Disclaimer: Shingeki no Kyojin and its characters do not belong to me. I simply write for the pleasure and freedom of doing so.

Tired, hazy gray eyes fluttered open for the umpteenth time that night. Fucking sounds, Levi thought, but he knew that there wasn't any sound keeping him awake.

The air blew through the window, making the raven-haired man shift to the side to avoid his face being hit by the draft. Levi was not uncomfortable, nor was he sweating or freezing. He was not itchy from the bed sheet and his pajamas. He also wasn't hungry, or thirsty (but how could he be considering he always leaves a glass of water on his side table). He wasn't sick, or sneezing, or having the usual headache he'd get from training brats. He didn't need to take a piss, or a shit. He didn't need anything at the moment.

So then why couldn't he sleep?

The corporal could already feel his eyelids drooping, but sleep still evaded him. No matter how tired his body was, or how drained his mind felt, nothing could put the poor raven-haired man to a peaceful rest. Closing his eyes close, Levi could feel the uneasy silence clouding his senses. That fucking Four-eyes, his mind raised to Hange's face telling him that he would continue to suffer from insomnia if he didn't stay with his mate.

His mate

Not just Any mate, but His. The one he was quote and quote "soulbound" to. Ugh. Initially, he had refused to believe that there was a mate made for him. Levi always sought to reason out that his mate had probably died, or is dying, or would hate him if he ever met him.

But that wasn't the case anymore, because the corporal had found his mate.

Levi's eyes quickly opened, stopping his train of thought. He wouldn't go to sleep if he thought about it all night. Pushing away all the ideas in his head about his mate, Levi tried to go to sleep.

Tried.

His eyes opened a few hours after, finally, after the raven-haired man stopped them from drooping again. Thank fuck it's morning, internally speaking to himself as he noted the first rays of sunlight hit the floor. His room remained the same since he had gone to bed. The small desk unmoved, and the water in his glass did not get any less. It was only his bed, showing evidence that the man who lay in it was restless and unable to sleep. He fixed his bed, and quickly rid, what he thought was, the only evidence of his condition.

How wrong Levi was.

As soon as he stepped into the bathroom, his reflection came into view. A raven-haired man with a bedhead, eyebags the size and color of black holes, a layer of stubble growing on his chin and jaw, and a still muscular but overworked body. Jesus he looked like shit. This was all evidence that he needed a mate. Still, the stubborn corporal refused to give in.

Fixing himself, he let his tired body go through the motions while his mind wandered to his possibly-but-highly-unlikely-"but Hange said he was his"- mate.

How does one even begin to describe Eren Jaeger.

A taller-than-Levi 18 year old emotional boy who saw his mother get eaten by a titan in Shingashina when Wall Maria fell, been obsessed with killing all the titans since that time, had a dad that bailed out on him and his adopted sister (his adopted sister had quite a story too), a key given to him by his dad to open the basement, a boy who can turn into a titan whenever he inflicted self-harm by biting his hand? Jaeger was pretty much a damn handful.

The attractiveness of Eren came from his eyes, which were like stars that were a beautiful mix of many colors. In the beginning, his eyes were brown, downcast as he walked into the courtroom to face General Zacklay. Later on, his eyes turned a bit darker, almost as if it were teal and brown mixed together, when Levi started beating sense out of the boy (which he both enjoyed but resented). He could sense resentment, unconsciously making his heart clench because it was like he was giving his mate and avenue to hate him. Thus, he was forced to make sure he wasn't hated. Eren, do you hate me? To which he was promptly answered with a no. But still, Levi was unsure.

Then, one day, when Eren was laughing outside the castle headquarters with petra, the raven-haired man noted the shift of the eye color once more. When Eren turned towards the late afternoon sun, his eyes shone a turquoise color with hints of gold along the iris. They really did look like bright stars. Fucking brat, Levi thought as he continued to eye fuck the brown-haired titan shifter, is he trying to make me want him?

The turquoise eyes of Eren shone even brighter when he left for his first mission outside the walls. Levi could sense the determination for an ideal world, rid of all those fucking titans. The ideal world where he and Eren (wait no just Eren) could go to the beach and get away from all the Military Police bastards who thought of too highly of themselves. Sadly, Eren's eyes did not remain the same throughout the entire mission. Even though he had returned alive, his eyes were scarred. They would never be the same, but they were still beautiful.

Shaking himself back, the corporal realized that he had unconsciously put on his uniform and was now ready to head on to those shitty brats (one of them happens to be his mate).

And so with no sleep, and a lot of self-will, Levi made his was down to breakfast.

Corporal Levi knew, from the moment he saw the brat in chains three years ago, that Eren Jaeger was his soul-bound mate, the one made for him in the stars, and the one he was destined to live with and be loved by forever.

Some people, like Levi, were gifted with the sixth sense to tell their mate from the very first time they'd set their eyes upon them. It was a gift that had been handed down to him by his mother. She knew immediately that Levi's father was her mate, but it took a little longer for him to figure it out. This was the exact situation between Levi and the brat.

Corporal Levi researched on the idea of a "mate", and saw that a personal hell would rain over him if he didn't get together with his mate within two and a half years of meeting him or her. It read, "You will literally not be able to function properly without getting together with your mate." Getting together means getting married and body and soul kind of thing, and then bonding in blood and that type of shit.

"Tch" said the raven-haired man, and went about his normal routine.

At that time, Levi thought he was strong enough to counter the "personal hell" that he would face. Again, he thought wrong.

That was how he got insomnia a month ago. It wasn't because of seeing hundreds of soldiers get violently crushed and eaten by titans. Hell no. This was all his Eren's doing. He knew this was how he was going to start "not being able to function". First, he would be sleepy and tired but not being able to. Then it would escalate to him getting poor health and getting himself killed by a goddamn titan. It was like nature's way of bitching to Levi, and convincing him to get with Eren already. But fuck, life wasn't that simple was it?

Corporal Levi, Humanity's Strongest Soldier, cannot sleep without that brat. He couldn't be falling for this 18-year-old boy, not being able to function without him. That was just stupid. Plain, fucking, stupid. He should just die along with other soldiers during their next mission outside the walls so that it'd be done. Levi could finally have eternal rest (haha), and Eren would never know that Levi was his mate in the first place.

That was Levi's almost perfect plan if he still wasn't able to sleep.

It was almost perfect, because it still contained a few flaws. He was wrong about quite a number of things: his beliefs about having a mate, about dying, about not sleeping, about being stupidly attached to a young boy, and so on and so forth.

Oh, and the thing about Eren never knowing Levi was his mate? Yep, the Corporal was wrong about that too.

This story will probably be three chapters long, unless i decide to make it longer.

~R