Heat: Karma/Nagisa Omegaverse!smut

Smuuuut

Chapter Text

The only noise in the dark room was coming from the television, which was playing a movie special that neither boy was really bothering to actually watch. Nagisa shoveled a fistful of granola into his mouth as he watched his boyfriend finish up his homework. The omega had been dating the notorious bad boy Karma Akabane for about three months now. They were one of only three couples in Class 3-E: Isogai and Maehara and Kanzaki and Kayano being the other two. But somehow it was always the redhead and the bluenette that always ended up being the center of the gossip in their Assassinaton Classroom. The smaller boy always hated the attention, so nights like these were rare: evenings where their parents would be out of town and they would have a simple sleep over. But since when were things ever simple between these two? Nagisa couldn't believe he had forgotten.

The omega felt a sudden warmth spread through him, from his cheeks to the tips of his toes. He stiffened, ears perking up as a jolt of heat hit his lower zone. His toes curled, and he turned to Karma, his breathing erratic. The ginger was staring straight back at him, his face flushed and his mouth slightly ajar. He had noticed. Of course he had noticed. Alphas could smell n omega going into heat from miles away. Nagisa couldn't form words with the lust clouding his mind, only pant helplessly at his partner. He looked down to see his painfully erect cock and a wet spot on the couch from his asshole just before Karma lunged at him.

The alpha's lips crashed recklessly into the bluenettes, and they began to make out for all it was worth. The bluenette moaned and mewled into the kiss as the taller boy began to grind his hard-on against his lover's, causing him to rock his hips back and forth into the motion.

"Mm, Nagi, you smell so goood," Karma growled lustfully, licking up and down his boyfriend's exposed neck and leaving kiss marks in his wake. Nagisa gasped loudly as Karma gave a long kiss to his collarbone, rutting up his hips violently. The alpha pushed up the omega's white tank top to reveal his enticingly pale torso and two hard, pink nipples, one of which the ginger immediatley latched onto. The small boy gave another wanton moan as he stroked Karma's ears. The taller boy moved to the other nipple, kissing and sucking and licking at it until the bluenette felt that he was going to come from stimulation alone.

And he did. The moment the redhead began to fondle him through the fabric of his pajama pants, he bucked up and released, screaming his partner's name. Karma almost snickered when he pulled the dirtied garment of of Nagisa's groin with his underwear and found that the omega's member was still swollen and flushed with arousal. That was what he anticipated about sexduring heat: no matter how much he was pleasured, no matter how many times he came, Nagisa could never truly find relief without his alpha knotting him. The redhead paused to admire his lover's erotic state: the flush of his cheeks contrasting beautifully with his sparkling blue eyes, his smooth pale skin soft and glistening, his thin body and wide hips looking so absolutely tantalizing while his fluffly periwinkle tail thrashed.

The alpha paued the intense moment to lean down and kiss his partner's temple softly. "You're so fucking beautiful, baby; You're a goddamn masterpiece."he whispered breathily.

With that said, he returned his attention to his boyfriend's ass, which was gushing slick. Karma couldn't help himself: He gave one of the bluenette's ass cheeks a quick slap, and was rewarded with a loud cry. The taller boy giggled and began to prepare Nagisa, sliding in one, two, three fingers into his entrance. The smaler boy groaned and dug his fingernails into the sofa cushions. Finally, Karma pulled out his neglected manhood and pushed himself into his partner's entrance.

Both boys moaned loudly at the sensation: it was heavenly on both ends.

"Oh, god, Karma--Move! Please move!" Nagisa begged, and the redhead eagerly complied, thrusting in and out of his omega greedily. Within a few moments, he had found the bluenette's prostate, and he abused it as the omega screamed in pleasure ad sobbed in estcasy. Throes of erotica racked the young alpha as he rested his head on Nagisa's chest, then went to kiss him passionately. Their tongues crashed and slid against each other lustfully. Karma felt his end approaching, and he hastily grabbed Nagisa's erection and began to stroke feverishly. The bluette thrashed and shook his head and bucked himself against his lover's hips, al the while letting stream of "Karma"s escape his lips. Everything felt so hot. Karma was roasting him alive.

They came at the same time, Nagisa arching his back and ejecting his seed onto both their stomachs and Karma's hand as he cried out his lover's name while Karma rode out his orgasm in Nagisa's ass, moaning the omega's name lewdly. The redhead pulled his lover onto his chest and laid bak,not puling out because he knew what was about to happen. The bluenette, however, had been too absorbed in his heat to realize what was going to happen until he felt his boyfriend's dick swelling inside of him. He shot up on Karma's lap.

"Oh, god, oh no, are we-Are we knotting?!" The smaller boy asked in a panic.

"Mmm, yeah~" Karma sighed. The knotting sensation wasn't as fantastic as sex, but it still felt great.

"Oh, no no no no no," Nagisa whispered,beginning to hypervenilate as realization hit him. "I can't be pregnant, I can't be pregnant, no shit this is bad--KARMA ARE YOU LISTENING I COULD BE PREGNANT WITH YOUR CHILD-"

"Yeah, I know," The ginger purred , dazed, "Wouldn't that be awesome?"