Work Text:
Light was, of course, an alpha.
Why wouldn't he be? He was superior to everyone else in every way, it only made sense that he would be in the elite group of alphas.
But while Light's gifted nature made sense, there was one person with it that didn't make sense.
It was insulting to think that his esteemed rival, the person who he had thought was his equal, was in actuality an omega.
The thought of it made Light disgusted. How could someone so beneath him be up to par with his skills?
Light was convinced that L actually flaunted it as well. Somehow, L was proud of his dynamic.
It drove Light insane. Just sitting next to the man Light's senses went crazy. L's omega scent was all he could focus on sometimes. It must've been a tactic by the other man to weaken Light's reasoning.
Insulting, it was absolutely insulting to have to play games with an omega.
And his neck. L's neck was unmarked and he dared expose it for an alpha to see. It was as if he was testing Light's restraint.
It all pissed Light off.
"Light, can you hand me that please?" L waved his hand towards a pen.
"Yeah, sure." Light had noticed that today L's scent was particularly noticeable, but kept his instincts under control. At least Light was good at one thing, concealing how he really felt.
He quickly handed L the pen, but for a brief second their hands touched, making Light's brain foggy for a second.
Was L purposely doing this to him?
"Thank you." L said, then quietly went back to work.
Light looked back at his computer, trying to focus, but all he could give attention to was what L was doing. Out of the corner of his eye, he watched the man carefully.
L frowned, wiping at his head before fiddling with the pen. He wasn't even using the pen, he was just playing with it.
Light watched as L fidgeted in his chair, then suddenly stood up.
"Watari set the thermostat too high again." L shakily made his way over to the thermostat that hung on the opposite wall.
Light stood, following him, "The temperature feels fine-"
L wiped his forehead again, "He always turns up the heat.” He began to fiddle with the thermostat.
As Light drew closer to L, he could smell L’s heat. For a second, it made Light pause, his eyes rolling back slightly as he sniffed at the sweet scent.
By now, L seemed to realize that it was not, in fact, the thermostat that was making him hot. He turned back to Light, his face flushed red.
“It would appear that I have begun my heat.” L’s words were just as sharp as usual, but his breath was heavy and hot. “Two weeks early, might I add, highly unusual.”
L walked closer to Light and Light had to throw up an arm to keep him away. L’s scent was getting to him, he could feel his instincts dying to kick in and fuck everything in sight.
“I’m the omega and yet it seems the alpha is struggling more with my heat than me.” L teased slightly.
Damn it. L was messing with him again, toying with that fact that Light’s rival is an omega.
Fine. Light could play that game too.
Light let his instincts take over. He shot over to L, grabbing the man by his shirt and pulling him into a rough kiss. Light began to bite at L’s lip.
L made a soft sound, grabbing at Light. The two men stumbled over to the couch, L landing first and Light on top of him.
Light’s hands explored down L’s body, taking off the man’s shirt, then his jeans and boxers. Light wasn’t too surprised to find L already hard, it wasn’t too difficult to get aroused when in heat.
L opened his legs and Light grinned.
“Oh, you thought I was going to fuck you?” Light laughed. “No, that’s only for omegas that I’ve marked.”
Light grabbed at L’s hair, yanking him over as Light pulled his dick from his pants. He pushed L’s head against his cock. L’s lips rubbed against his tip before the man gently opened his mouth, taking in Light’s length.
Light shut his eyes, enjoying the feeling as he gripped L’s hair tighter, shoving him down further. L gagged, but continued bobbing his head.
L’s eyes burned into Light’s skull as he blew him, but Light stared at a wall instead. He wanted to L to understand that omegas were beneath him.
He could feel L’s heat just being near him. He knew that blowing him wouldn’t quench L’s heat and that brought him immense satisfaction.
Harshly, Light began to buck his hips, fucking L’s throat. It felt nice and tight, which only made Light buck faster as L gagged around his dick.
Light’s whole body tensed as he came down L’s throat. L took it like a champ, quickly swallowing as Light pulled himself out of L’s mouth.
As L wiped his lips, Light‘a instincts kicked in once more. He couldn’t help himself as pinned L down onto the couch, finding the man’s neck and beginning to mark him. Oddly enough, L was complacent, letting Light bite him hard enough to draw the faintest amount of blood. Light licked at the wound when he was done, but quickly pulled away once he realized what he had done.
L smiled, his hand weaving up to touch the mark on his neck, “Does this mean you’ll fuck me now?” He asked.
Light blinked, had L done this on purpose? Was this his plan all along?
L’s smile widened, “After all, we are mates now.”