ogling your ass. He stands there for a second, then barks at me to get up. I follow him back to my cell and we both go into the dark room. I stand there a minute, thinking of how I can get this man to fuck me. He walks to my bed, gathering the chains, apparently unnoticed of my stopping. He finally notices that I've stopped and turns around to look at me. "Oi, brat, what are you waiting for, I'm fucking tired."

In a spurt of confidence even I didn't know I had, I briskly walk to the captain and throw him against the wall and kiss him, hard. He goes rigid against my body in apparent shock and stares wide-eyed at me. At an attempt to get him to comply, I grind our clothed dicks together. This seems to break him out of whatever shock he was in and he growls, throwing me down on the bed. He climbs on top of me, gripping my hair pulling me into another kiss, this one much deeper. He grabs a fistful of my hair and yanks, causing me to yelp. Taking the advantage, he shoves his tongue inside my mouth. I tear his jacket off of his shoulders and throw it somewhere onto the floor, sure that he would nag at me about it later. In a blind fit of lust, I rip his button up shirt open, popping every button, tearing it off of his body, throwing it to the floor to join his jacket. He growls at the ripping of his shirt and says "you owe me a new damn shirt, brat." He moves to my neck, nipping and licking the whole way to my clavicle. I do not have a jacket on, so he removes my shirt in one swift movement, throwing it to the floor. He moves all the way down my torso, licking and biting the whole way down, earning lust filled whines from my throat. He moves down to my pants line, and tears open the fly. He looks up at me for confirmation to go ahead. I thrust my hips upwards, giving him the "hurry the fuck up" signal. He unbuttons my jeans with his teeth every so slowly, teasing me the whole while. When he finally gets the fly open, he strips me of my jeans and boxers in one swift movement. My pulsing erection twitches to the sudden change of temperature, making me groan. He licks a stripe from the base to the tip, earning a low groan of pleasure. He moves his mouth to the tip and licks the slit. I whine at him to stop teasing, then scream in pleasure when he engulfs my hard on with his hot cavern of a mouth. Goddesses, my hand has nothing against this man. I feel the tip of my dick hit the back of my throat and I can see stars. He has definitely done this before. I can hear him start to hum and the vibrations of his throat are moving through my cock up my spine causing me to scream in ecstasy. I can feel the hot coil in the pit of my stomach and gurgle out that I'm close. He abruptly stops and stands. I whine from the loss of contact when I look just in time to catch him strip himself the rest of the way. I can only stare at the God staring at me. "Jeez, brat, it looks like you're going to cum just looking at me." I can only stare in reply and he smirks. He gets between my legs again and engulfs me, once again. My back arches off the bed at the sudden warmth around my cock. I look down just in time to see him start to stroke himself and I groan from the lustfull sight. I get to near completion, once again, and when he hears my warning, he hollows out his cheeks, sucking harder and faster. I am a writhing mess of goo at this point. I give notice of my body wracking orgasm by arching my back so far off the bed its a wonder it didn't break in half, and silently scream out my orgasm. My vision has gone white with ecstasy and I can't think of a single moment in my life that I have ever felt that much fucking pleasure. I hear him swallow my orgasm and lean forward capturing me in a searing hot kiss. He pulls away and looks me in the eye. "Eren, I am going to fuck you into oblivion, now. I imagine you are still a virgin, so I will go easy, this time. I want to make one thing clear, however. This is only sex. We are relieving stress, and that is all this will ever be. If you cannot handle this, tell me now and I will leave. If you are content with how things will play out from now on, we can continue this. We are not going to be in a relationship, but we will be lovers. We may see others as we please. This is simply a side thing to blow off steam. Our relationship as superior and soldier will remain the same. Can you agree to this?" I am a little disappointed that he will never love me the way I always have, but any form of Levi I can get is enough for me. I nod my head in agreement, and he pulls me into another deep kiss.

His fingers find their way to my dick and pumps it a couple times to bring it back to hardness. He moves his finger to my puckered hole and circles the opening with his finger. I whine a little at the anticipation. He pulls his finger away and tells me to suck on his fingers. I pull three into his mouth and keep eye contact with him as I suck the shit out of his fingers, soaking them in my saliva. He growls and moves his finger back to my hole. I feel his other hand move to my dick as his finger pushes past the first ring of muscle. I scrunch my face up a little at the new discomfort of the foreign entity. He wiggles his finger around a little telling me to relax and breathe. As he is pumping my dick and soothing my discomfort, I relax around his finger enough for him to add another. He curls his fingers every which way appearing to be searching for something. As I am wondering what he could possibly be searching for inside my ass, he brushes his fingers against something inside me which causes me to screech and arch off the bed, making me see stars. "Ah! Oh fuck, Levi, right there! Fuck, do that again!" He smirks in victory and begins teasing that spot turning me into a pile of goo, again, within seconds. He adds the third finger and begins stretching me, preparing me for his manhood. He removes his fingers from my ass, and moves to spread his precum over his dick. He aligns himself to my hole and kisses me, pushing his dick through the first ring of muscles. I groan from the sudden sting of his large dick entering my ass. He continues in slowly all the way up to the hilt and stops. His eyes are scrunched as he concentrates on not pulling out and pounding into me, mercilessly. I grow accustomed to it shortly after he is fully in and move my hips in experimentation. "A-ah, you're good, Corporal, you can move." He groans as he moves his dick out almost all the way out, and slams back in, causing me to yell out. He sets the pace at a merciless rate and pounds into my bundle of nerves, once again. "Ah! Levi! Right there! Hit there again!" He realigns himself to hit that spot over and over again making me see white every time he hits it. I feel the familiar coil once again in the pit of my stomach. "C-corporal! I'm close!" He grunts and speeds up. My back arches once again and I scream out my release. He is right behind me, grunting out his release. He pulls out and lays next to me on the bed and we both come down from our high. He sits up and looks at me, and smirks. "Not bad, brat. Next time you know what to do." I blush and hide my face in the covers. "Get up, we need to change these sheets and get cleaned up, its disgusting."

When we return from the showers, he leads me to the bed and chains me up. "Goodnight, brat." I smile up at him and whisper good night.

Its been 2 months since then, and nothing has changed, as he said. He has not treated me as a favorite and he has not confessed his love for me. We are strictly solder and superior, and on the side we are lovers without the love. Armin and Mikasa have not even the slightest of suspicions. We have had sex every weekend since that night. Every time, we shower, he chains me up, and leaves. Each night I am in hopes that he will change his mind and confess his love. Each night I am convinced he never will. I can only think that I am the luckiest man alive to even have the chance to touch the Corporal in such a way. I don't think of the others he has fucked, or any that he is fucking besides me. I don't think I can handle that pain. Then again, I am the soldier and he is the superior. Whatever he says goes. I can only keep the hope that one day he will fall in love with me and we will be together.

Alright guys, that's all I'm doing tonight. Depending on the response I get, if any, I may continue this. If you don't like it, don't comment. If you do like it, please let me know. If anyone has any suggestions, feel free to let me know. Thank you!