Thread by @Rominati_

#bkdk slight kacch/ako #angst a/b/o
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“Wow, that collar is beautiful! Bakugo must have spent a fortune on it.”

Izuku paused, peering over the edge of his book to stare at his step sister and her friends fawning over the expensive jeweled collar.

“He must really like you…”

“Isn’t this your second season with him?” Tsuyu questioned, tapping her fingertip on her chin curiously.

Ochako flushed, her cheeks dusted pink. She toyed with the dangling crystals at her collarbone, glancing away like some shy maiden.

Izuku knew better though.

“You know what they say right?” Mina said teasingly, “If you’re with the same alpha after three seasons, you’re good as mated.”

Izuku gripped his book, the pages crinkling between his fingertips. He tried to push down the burning jealousy brewing in his gut.

He hated it. He hated feeling envious of Ochako. Katsuki was his friend first—long before they learned of their secondary genders and the rituals of mating came in to the picture.

Katsuki was his Kacchan, as he so lovingly dubbed the blond alpha.

Izuku had always admired him for his intellect and his wit. Katsuki was two years older than him, and to Izuku he was the coolest person since he discovered All Might.

Izuku didn’t know he was in love with Katsuki until after the blonde presented at the tender age of 16.

Everything changed afterwards. No longer was Katsuki as devoted to their time together as he was to “courting” every living, breathing omega in their small town.

Over time, alphas and omegas lost the ability to mate via scent glands.

The organs becoming as useless as the appendix. Now, the only way an omega can be considered “mated” is by wearing a collar provided by the suitor and spending their heats with them.

Izuku stood witness over the years as Katsuki dressed up his conquests in all the finest and latest collar fashion. Soon, Katsuki garnered a reputation. One that should’ve deterred any sane omega.

But who doesn’t love the idea of making the town’s most wanted alpha bad boy their own?

His mother used to say that a rakish alpha made the best mate, but Izuku wasn’t so sure.

Having to watch a new omega leave the blonde’s house—knees wobbly like a newborn fawn—drove him crazy with heartbreak. He had to watch the only person he had ever loved give away his affections like candy on Halloween.

How was that mate material?

Izuku desperately wished that this was all just a facade. Maybe Katsuki had something to prove? Despite his playboy ways, despite the fact that Izuku wanted to hate him, he just couldn’t. Because Izuku knows a version of Katsuki that others didn’t. One that was kinder and gentle.

So, he pines from the sidelines, counting the days for when he finally turned 18, and he could leave it all behind.

“Who knew that Katsuki Bakugo, Mr. I-don’t-mate-the-same-omega-twice, is settling down,” Toru said, her tone filled with wonderment. Ochako smiled. There was a smugness to it that unsettled him.

“He’s not settling down,” Izuku grunted softly, flipping to the next page.

The girls stiffened, shifting their gazes away from Ochako and onto Izuku. The green-haired boy had gone back to reading his novel, unaware of the icy stare.

“Did you say something, Deku?” Ochako questioned with an overly sweet tone. Izuku stilled, wide jade eyes lifting upwards

“U-Uhm, I just meant that since this will be your second season with him and according to Mina.. well…”

Izuku gulped, shifting in his seat as Ochako huffed irritably, brown eyes narrowing dangerously. Izuku set his novel down onto his lap, facing the group of girls.

They glanced between the step siblings, an uneasy tension filling up the room. Ochako flipped her brown hair, caressing the jewelry at her nape.

“And?” Ochako challenged, raising a thin brow condescendingly, “It’s pretty clear that after this season, Katsuki is as good as mine.”

“He’s not a piece of meat, Ochako,” Izuku retaliated, shaking his head in disappointment, “Kacchan is an alpha. An alpha with feelings—“

“So what?” Ochako interrupted, glaring at the green-haired boy, “I’m an omega with feelings. And my feelings seem to match his.”

Izuku’s jaw clenched, defiance flashing in his emerald green eyes. He internally debated whether he should just drop the conversation and save both himself and his step sister’s friends from Ochako’s ire before it escalated any further.

But mama Inko didn’t raise a little bitch.

“Speaking as a completely objective third-party observer with absolutely no personal interest in the matter,” Izuku began, thoroughly enjoying the eye twitch he received in return, “I’m not so sure you and Kacchan make a good fit.”

Silence shrouded the room.

Ochako’s friends gaped in shock. It’s as if they had never seen someone stand up to her before. It stirred something deep within him. Making him feel almost powerful as he watched Ochako’s face contort into fury.

“What did you say?” Ochako asked, slowly approaching him.

“I said—“ Izuku started, then grunted when a sharp fingernail punched his shoulder repeatedly.

“What do /you/ know about Katsuki and I, huh?” Ochako demanded angrily, “Do you honestly believe that he could do better than /me/?”

“I-I didn’t say that—“

“You haven’t even presented!” Ochako continued, sneering down at the green-haired boy. “You’re nothing more than a stupid beta! What do you know about alphas and omegas?!”

“Ochako,” Mina called, heart aching at the sight of tears in Izuku’s eyes. She reached over to the brunette

Placing a placating hand on her shoulder, but it was immediately shrugged off. The door creaked open, and everyone but Ochako looked towards the doorway.

Izuku wished in that moment to disappear.

Mina exchanged glances between the newcomer with Izuku, who decidedly bowed his head in embarrassment.

“Why don’t you just accept the fact that Katsuki will never look twice at you,” Ochako said, eyes wild with outrage.

“Even if you present right now, even if you turn out to be an omega, you’re no match for me!” Ochako cried, placing a manicured hand on her neck. “See this? This is proof of what Katsuki wants. And what he wants is /me/.”

“Like hell I do.”

Ochako gasped, face turning white.

She whirled around, gaping as Katsuki stalked towards her, ruby colored eyes simmering with wrath. He grabbed a handful of the collar’s crystals and yanked. The jewels scattered all across the floor.

As Ochako fell to her knees, desperately gathering the poor remains of her once immaculate collar, Izuku felt a change within him. It wasn’t until he stood on wobbly feet, did he realize he was feeling hotter than usual.

Desire pooled in his gut, yearning to be filled and bred. Izuku took one step forward and clutched onto the nearest person. Lifting his head, green clashed with red.

Izuku watched as the alpha’s pupils dilated before turning into slits.

“Y-You’re an omega—“

“Kacchan,” Izuku groaned, “Please… help me…”