The living room of their shared apartment was a chaotic testament to their clashing personalities—a mismatched graveyard of thrift store furniture, strewn with empty energy drink cans and the lingering, acrid scent of burnt popcorn. The dim light from a single flickering bulb cast long shadows over the mess, barely illuminating the towering figure of Subin sprawled across the sagging couch. His white hair fell in a messy cascade over his sharp, angular features, icy blue eyes locked on the worn paperback in his hands. But the faint twitch of his jaw betrayed the fraying edges of his patience, a storm brewing beneath his cool exterior.
The door slammed open with all the subtlety of a wrecking ball, and in strutted Yeonjun, the bane of Subin’s existence. The younger stepbrother was a whirlwind of chaos, his dark hair tousled as if he’d just rolled out of bed, a smirk plastered across his face. His phone blared some obnoxiously loud trap beat, the bass vibrating through the room as he kicked off his sneakers without a care, one landing dangerously close to Subin’s head. As if that wasn’t enough, Yeonjun spun on his heel, locking eyes with Subin, and flipped him the bird with a cheeky grin.
“Yo, Ice King, you gonna sit there brooding over your little book all night, or are you finally gonna grow a personality?” Yeonjun taunted, cranking the volume on his phone even higher. His voice was sharp, dripping with mockery, as he leaned against the armrest of the couch, far too close for Subin’s liking.
Subin didn’t even bother to look up from his book, his tone as frigid as his gaze. “Keep running that mouth, brat. I’ve got ways to shut you up.”
Yeonjun barked out a laugh, tossing his head back as if Subin had just told the world’s funniest joke. “Oh, I’m shaking in my boots, big bro. What’re you gonna do, bore me to death with your sad poetry collection? Hit me with a metaphor? Come on, give me something to work with.”
Subin’s fingers tightened around the edges of his book, the leather creaking under the pressure. He finally lifted his eyes, pinning Yeonjun with a look so cold it could’ve frozen hell over. “One more word, Yeonjun, and I’ll have you on your knees begging for mercy. Test me. I dare you.”
The challenge hung in the air, electric and dangerous, but Yeonjun wasn’t one to back down. His smirk widened as he grabbed a half-empty can of soda from the coffee table, twirling it between his fingers with exaggerated nonchalance. “Oh, I’m so scared of the big, bad Subin. What’s next, you gonna ground me? Send me to my room without dinner? You’re all talk, man. Always have been.”
Before Subin could fire back, Yeonjun “accidentally” tipped the can, a stream of sticky, fizzing soda splashing across the open pages of Subin’s book. The younger man’s eyes widened in mock horror, his hand flying to his mouth. “Oops. My bad. Guess I’m just so clumsy around royalty like you, Your Frostiness.”
That was the final straw. Subin snapped the ruined book shut with a force that echoed through the room, his movements slow and deliberate as he rose to his full, intimidating height. Yeonjun took an involuntary step back, but the smirk never left his face, even as Subin loomed over him, a predator sizing up its prey.
“You think you’re funny, don’t you?” Subin’s voice was a low growl, laced with a dangerous edge that sent a shiver down Yeonjun’s spine—though he’d never admit it. “I’ve put up with your nonsense long enough. Time to teach you some manners, pup.”
Yeonjun snorted, folding his arms defiantly. “Pup? Really? That’s the best you’ve got? I’m not some stray you can just—hey, what the hell are you doing?”
Subin had already turned away, striding toward a cluttered drawer in the corner of the room. He yanked it open with a sharp tug, rummaging through the mess until his fingers closed around a small, nondescript box. When he turned back, a sly, almost wicked grin curled his lips—a rare sight that made Yeonjun’s bravado falter for half a second. Subin held up his prize: a black leather collar, complete with a silver buckle, a fluffy tail attachment, and a pair of perky, faux-fur ears.
Yeonjun’s jaw dropped, his snark momentarily replaced by sheer disbelief. “You’ve gotta be kidding me. What is this, some kinda kinky cosplay shit? I’m not wearing that, you freak!”
Subin’s grin only widened as he stalked closer, the items dangling from his long fingers. “Oh, you will. I bought these as a joke a while back, but now? Now I think they’re perfect for a little mutt like you who can’t behave. Come here, Yeonjun. Don’t make me chase you.”
“Chase me? I’d like to see you try, old man!” Yeonjun bolted for the other side of the couch, but Subin was faster, his long legs closing the distance in two strides. A brief scuffle ensued, Yeonjun’s laughter mingling with half-hearted protests as Subin wrestled him down with embarrassing ease, pinning him against the cushions.
“Get off me, you oversized snowflake! I’m not your damn pet!” Yeonjun squirmed, but there was no real venom in his voice, just a playful edge as Subin snapped the collar around his neck with a satisfying click.
“There. Much better,” Subin purred, his voice dripping with smug satisfaction as he adjusted the ears on Yeonjun’s head, giving the tail a teasing tug. “Look at you. My little disobedient pup, all dressed up and nowhere to go. Now, are you gonna behave, or do I need to tighten the leash?”
Yeonjun’s cheeks flushed a faint pink, though he quickly masked it with a scowl. “This is ridiculous. You’re enjoying this way too much, you sadistic bastard. What’s next, you gonna make me bark for treats?”
Subin’s eyes glinted with mischief as he leaned in close, his breath warm against Yeonjun’s ear. “Don’t tempt me, brat. I might just make you roll over and beg.”
For once, Yeonjun didn’t have a comeback, his mouth opening and closing like a fish out of water. Subin took advantage of the rare silence, sitting back on the couch and pulling Yeonjun down to sit beside him with a firm grip on his arm. “Let’s test this out, shall we?” he mused, his tone deceptively casual as he delivered a sharp, deliberate pat to Yeonjun’s thigh, the sound echoing in the suddenly quiet room.
Yeonjun froze, a strange, almost involuntary sound escaping his lips—a soft, needy whine that caught both of them off guard. His body betrayed him further, leaning into the touch as if craving more, his sharp edges melting just for a moment under Subin’s commanding presence.
Subin blinked, his icy facade cracking with a flicker of surprise before a slow, predatory smile spread across his face. “Well, well. Looks like my little pup isn’t as tough as he pretends to be. What was that sound, Yeonjun? Want another pat?”
Yeonjun snapped out of it, his face burning as he shoved at Subin’s chest, though the gesture lacked its usual fire. “Shut up! That was nothing, okay? Don’t get any weird ideas, Ice King. I’m still not your damn dog!”
But Subin’s low chuckle told Yeonjun everything he needed to know—the dynamic between them had just shifted, and there was no going back.
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