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The Zenin estate loomed like a fortress under the Kyoto moon, its shadowed halls echoing with the weight of centuries-old curses and clan politics. Megumi Fushiguro, it's Zenin now, the clan's unprecedented omega head at just 20, stood rigidly in the grand receiving room, his dark haori pristine despite the storm raging in his chest. His scent—cool cedar and shadowed mint—betrayed nothing, suppressed by inhibitors, but his sharp eyes screamed disdain.
Across from him, Yuuji Itadori, the boisterous alpha head of the Kamo Clan, grinned like he'd just won a street fight. His warm cinnamon-and-sun scent filled the room, clashing with Megumi's chill like summer against winter. The marriage contract lay signed between them: a merger of Zenin might and Kamo resources. To Megumi, it reeked of greed. He's only here for the Zenin vaults and alliances, he thought bitterly. Another alpha playing house for power.
"Hey, Megumi! Can't wait to make this official," Yuuji said, rubbing the back of his neck, his pink hair tousled from the wind. "I brought mochi from my favorite spot in Tokyo—red bean, your favorite, right? Naobito mentioned it once."
Megumi's eyes narrowed. Even knows my snacks. Research for the deal. "Save it, Itadori. I know why you're doing this. Zenin gold lines your pockets, Kamo gets legitimacy. Don't pretend it's more."
Yuuji blinked, then laughed—a bright, genuine sound that made Megumi's suppressed omega instincts twitch uncomfortably. "Huh? Nah, man, that's not it at all!"
The wedding was a blur of rituals: shared sake, bound wrists, vows whispered under cursed wards. That night, in their new shared quarters—a lavish suite bridging Zenin and Kamo wings—Megumi barricaded himself on one side of the king-sized bed with a pillow wall. "Stay on your side. This is business."
Yuuji flopped down with a dramatic sigh, not touching the barrier. "Okay, okay. But hey, wanna hear about the time I punched a special grade curse while eating takoyaki? Mid-bite!"
Megumi turned away. Idiot.
But Yuuji didn't stop. The next morning, he was up at dawn, brewing matcha with shaky hands—"I practiced for weeks, swear!"—and presenting it with a lopsided bow. "For my fierce omega husband. You lead the Zenin like a boss. It's hot."
Megumi sipped despite himself. Perfect temperature. He scowled. "Flattery won't get you heir funds faster."
"Not after funds," Yuuji insisted, eyes sparkling. "After you. Saw you at the last summit—summoning those shikigami like poetry. Thought, 'Damn, that's my kinda strong.'"
Megumi's cheeks warmed, a traitorous omega flush. He shoved past to a clan meeting, but there was Yuuji later, waiting with a bento: onigiri shaped like wolves, teriyaki chicken (Megumi's guilty pleasure), and a note: Fuel for the clan's badass head. -Your alpha (hope that's okay?)
He's bribing me with food now? But Megumi ate it all, shadows of doubt creeping in.
Weeks blurred into a routine of Yuuji's "rizz attacks." He'd spar with Megumi in the gardens, letting Nue, Megumi's bird, clip his ear just to praise, "Your control's insane—teach me?" Or he'd scent-mark the doorframe subtly with his warm alpha presence during Megumi's heat-adjacent cycles, warding off lesser alphas without a word. Once, during a tense elder council where Zenin hardliners sneered at their "omega weakness," Yuuji stood tall, arm around Megumi's waist. "Speak to my husband like that again, and we're dissolving this merger—my call." The room went silent; Yuuji's Kamo authority hit like a hammer.
That night, pillow wall down, Megumi confronted him. "Why? You could've let them undermine me for leverage."
Yuuji tilted his head, grin softening to something tender. He scooted closer, not touching, waiting for permission. "Told ya. Not about money. It's you, Megumi. Your fire, your shadows, the way you glare like you could summon a divine dog to eat me alive. I wanna be the alpha who stands with you, not over you. Marry me for real?"
Megumi's barriers cracked. His scent bloomed freely for the first time—cedar warming to spring rain—and he leaned in, forehead against Yuuji's. "You're an idiot... but prove it. Kiss me like you mean it."
Yuuji's eyes lit up like fireworks. He cupped Megumi's face gently, thumbs tracing jawlines, and kissed him slow and sweet—cherry mochi warmth melting ice. No rush, no demands, just alpha devotion wrapping omega like a promise.
From then on, the Zenin-Kamo alliance wasn't just business. It was home: Yuuji rizzing Megumi with bad puns over breakfast ("You're fushiguro-geous!"), stolen nest cuddles after missions, and whispers of "mine" that meant *partner, not property.
Megumi never admitted it first, but one dawn, tangled in sheets, he murmured, "Stay close, alpha. For real."
Yuuji beamed, nuzzling his neck. "Always, omega. Best merger ever."
~~~
The Zenin-Kamo wedding was a spectacle: silk banners fluttering in Kyoto winds, cursed energy humming like a live wire. Megumi stood at the altar in a black kimono embroidered with shadow wolves, his omega scent locked down tight. Yuuji, in crimson Kamo robes, grinned across the gap, eyes hungry but patient.
Then he arrived—Satoru Gojo, uninvited, teleporting in with a pop of infinity and a megaphone. "Surprise, lovebirds! Who's ready for the Gojo Special?" Dressed in a tuxedo haori hybrid, he hurled confetti bombs laced with harmless illusion curses—fake fireworks spelling "MEGUMI WILL DUMP YOU FOR SUKUNA" in the sky.
Elders gasped. Megumi's shadows twitched, Kuro manifesting with a growl. "Gojo—out."
But Yuuji laughed, slinging an arm around Megumi's waist possessively, his alpha scent surging cinnamon-hot to drown the chaos. "Ignore the clown, babe. He's just jealous I got the hot omega first." He winked at Gojo. "Nice try, sensei. Wedding crasher tax: dance with Naobito."
Gojo pouted dramatically. "Fiiiine. But if you hurt my kouhai, Itadori, I'll infinity-block your—"
Yuuji cut him off with a growl, pulling Megumi flush against him mid-vows. "Hurt him? I'd die first." Their bound hands glowed with sealing energy as Gojo, grumbling, two-stepped Naobito into a corner. The crowd erupted in relieved laughter; the merger was sealed amid absurdity.
~~~
Post-ceremony feasts blurred into night. Back in their warded suite—tatami floors, shoji screens glowing with fairy lights—Megumi shoved Yuuji against the door, heat from the day's tension igniting his suppressed omega fire. "That was humiliating. You laughed."
Yuuji's pupils blew wide, alpha instincts roaring at Megumi's blooming scent: cedar smoke laced with needy jasmine. "Couldn't help it. You're sexy when pissed." He flipped them effortlessly, pinning Megumi to the wall with hips grinding slow, deliberate. "Lemme make it up to you, husband."
Megumi's breath hitched, walls crumbling under Yuuji's touch. "Prove you're not here for the clan... alpha." It was a challenge, a plea—his body arching as Yuuji's mouth claimed his neck, teeth grazing the scent gland without biting. Not yet.
Yuuji dropped to his knees, hands reverent on Megumi's thighs, sliding kimono layers aside. "Only you, Megumi. Every damn day." His tongue traced inner thighs, hot and teasing, before lapping at Megumi's slick entrance—omega sweetness bursting on his tastebuds like forbidden mochi. Megumi keened, fingers twisting pink hair, shikigami shadows flickering faintly on the walls like ethereal witnesses.
"Yuuji—fuck—" Megumi's legs buckled, but Yuuji held him up, sucking and swirling with filthy devotion, two thick fingers curling inside to stroke that spot that made stars explode behind Megumi's eyes. Slick dripped down Yuuji's chin; he growled approval, free hand palming his own straining cock through robes.
"Not done," Yuuji rasped, rising to kiss Megumi deep—sharing his own taste, messy and claiming. They stumbled to the futon, robes shed in a frenzy. Yuuji laid Megumi back like treasure, cock heavy and leaking as he nudged Megumi's thighs apart. "Gonna knot you proper. Make you feel it—all mine."
Megumi nodded, feral, pulling him in. Yuuji sank in slow, inch by inch, stretching his omega perfect—tight heat clenching like velvet vice. "So good... perfect for me." He thrust deep, rhythmic, hips snapping as Megumi's nails raked his back, drawing blood that healed instantly under alpha regen.
Heat built: Yuuji's hand between them, stroking Megumi's cock in time with his pounding, thumb circling the tip. "Come for me, omega—wanna feel you milk my knot." Megumi shattered first, crying Yuuji's name as ropes painted their stomachs, walls fluttering wildly. Yuuji followed with a roar, knot swelling thick, locking them as he flooded Megumi with hot seed—pulse after pulse, until it leaked around the seal.
They collapsed, knotted and panting, Yuuji nuzzling sweat-damp hair. "No money, no business. Just us. Love you, Megumi."
Megumi, boneless and blissed, traced Yuuji's jaw. His scent wrapped them both now—mingled, content. "Idiot... love you too. Stay knotted till dawn."
~~~
Gojo crashed their breakfast the next day (literally, through a window). "Eww, you two reek of post-knot cuddles. Spill—did the rizz work?"
Yuuji, feeding Megumi strawberry mochi from his fingers, grinned. "Like a charm. Jealous?"
Megumi smirked, leaning into his alpha. "Troll elsewhere, Gojo."
As Gojo vanished in a huff, Yuuji whispered spicy promises for round two. The clans thrived; their bond? Unbreakable, heated, forever.
~~~
Three Weeks Post-Wedding
The Zenin-Kamo estate hummed with fragile peace, but Megumi felt it building—a restless itch under his skin, cedar scent sharpening to desperate pine. Inhibitors failed; his heat crashed early, triggered by the bonding bite Yuuji had left on his neck during their honeymoon. He locked himself in their suite, shadows coiling like frantic guards, hating the vulnerability.
Yuuji pounded on the shoji door, voice muffled but urgent. "Megumi! I can smell it—your heat. Let me in, please. I'll take care of you."
"Go away," Megumi growled through gritted teeth, curled on the futon in sweat-soaked robes, slick pooling beneath him. His body burned, cock hard and aching, omega instincts screaming for his alpha. But pride held: He'll think it's just clan duty—breeding for heirs.
The door rattled—Yuuji's strength barely contained. "Not leaving you alone like this. You're my omega. Mine. Open up, or I'll break it down."
A shadow tendril unlocked it. Yuuji burst in, eyes dark with alpha haze, cinnamon scent thickening the air like spiced smoke. He stripped off his shirt in one fluid motion, muscles rippling, cock already tenting his pants. "Fuck, Megumi... you smell like heaven in hell."
Megumi whimpered involuntarily, thighs clenching as another wave hit—fever spiking, slick gushing. "Don't—ahh—pity me. Just... knot me already."
Yuuji knelt, gathering him close, hands gentle despite the feral glint. "Pity? This is honor. Gonna fuck you through every wave, love." He kissed Megumi fever-hot, tongue delving deep, swallowing moans as he stripped them both bare.
~~~
Yuuji laid Megumi on silk sheets, spreading his legs wide. Slick glistened on pale thighs, omega hole fluttering emptily. "So wet for me already." Yuuji dove in, tongue lapping broad strokes from taint to clit-like nerves, sucking greedily. Megumi arched, "Yuuji—tongue deeper—" Fingers tangled in pink hair, hips grinding shamelessly. Yuuji obliged, fucking in with his tongue, nose bumping sensitive folds while two fingers plunged alongside—scissoring, curling to hit prostate dead-on. Megumi came with a sob, squirting slick over Yuuji's face, but the heat demanded more.
Yuuji rose, cock slapping heavy against Megumi's thigh—thick, veined, pre-cum beading. "Ready, omega?" He thrust in one smooth stroke, bottoming out in tight, rippling heat. Megumi keened, nails drawing blood from broad shoulders. Yuuji set a brutal pace—hips snapping, balls slapping wetly, free hand jerking Megumi's cock in tandem.
"Come inside—breed me—" Megumi babbled, lost to instinct. Yuuji growled, knot swelling at the base. "Fuck yes—take my knot." It popped in with a obscene schlick, locking them as he came—ropes of thick cum painting Megumi's walls, pulsing endlessly. Megumi clenched around it, milking every drop, his own release spilling between them.
They panted, knotted tight, Yuuji nuzzling the bond bite. "First wave down. How many more?"
Megumi shivered, aftershocks teasing. "Days... idiot. Don't stop."
~~~
Hours later, knot deflated enough to pull out—cum and slick flooding free. Megumi straddled Yuuji this time, impaling himself reverse, ass facing his alpha. "Watch me take it." He rode hard, bouncing on that massive cock, shadows dancing wild on the walls like a cursed ritual.
Yuuji gripped hips bruisingly, thrusting up to meet him. "Gods, your ass—perfect, squeezing me so good." One hand reached around to pinch Megumi's nipples, rolling the sensitive buds until milk-like beads formed (omega heat quirk). Megumi moaned, pace faltering as prostate abuse made his vision white out.
"Alpha—knot again—please—" Yuuji sat up, flipping them chest-to-chest, pounding relentlessly until his knot ballooned once more, flooding Megumi anew. They came together, Megumi's cock trapped rubbing between sweat-slick abs.
~~~
By nightfall, exhaustion warred with need. Yuuji built a nest—blankets, their wedding robes, scent-soaked pillows—cradling Megumi like fragile glass. Spooned from behind, Yuuji slid in slow this time, lazy thrusts building to frenzy. "Love you like this—vulnerable, fierce, mine." His hand worked Megumi's cock tenderly, whispering praises: "Strongest omega... my head, my love..."
Megumi broke, tears mixing with sweat. "Yuuji—love you—knot me forever." The final knot swelled huge, cum overflowing as heat crested, then ebbed. They stayed locked till dawn, Yuuji's purr rumbling through them both.
~~~
Megumi woke sated, body sore but glowing, marked inside and out. Yuuji fed him rice porridge laced with herbs, kissing every bite. "Survived your first married heat. Told ya—not business. You're my world."
Megumi smirked weakly, pulling him down for a lazy kiss. "Round four later. But... thank you, alpha."
Cue Gojo's infinity-breach at breakfast: "Ew, heat nest reeks! Itadori, you knot-junkie—details!"
Yuuji grinned, arm around Megumi. "Private, sensei. Buzz off."