Four more days ticked by excruciatingly slow, the hints of an approaching heat covering Katsuki completely and displaying his entire situation to everyone around him, the boy refusing to wear his scent patches. Although he didn't mean to be, he was slowly becoming more needy, more possessive, and even more territorial. He growled at anyone who even walked past his dorm, teeth gleaming with venom and a crazed look in his dark red eyes. It was even worse when it came to Izuku. No one was allowed to be within five feet of him without Katsuki losing his shit and attempting to attack whomever it was that tried their luck. He always snapped and snarled at anyone that got too close to the Alpha or talked with him for too long. Izuku always chuckled sheepishly when their classmates stared in shock at the scene, apologizing on Katsuki's behalf.

Izuku was absolutely drenched in Katsuki's scent constantly, happily allowing the Omega to scent him as much as he pleased while simply watching in amusement. He liked how possessive Katsuki was, it showed how much he cared for him. He didn't like others trying him, however. When Ochako had told him it was silly how Katsuki was acting, he had glared harshly at her and told her it wasn't any of her business. She apologized halfheartedly, then proceeded to try to scent him. It wasn't long until the blond Omega walked in and attempted to tear her limb from limb. Izuku had been able to calm him, but Katsuki didn't even have to tell the beta girl off like he wanted to. Izuku did it for him. Everyone was surprised at how mean the Alpha was to the girl. No one blamed him, though. It was Ochako's fault, after all.

Now here they sat, Izuku sweetly rubbing his back while Katsuki aggressively scented him. It was routine now, and Izuku was just happy that the Omega trusted him enough to be so vulnerable with him. It wasn't long before the small boy sat back when he felt like he had done a good job, crawling into his lap and wrapping his arms and legs around the prime with a pleased hum. "You did so good, Kacchan!" He chirped, praising him. "Do you want me to scent you now?" He questioned softly, smiling at the little nod he received in response.

"Yes, please..." He mumbled, hiding in his chest shyly. The Alpha did as asked immediately, covering the small boy in his pheromones and purring softly to calm his rapid heartbeat. His wrist slid along his jaw and down his arms, enjoying how Katsuki leaned into the soft grazes. He smiled once he was done, nuzzling his nose against his cheek and wrapping his arms around his hips, carefully tugging the soft blanket pooling around Katsuki's hips so that he was better covered. He knew it was cold in his room, so he wanted him to be extra comfortable, especially considering they were sitting in his nest. If Katsuki actually knew that the heavily scented gift was his claim over him, the boy had yet to say anything. He supposed it was okay then, so he made a mental note that Katsuki didn't mind his possessive pheromones in his nest. "Hey, Izuku...?" The Omega's soft voice brought the Alpha out of his momentary trance, emerald eyes shifting down to look at the boy still pressed against his chest. He had a feeling he was secretly just trying to rub his cheeks against Izuku's soft sweatshirt, but he didn't mind. He wanted Katsuki to give in to his instincts for a while.

"Yes, Kacchan?" He purred, bringing a hand up to slide into his silky blond hair, gently massaging his scalp. Katsuki went lax immediately.

"U-Uhm..." His voice faltered slightly, his dainty fingers clutching tightly at the blanket covering them. "C-can you smell that?" He asked timidly, whimpering slightly. Izuku took a moment to sniff the air, breathing in the heavenly pheromones swarming around his head. But something was different — The sweet hints of heat blooming rapidly in the room as they sat together in the center of the Omega's nest. Izuku salivated, a low growl bubbling up in his throat before he buried it down, not wanting to startle the boy.

"Oh." He stated simply, not knowing what else to say as he swallowed the lump in his throat. He knew he wasn't in heat just yet, but it wouldn't be long before the haze took over. He wasn't quite sure what Katsuki wanted to do for his heat regarding their relationship.

"A-are you upset...?" Katsuki whispered, somehow pressing closer to the Alpha while tightening his hold around him.

"Of course not, baby." Izuku crooned, butting their cheeks together affectionately. He liked the way the new pet name sounded. He pulled the Omega away from his chest slightly to stare him in the eyes, panic rising on his face when he realized Katsuki was crying. "Oh, please don't cry!"

"I-Izuku, I'm scared..." The Omega admitted, sniffling and whining loudly. The prime was quick to hug him a bit tighter, his scarred hands working to massage the gland behind his ear, calming him down effectively. "I-I haven't had a heat in years, and... and I'm scared you'll leave me... Or be like him... I know you would never hurt me like he did, but I can't help it." Soft whimpers filled the air, Izuku sighing and cupping his face tenderly.

"Oh, sweetheart... I know it's hard for you, but I promise I'll never leave you. I'm going to take care of you and love you like you deserve." He smiled, pressing their foreheads together while they intimately held each other. "I'm here for you."

"T-Thank you..." He muttered, gulping slightly and tilting his head up to shyly kiss the Alpha's jaw. Izuku smiled happily, carefully laying him down and nosing against his chin. He silently pressed his lips against the corner of his mouth, the Omega blushing and adverting his gaze in embarrassment. A rough hand laced with his own, the Alpha gently playing with his fingers while crooning sweetly. Izuku silently gazed down at his delicate nails painted a soft pink, a shimmer of delight gracing his eyes. He glanced around and puffed his chest out in pride that all of the items he had gifted the Omega so far throughout their short courtship were being displayed proudly. Soft nesting blankets and pillows adorned his nest, all of which were either baby pink or creme; small decorative items lined his shelves and desk; twinkling lights hung above his bed, as well as cute photos he had printed of the two together; the boy was even wearing the comfortable clothes he had bought him, the silky black leggings and the light orange hoodie fitting over his frame perfectly. He even wore the fuzzy socks with pride. It didn't go unnoticed how the Omega made an attempt to wear everything he was gifted. He was happy Katsuki liked it all.

Katsuki silently watched the Alpha stare in awe at how he displayed his courting gifts in his den and nest, his chest filling with pride that Izuku was happy with the placement of everything. He wondered how he'd react to the white collar wrapped around his neck, completely covered by his hoodie.
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1246 words