Chapter Text
WARNING: SEX CHAPTER/STRONG LANGUAGE
Flashback
The hotel suite was bathed in soft golden light from the Tokyo skyline, floor-to-ceiling windows offering a view that cost more than most people's yearly salary. Izuku barely noticed. His eyes were locked on Katsuki—his husband—as the blonde loosened his tie with one hand, the other already working on his shirt buttons.
"You gonna stand there all fuckin' night, Deku?" Katsuki's voice was rough, but his eyes held that particular softness reserved only for Izuku. "Or are you gonna let me fuck my husband properly?"
Heat flooded through Izuku's body, the word 'husband' sending a fresh wave of slick between his thighs. They were twenty-six, established pro heroes, had been together for nearly eight years, but something about today made everything feel new. Sacred.
"Kacchan," Izuku breathed, and then he was moving, closing the distance between them.
Katsuki caught him easily, one arm banding around Izuku's waist as their mouths crashed together. The kiss was hungry, demanding, tasting of champagne and wedding cake and mine mine mine. Izuku's fingers tangled in ash-blonde hair, pulling slightly, and Katsuki growled against his lips.
"Fuck, I love you," Katsuki muttered between kisses, his hands already working at the buttons of Izuku's dress shirt. "Love you so goddamn much."
"I love you too," Izuku gasped as Katsuki's mouth moved to his neck, teeth grazing over his mating mark. The old scar tissue was still sensitive, and Izuku moaned when Katsuki sucked at it possessively. "Kacchan, please—"
"Patience, nerd." But Katsuki's hands were shaking slightly as he stripped Izuku's shirt away, followed quickly by the undershirt beneath. His red eyes darkened as he took in Izuku's bare chest, the lean muscle earned from years of hero work. "Fuck, you're beautiful."
Izuku flushed, even after all these years. "You've seen me naked hundreds of times."
"Yeah, and every fuckin' time I think about how lucky I am." Katsuki's hands slid down Izuku's sides, thumbs brushing over nipples, making Izuku arch into the touch. "That you chose me. That you're mine."
"Always yours," Izuku promised, fumbling with Katsuki's belt. "Since we were kids, Kacchan. Always."
Katsuki made a rough sound in his throat, something between a growl and a groan, and suddenly they were moving. Izuku found himself pressed against the windows, the cool glass contrasting sharply with the heat of Katsuki's body against his back.
"Gonna fuck you right here," Katsuki rumbled in his ear, one hand splayed across Izuku's chest while the other worked at his belt and zipper. "Want all of Tokyo to know you're mine. That Ground Zero's omega is the most beautiful fuckin' thing in this city."
Izuku whimpered, pressing his palms against the glass as Katsuki yanked his pants and underwear down in one smooth motion. The air conditioning made him shiver, or maybe it was anticipation. Slick was already dripping down his thighs, his body responding eagerly to his alpha's proximity, his scent, his touch.
"Kacchan," Izuku breathed, looking over his shoulder. Katsuki was still mostly dressed, just his shirt hanging open, pants undone. The sight made Izuku's mouth water. "You too. Wanna see you."
Katsuki's eyes flashed with heat. "Demanding little shit." But he stepped back just enough to shrug off his shirt, toeing off his shoes and socks before shoving his pants and boxer briefs down. His cock was already hard, flushed and leaking, and Izuku felt his hole clench with need. A need that was deeper with each time they had sex.
"Better?" Katsuki asked, voice rough with arousal.
"Perfect," Izuku whispered, reaching back for him. "You're perfect."
Katsuki caught his hand, bringing it to his lips and pressing a surprisingly gentle kiss to Izuku's knuckles—the same hand that now wore a simple platinum wedding band. "We both are," he said quietly, and then he was pressing against Izuku's back again, skin to skin, his cock sliding between Izuku's slick-wet cheeks. "We're perfect together."
Izuku moaned, rocking back against him. "Please, alpha. Need you."
"I know, baby. I know." Katsuki's hand slid down Izuku's stomach, fingers tangling briefly in dark green curls before dipping lower, finding Izuku's cock and stroking slowly. "Gonna take care of you. Always gonna take care of you."
His other hand moved between them, and Izuku felt thick fingers sliding through his slick, circling his entrance teasingly. He was so wet already, had been since Katsuki kissed him at the altar, and his body opened easily when Katsuki pushed two fingers inside.
"Fuck, you're soaked," Katsuki groaned, working his fingers deeper, finding that spot inside that made Izuku see stars. "This all for me, 'Zuku?"
"Yes," Izuku gasped, spreading his legs wider, one hand reaching back to grip Katsuki's hip. "All for you. Only ever for you."
Katsuki added a third finger, stretching him carefully despite Izuku's obvious readiness. He'd always been careful with Izuku, even when rough, even when Izuku begged for more. Years of intimacy meant Katsuki knew Izuku's body better than Izuku knew his own.
"Kacchan, I'm ready," Izuku whined after a few minutes of thorough preparation. "Please, need your knot. Need you to fill me up."
"Greedy omega," Katsuki teased, but his voice was strained. He withdrew his fingers, and Izuku heard the slick sound of Katsuki stroking himself. "Want my knot already? We've got all night, baby."
"Want it now," Izuku insisted, pressing his hips back. "Want to feel you for days. Want everyone to know I'm yours."
"Fuck." Katsuki positioned himself, the head of his cock pressing against Izuku's entrance. "You're gonna kill me, nerd."
He pushed in slowly, and Izuku's mouth fell open in a silent moan as Katsuki's cock stretched him wide. No matter how many times they did this, it always felt overwhelming, perfect, like coming home.
"So tight," Katsuki gritted out, one hand gripping Izuku's hip hard enough to bruise while the other braced against the window beside Izuku's head. "Even after all these years, you take me so fuckin' perfectly."
"Made for you," Izuku managed, his breath fogging the glass. "My body knows its alpha."
Katsuki bottomed out with a low groan, his hips flush against Izuku's ass. For a moment they stayed like that, connected completely, breathing hard. Then Katsuki started to move.
The first thrust punched a cry from Izuku's throat. The second made his knees weak. By the third, he was babbling, a stream of "yes" and "please" and "Kacchan" falling from his lips as Katsuki fucked into him with steady, deep strokes.
"Look at you," Katsuki growled, his hand sliding from Izuku's hip to his throat, not squeezing, just holding. A claim. "Taking my cock so good. My beautiful fuckin' husband."
Izuku could see their reflection in the dark window—Katsuki behind him, muscles flexing with each thrust, Izuku pressed against the glass, mouth open and eyes hazy with pleasure. They looked good together. They looked right.
"Harder," Izuku begged, and Katsuki obliged immediately, picking up the pace. The sound of skin slapping against skin filled the suite, mixed with their harsh breathing and Izuku's increasingly desperate moans.
Katsuki's hand slid from Izuku's throat down to his chest, fingers finding a nipple and pinching lightly. Izuku nearly sobbed at the sensation, his cock leaking steadily against the glass.
"Gonna knot you," Katsuki panted, his rhythm starting to falter. "Gonna fill you up so fuckin' good. You want that? Want your alpha's knot?"
"Yes!" Izuku cried out, clenching around Katsuki's cock. "Want it, need it, please Kacchan—"
"Then touch yourself," Katsuki commanded. "Come on my cock, baby. Wanna feel you."
Izuku's hand flew to his own cock, stroking frantically in time with Katsuki's thrusts. It only took a few pulls before he was coming with a shout, his release splattering against the window as his body clamped down on Katsuki's cock.
"Fuck, Izuku—" Katsuki's rhythm stuttered, and then he was pressing deep, his knot catching on Izuku's rim before popping inside. He came with a guttural moan, flooding Izuku with heat as his knot swelled, locking them together.
Izuku whimpered at the fullness, at the sensation of Katsuki's release painting his insides. His legs were shaking badly now, barely holding him up.
"I've got you," Katsuki murmured, wrapping both arms around Izuku's waist and carefully turning them, taking his weight as he sat back on the plush carpeted floor, Izuku in his lap. The shift made Izuku gasp, Katsuki's knot pressing against his prostate. "There we go. Comfortable?"
"Mmm," Izuku hummed, leaning back against Katsuki's chest. "Perfect."
They sat like that for a while, Katsuki's knot keeping them joined, his release still pulsing into Izuku in smaller spurts. Katsuki pressed kisses to Izuku's shoulder, his neck, the shell of his ear.
"Love you so goddamn much," Katsuki murmured. "Can't believe you're really mine now. Legally and everything."
Izuku laughed softly, reaching up to thread their fingers together, their wedding bands clicking against each other. "We've been mated for three years, Kacchan. Pretty sure I was already yours."
"Yeah, but now there's paperwork," Katsuki said, and Izuku could hear the smile in his voice. "Official government documents saying Midoriya Izuku belongs to Bakugou Katsuki."
"I didn't take your name," Izuku pointed out, amused.
"Yet," Katsuki corrected. "You said you'd think about it."
"I like my hero name too much," Izuku admitted. "Deku's kinda become my brand."
"That shitty nickname I gave you in middle school is your brand," Katsuki said dryly. "Figures."
"You gave me lots of things in middle school," Izuku said softly. "Not all of them were shitty."
Katsuki was quiet for a moment, then pressed a kiss to Izuku's mating mark. "I was a goddamn nightmare to you back then."
"We were kids," Izuku said, squeezing Katsuki's hand. "And you've more than made up for it."
"Still gonna spend the rest of my life making it up to you," Katsuki promised. His free hand drifted to Izuku's stomach, splaying across it. "Gonna give you everything you ever wanted."
Izuku's breath hitched. They'd talked about it—about kids, about family. They were both established heroes now, ranked #2 and #3 respectively. Financially stable. Married. It felt like the right time.
"You really want to?" Izuku asked quietly. "Start trying?"
"Yeah." Katsuki's voice was sure, steady. "Want a family with you, nerd. Want little green-haired brats running around with your smile and my attitude."
"God help us if they have your temper," Izuku laughed.
"They'll be perfect," Katsuki said firmly. "Because they'll be ours."
Izuku turned his head enough to catch Katsuki's lips in a slow, sweet kiss. "Okay," he whispered against his husband's mouth. "Let's do it. Let's have a baby."
Katsuki's answering smile was bright enough to rival the sun. "Yeah?"
"Yeah." Izuku settled back against him, Katsuki's knot still firmly locked inside him. "Maybe we just started. You know how potent alpha seed is during a knot."
"Don't get your hopes up for the first time," Katsuki cautioned, but his hand on Izuku's stomach was gentle, reverent. "Might take a few tries."
"Then we'll just have to practice," Izuku said with a grin. "A lot."
Katsuki huffed a laugh, nuzzling into Izuku's hair. "You're insatiable."
"Only for you."
They stayed there on the floor, wrapped in each other, until Katsuki's knot finally went down enough to slip free. Izuku whined at the loss, at the feeling of Katsuki's release starting to leak out of him.
"C'mon," Katsuki said, standing and pulling Izuku up with him. "Bath, then bed, then Round Two."
"Round Two?" Izuku asked, even as he let Katsuki lead him toward the massive bathroom.
"Told you we've got all night," Katsuki said, turning on the bathtub taps. "And I intend to make sure my husband is thoroughly fucked by morning."
Izuku flushed pink. "Kacchan!"
"What? You're the one who wants to practice making babies." Katsuki pulled him close, kissing him deeply. "I'm just being a dutiful husband."
And he was. Three more times that night, Katsuki knotted Izuku, filling him over and over until Izuku was boneless and satisfied and drifting in and out of sleep. The last thing he remembered before passing out completely was Katsuki's hand on his stomach, his voice rough with exhaustion and affection.
"Gonna be such a good mom, 'Zuku. Already know it."
Izuku had smiled, pressing his hand over Katsuki's. "You will be a great father too, Kacchan. The best."
If he'd known that was the last normal night they'd have for months—possibly forever—he would have stayed awake longer. Would have memorized every detail. Would have held on tighter. But he didn't know. So he slept, safe in his alpha's arms, dreaming of a future that felt bright and certain and within reach.