The porch boards held the day's heat, warm and rough under bare feet, and the thick morning air breezed past Katsuki's head as he sat in the swing, one hand wrapped around a coffee mug, the other resting on his thigh. He'd heard everything from the stables — the truck pulling in hours early, the muffled sounds that followed, the familiar rhythm of two bodies finding each other again — and he'd stayed right here, letting them have their privacy, letting the coffee burn his tongue and the morning light creep across the weathered wood. His robe hung loose around his shoulders, tied carelessly at the waist, exposing the broad expanse of his chest and the dusting of silver-grey hair that spread across his pecs and trailed down his stomach. He took another sip and let the quiet settle around him.
The screen door creaked open behind him, and he didn't need to turn around to know who it was — he could smell Izuku before he saw him, that particular warmth of sleep still clinging to his skin, the faint sweetness of the soap he'd used the night before. When he did glance over his shoulder, the coffee mug paused halfway to his lips.
Izuku stood in the doorway wearing nothing but one of Katsuki's old button-ups, hanging open and unbuttoned, the fabric gaping wide to expose the full curve of his small tits, the puffy pink nipples already tightening in the cool morning air. The shirt fell to his mid-thigh, but it didn't cover the soft swell of his hips or the smooth mound between his legs, visible every time the breeze caught the fabric. He was rubbing his eyes with the heel of his palm, messy green curls sticking up in every direction, utterly unselfconscious in a way that made Katsuki's chest ache.
"Papa?" Izuku's voice was thick with sleep, raspy and warm. "What's all that noise? I heard — I thought I heard someone yelling, or —" He blinked, squinting toward the stables where the sounds of early morning activity had quieted into something more intimate. "Is everything okay?"
Katsuki took a slow sip of his coffee, letting his gaze travel the length of Izuku's body before meeting his eyes. "Eijiro's brother showed up this morning." He said the fact like it explained everything, and damn near it did. "Drove through the night apparently."
Izuku's face split into a wide, genuine smile, the kind that crinkled the corners of his eyes and made his freckles dance across his cheeks. "Really? His brother? That's — that's so good." He tucked a strand of messy green hair behind his ear, still blinking away sleep. "Eijiro sounded so sad last night when he was talking about them. Like it hurt to even mention him. And now they're —" He tilted his head, listening to the distant sounds drifting from the stables, a low laugh followed by something softer, something intimate. "They sound really happy, Papa."
Katsuki grunted, taking another sip of his coffee, but the corner of his mouth twitched. "Glad the kid’s happy. He deserves it." He shifted on the swing, the wood creaking under his weight, and Izuku caught the subtle adjustment — the way his thighs spread a fraction wider, the way the loose robe fell open just a little more. "Looks like we got another mouth to feed. Boy's probably gonna move in."
Izuku giggled, the sound light and warm in the morning air. "That's perfect. This place is so big, and Eijiro's been alone in that guest room — now he'll have someone." He stretched his arms above his head, the unbuttoned shirt falling open completely, baring his small chest to the morning light, his nipples tightening in the cool breeze. He was still half-asleep, still soft and unguarded, and it took him a long moment to realize Katsuki had gone very, very still.
His gaze dropped, following the line of Katsuki's body — the broad chest, the flat stomach, the dusting of silver hair that trailed down and disappeared beneath the loose knot of his robe. And there, pressing against the thin fabric, unmistakable and massive: Katsuki's cock, fully hard, straining against the cotton, the thick silhouette of it visible even through the robe's folds. The tip was just barely peeking past the fabric, flushed and slick with a bead of precum that caught the morning light.
Izuku's thighs pressed together involuntarily, a rush of heat flooding through him, and he felt his own body respond — his cunt clenching around nothing, slick and ready. He looked up at Katsuki's face, those crimson eyes dark and watching him, and his voice came out small and curious instead of accusing. "Papa... you're hard."
Katsuki exhaled slowly, setting the coffee mug down on the arm of the swing with a deliberate clink. "Been listening to those two go at it for hours." His voice was rough, gravelly, the words coming out low and heavy. "You think I could hear all that and not react?" He didn't look away, didn't bother hiding it. His hand moved to the robe's tie, not to close it, but to loosen it further. "Body does what it does, kid."
Izuku felt his pulse hammering in his throat, but instead of blushing and looking away, instead of retreating into that nervous shell he always wore, he stepped forward. His bare feet pressed against the warm porch boards, and he positioned himself directly between Katsuki's spread thighs, the rough wood of the swing frame at his back. He looked down at Katsuki's cock — thick, heavy, the foreskin pulled back just enough to reveal the flushed head — and then back up at his grandfather's face.
With deliberate slowness, Izuku held the edges of the unbuttoned shirt and pulled them wider, baring himself completely. His small tits, peaked and pink. The soft curve of his belly. The damp mound between his thighs, where his cunt was already glistening, slick and swollen and hungry. He licked his lips, and his voice came out soft, innocent, the barest hint of a question in it. "Can I make you feel better, granddaddy?"
Katsuki's cock jumped. A visible, desperate twitch against his stomach, another bead of precum welling at the tip and sliding down the thick shaft. His hands gripped the swing's chains, knuckles white, and his jaw tightened as he looked at Izuku standing there, open and offered and utterly his. The air between them went thick and charged, the sounds from the stables fading into background noise, the whole world shrinking to this single moment.
Izuku's breath caught as he sank to his knees, the rough porch boards pressing into his bare shins, the morning air cool against his exposed skin. He reached out with trembling fingers and tugged the loose knot of Katsuki's robe, pulling it open completely, letting the fabric fall away to reveal the full expanse of his grandfather's body — the broad chest, the flat stomach dusted with silver hair, and there, between his spread thighs, that massive cock standing thick and heavy, the foreskin pulled back exposing the flushed, leaking tip. But Izuku's eyes dropped lower, to the heavy sac hanging beneath, full and hairy and dark with age, the skin wrinkled and soft-looking, the weight of them making his mouth water. He swallowed hard, his cunt clenching around nothing, a fresh slick of heat flooding between his thighs.
"Granddaddy," Izuku breathed, his voice barely above a whisper, reverent and aching. He leaned forward, pressing his palms flat against Katsuki's inner thighs, feeling the heat of his skin, the coarse hair prickling against his fingers. "These are the nuts that made my momma, aren't they?" He looked up through his lashes, green eyes wide and hazy with need. "Which means they made me too, in a way. I'm alive because of these." He didn't wait for an answer — he dipped his head and pressed his mouth to the heavy pouch, inhaling deep, filling his lungs with the musky, earthy scent of unwashed skin and sweat and something deeper, something that made his head swim.
The taste hit his tongue — salt and musk and the faint bitterness of old sweat, strong and raw, completely unwashed from the night before. Izuku moaned, the sound vibrating against Katsuki's sac, and he opened his mouth wider, taking as much of the loose skin as he could, sucking gently, feeling the weight of one testicle press against his tongue. He pulled off with a wet sound, licking a broad stripe up the underside, nuzzling his nose into the coarse hair, breathing him in. "Fuck, granddaddy," he mumbled, lips brushing against the hairy skin. "You taste so good. So fucking good. I could live down here."
Katsuki's hands came down, one gripping the back of Izuku's head, fingers threading through the messy green curls. His breath came in short, ragged bursts, and when he spoke, his voice was rough, strained, barely above a growl. "Fuck, baby boy. You keep doin' that — fuck." He shuddered as Izuku sucked another heavy mouthful of his scrotum, tongue working against the wrinkled skin, worshiping the weight of him. "Never had nobody — nobody ever —" He broke off with a groan, head falling back against the swing's chain. "Those balls been full for sixty-five years, and you're the first one to treat 'em right."
Izuku hummed in pleasure at the praise, the vibration making Katsuki's thigh muscles jump. He pulled back just enough to speak, his lips still brushing against the damp skin, his voice thick and slurry with lust. "They're so heavy, granddaddy. So full. I bet they've got so much cum in 'em." He licked a slow, wet circle around the base of Katsuki's sac, then sucked one testicle fully into his mouth, rolling it gently with his tongue, feeling the weight of it against his palate. He released it with a pop and looked up, eyes dark and hungry. "You gonna fill me up with all that cum, granddaddy? Gonna breed your own grandson with these old nuts?"
Katsuki's grip tightened in Izuku's hair, and he let out a sound that was almost a laugh, almost a sob, broken and raw. "Fuckin' — yeah, baby boy. Yeah." He pulled Izuku's face back against his balls, pressing him there, letting him nuzzle and lick and suck. "You keep talkin' like that, I'm gonna give you every drop I got." His other hand came down to stroke the side of Izuku's face, thumb brushing over his cheekbone, reverent and tender despite the filth spilling from his mouth. "Good boy. So good for me. Takin' care of your granddaddy's balls like a good little grandson."
Izuku whimpered at the praise, his hips grinding unconsciously against the empty air, his cunt aching and slick and desperate. He licked and sucked at Katsuki's sac, alternating between gentle kisses and deep, hungry pulls, tasting the salt and musk and the raw essence of the man above him. Each moan from Katsuki's throat sent a jolt of heat through him, and when Katsuki's cock twitched, a bead of precum sliding down the thick shaft, Izuku reached up and caught it on his finger, bringing it to his lips without breaking eye contact. He sucked his own finger clean, moaning at the bitter, salty taste, and then lowered his mouth back to the heavy balls, worshiping them like a shrine.
"You're gonna make me come just from this," Katsuki rasped, his hips bucking involuntarily, his cock slapping wetly against Izuku's cheek. "Fuck, baby boy — your mouth —" He took a shaky breath, his hand still tangled in Izuku's hair, guiding him. "Don't stop. Don't you fuckin' stop."
Izuku didn't stop. He kept his mouth on Katsuki's sac, sucking and licking and praising, whispering filthy things against the wrinkled skin about how these nuts were the reason he existed, how he wanted to taste every drop his granddaddy had ever stored up, how he'd spend the whole summer on his knees if that's what it took. The morning light crept across the porch, warming their skin, and somewhere in the distance, the sounds from the stables had gone quiet, but neither of them noticed. There was only this — Izuku on his knees, worshipping his grandfather's balls, and Katsuki above him, undone and utterly claimed.
Izuku's mouth worked against the heavy sac, his tongue tracing the wrinkled skin, his breath hot and wet against the sensitive flesh. He could taste himself on Katsuki's balls now, the salt of his own spit mixing with the musk of his grandfather's unwashed skin, and it made him dizzy with want. He pulled one testicle deeper into his mouth, rolling it against his tongue, feeling the weight of it, the promise of what it held, and he moaned around it, the vibration making Katsuki's thighs tremble against his cheeks.
Katsuki's hand tightened in his hair, a warning pull, and his voice came out ragged, strained, barely above a gravelly rasp. "Baby boy — fuck — I'm about to cum. If you keep — if you don't stop —" His hips bucked involuntarily, his cock slapping wetly against Izuku's forehead, leaving a smear of precum. "I'm gonna —"
Izuku pulled off with a wet pop, a string of saliva connecting his lower lip to Katsuki's sac. His eyes were dark, pupils blown wide, his face flushed and slick with spit and precum. He didn't hesitate. He pushed himself up, his knees complaining at the sudden movement, and in one fluid motion he swung his right foot up onto the porch swing, planting it on the wooden seat beside Katsuki's hip. The position spread his legs wide, baring everything — his small tits bouncing with the movement, the soft curve of his belly, and between his thighs, his cunt glistening and swollen, slick with arousal, the folds pink and greedy and dripping onto the porch boards below him.
"Don't waste it, granddaddy," Izuku breathed, his voice trembling with need as he reached down and wrapped his fingers around Katsuki's thick shaft. The skin was hot and silky, the foreskin pulled back to expose the flushed, leaking head, and he guided it upward, pressing the fat tip against his own soaked entrance. He rubbed it there, sliding the slick head through his folds, coating it in his own wetness, smearing precum and arousal together until he was trembling with the anticipation of it. "Don't waste a single drop. Every drop of your precious cum belongs to me. To my pussy."
Katsuki let out a sound that was almost a growl, his hands gripping Izuku's hips, fingers digging into the soft flesh hard enough to bruise. "Fuck, baby boy —"
"Feed it to me, granddaddy." Izuku's voice cracked, desperate and raw, as he tugged the rest of Katsuki's cock forward, aligning the tip with his entrance. He slid just the head inside, just the fat, flared ridge, and the stretch made his eyes roll back, his mouth falling open in a silent cry. He paused there, breathing hard, feeling himself clench around that invasion, already so full, already so close. "Give it to my cunt. Give it to my hungry little pussy, granddaddy. I wanna — I wanna give birth to my own aunt or uncle. I wanna carry your babies, granddaddy. Please. Please breed your grandson's pussy. Give me all that nut that helped make me."
Katsuki's composure shattered. His hands flew to Izuku's hips, gripping hard, and he pulled Izuku down onto his cock in one savage thrust, burying himself to the hilt. The heat of it, the tightness, the words still ringing in his ears — he was coming before he could stop himself, thick ropes of cum pumping deep into Izuku's cunt, filling him, flooding him, until it leaked around the seal of their joined bodies and ran down Izuku's thighs in warm, creamy streaks. He kept coming, his hips jerking, his cock pulsing, emptying what seemed like years of stored seed into his grandson's waiting body, and the only sound he could make was a broken, guttural groan of Izuku's name.
Izuku cried out, his head falling back, his body convulsing around the intrusion as Katsuki's cum filled him. He could feel it — hot and thick, spreading inside him, claiming him from the inside out. His own orgasm crashed through him without warning, his cunt clenching and releasing, a gush of clear fluid spraying across Katsuki's stomach and thighs as he squirted helplessly, still impaled, still being filled. "Yes — yes, granddaddy — breed me — breed your grandson's pussy —" The words dissolved into sobs of pleasure as he rode through it, his hips grinding down, taking every last pulse of Katsuki's release.
When it was over, they stayed frozen, locked together, Izuku's foot still braced on the swing, his body trembling and slick with sweat and cum. The morning sun had climbed higher, warming their skin, and somewhere in the distance a bird called out, oblivious to what had just transpired on the old porch. Izuku's breath came in ragged, shallow gasps, and he let his forehead drop to rest against Katsuki's, their noses brushing, their breath mingling.
"Granddaddy," he whispered, his voice wrecked and tender. "I can feel you inside me. I can feel you —" He swallowed hard, a fresh leak of cum sliding down his thigh. "Thank you. Thank you for filling me up."
Izuku's forehead pressed against Katsuki's, their breath mingling in ragged, humid bursts. The last few pulses of Katsuki's release were still throbbing deep inside him, a hot, thick flood that made his stomach flutter and his toes curl against the porch boards. He leaned in, catching Katsuki's mouth in a slow, deep kiss—tongue sliding against tongue, tasting the coffee and salt and something purely *him*. Izuku moaned into it, his hips grinding down in a tiny, involuntary circle, milking the last drops from Katsuki's softening cock.
"Wow. That was hot." The voice came from the bottom of the porch stairs, rough and appreciative, carrying a laugh that was unmistakably Eijiro's but deeper. Izuku's eyes flew open, but instead of shame, a jolt of pure, electric heat shot through him. He turned his head, still impaled on Katsuki's cock, and saw Tetsutetsu standing on the gravel path, one arm wrapped around a barely-standing Eijiro. They were both wearing their jeans, haphazardly buttoned, skin slick with sweat and hay dust, walking towards the house to clean up.
Eijiro's face split into that wide, genuine grin, his red eyes soft and warm despite the exhaustion in his legs. "Hey, boss. Izuku." His voice was hoarse but happy, the kind of hoarse that came from screaming a brother's name. "This is my brother, Tetsu. The one I told you about." He gestured loosely between the porch and the stables. "And, uh, I guess I gotta thank you two. You're the ones who inspired me to send that video last night. So, uh. Thanks for helping me grow a pair, I guess."
Tetsutetsu gave a big, easy smile that mirrored his brother's perfectly, his sharp red eyes sweeping over the scene on the porch—Izuku naked and glowing, Katsuki's hands still possessive on his hips, the glisten of cum on Izuku's thighs. "Seriously. Thanks for helpin' us figure our shit out, old man. I ain't seen my brother this happy in years." He paused, his grin turning wolfish, appreciative. "And, uh. Real talk? The two of you goin' at it like that? Sexiest fuckin' thing I've ever seen. No wonder Eijiro couldn't keep his mouth shut about it."
Izuku felt the words settle into his bones like a drug. *Sexiest thing they'd ever seen.* His cunt clenched involuntarily around Katsuki's still-hardening cock, and a fresh gush of heat slicked his thighs, mixing with the cum already leaking out of him. He liked this. He *loved* this. Being watched, being admired, being claimed so openly that strangers on the path could see exactly who he belonged to. He looked at Katsuki, green eyes dark and hazy, a question and a statement all in one look.
Without a word, Izuku pushed himself up onto his knees, Katsuki's cock slipping out of him with a wet, obscene sound. A thick rope of cum immediately slid down his inner thigh, creamy and white against his flushed skin, pooling on the porch boards. He turned around, his small tits bouncing with the movement, and squatted over Katsuki's lap, his back to his grandfather's broad chest, his face fully turned toward Eijiro and Tetsu. The position spread his legs wide, baring everything—the slick, swollen folds of his cunt, the gaping hole still pulsing with emptiness.
Izuku reached down with both hands, his fingers finding his own slick, swollen labia. He spread his pussy open wide, the pink inner flesh parting to reveal the raw, desperate hole, stuffed full and dripping with Katsuki's seed. Cum glistened on his fingers, thick and pearly, a fresh trickle oozing out of him and landing in warm splatters on Katsuki's thighs and the swing below. He held himself open, displaying the mess, the evidence, the claim. "Look," he breathed, his voice wrecked and proud, carrying across the yard. "Look at what my granddaddy put inside me. Look at how full he keeps his own grandson's cunt."
He reached behind him without looking, finding Katsuki's cock by memory, by instinct. He teased the fat, leaking head against his sloppy hole, rubbing it through the mess of their combined fluids, coating it in cum and slick before he slowly, deliberately, sank down in one smooth motion. The stretch made his eyes roll back, a desperate whimper escaping his throat as Katsuki's thick shaft filled him completely, displacing the cum inside him, pushing a fresh gush of it out around the seal of their bodies. He was so full, so used, so perfectly claimed.
He looked up at Eijiro and Tetsu, his voice thick with shameless need, cracking on the words. "Granddaddy... please. Please fuck me. Fuck me in front of them. I want them to watch. I want them to see you breed your grandson's sloppy cunt. I want them to know exactly who I belong to." He rocked his hips back, grinding down, feeling every inch of Katsuki's cock inside him. "Please, granddaddy. Give 'em a show. Fuck your grandson's hungry little pussy."
Katsuki didn't answer with words. His hands locked onto Izuku's hips, fingers digging into the soft flesh hard enough to bruise, and he pulled Izuku down onto his lap in a brutal, upward thrust. The sound of it—wet skin slapping against wet skin, the squelch of his cock driving into the overfull cunt—echoed across the porch and into the yard. Izuku cried out, his head falling back against Katsuki's shoulder, his mouth hanging open in a silent scream as his grandfather fucked up into him, fast and deep, every thrust pushing a fresh wave of cum out of him, painting their thighs and the wooden seat.
Katsuki's rhythm was relentless, a punishing, possessive pace that had Izuku bouncing on his cock, his small tits jumping with every thrust, his body completely surrendered to the fucking. Eijiro and Tetsu stood at the bottom of the stairs, watching, silent, their hands finding each other's as they witnessed the raw, filthy devotion unfolding on the porch.
"That's it," Katsuki growled against Izuku's ear, his voice a broken rasp between thrusts. "Show 'em. Show 'em who you belong to. Show 'em who fills you up."
Izuku sobbed, his orgasm crashing over him without warning, his cunt clenching tight around Katsuki's thick shaft, a fresh gush of fluid spraying across his own thighs and the porch as he squirted helplessly, impaled and displayed, the perfect, filthy picture of debauchery and devotion.
Katsuki's hips never slowed, never faltered, each drive of his cock punching a fresh sob from Izuku's throat. The sound of it—wet and rhythmic and utterly obscene—filled the morning air, the porch swing creaking beneath them in counterpoint. Izuku's body was a mess of sensation, every nerve ending alight, his cunt clenching and releasing in waves that wouldn't stop, each contraction milking Katsuki's shaft and sending another gush of clear fluid spraying across his thighs. It was everywhere, dripping off the swing, pooling on the warm boards beneath them, his own cum and Katsuki's mixed into a frothy white ring at the base of the old man's cock.
"That's it," Katsuki growled against his ear, his voice rough and wrecked, his breath hot and ragged. "That's my good little grandbaby. Takin' all of it. Takin' every inch of your granddaddy's cock." He drove deeper, harder, his balls slapping wetly against Izuku's ass, the sound sharp and filthy in the quiet morning. "You hear that, baby boy? That sound? That's your pussy beggin' for more. Beggin' for your granddaddy's seed." He reached around, his calloused hand splaying flat against Izuku's lower belly, pressing down, feeling the bulge of his own cock moving inside that tight, slick heat. "You feel that? Feel how deep I am? I'm gonna fuck a baby into you, Izuku. Gonna give you a little one to carry. Gonna make you give birth to your own momma's sibling."
The words hit Izuku like a physical blow, and he wailed—a high, broken sound that dissolved into a sob. "Yes—yes, granddaddy—give me a baby—please, please, fuck a baby into me—" His voice cracked, his words slurring together, drunk on the cock buried inside him. "I wanna—I wanna carry your baby, granddaddy—wanna give birth to it—wanna hold my own momma's little brother or sister in my arms—" He was babbling now, his mind dissolved into pure need, his hips grinding back to meet every brutal thrust. "Please—please, granddaddy—breed me—breed your grandson's pussy—make me a mommy—"
Katsuki's grip on his hips tightened, fingers digging in hard enough to leave bruises, and he let out a guttural roar as he slammed home, burying himself to the hilt. His cock punched past something—Izuku felt it, a deep, sharp pressure that made his vision white out, a barrier giving way as the thick head of Katsuki's shaft pressed into a new, tighter space. His womb. His granddaddy was fucking into his womb. The thought shattered what was left of Izuku's composure, and he came again, a fresh gush of fluid spraying across the porch, soaking Katsuki's thighs and the swing and the boards below.
Katsuki kept thrusting, short, savage pumps now, each one pushing deeper into that sacred space inside his grandson, his cock pulsing with the force of his approaching release.
"Take it," he snarled, his voice barely human. "Take every fuckin' drop. I'm gonna fill you up so full you'll be leakin' for days. Gonna paint your womb with my cum until there's no room for anything else. You understand me, baby boy?"
His grandfather's hips stuttered, his rhythm breaking, and with one final, brutal slam, he came. Izuku felt it—a hot, thick flood emptying deep inside him, impossibly deep, filling his womb until there was no more room, until it spilled back out around the seal of their bodies, a frothy white mess dripping down onto the porch.
And then Izuku's bladder let go.
It wasn't a trickle—it was a flood, hot and relentless, gushing out of him in a thick, steady stream that splashed against Katsuki's cock, soaked the porch swing, and ran in rivulets across the wooden boards. He couldn't stop it, couldn't even try, his body completely beyond his control, every muscle slack and surrendered as he pissed all over his grandfather, all over the porch, a dark, spreading stain that pooled beneath them. Some distant, coherent part of his brain was mortified—the twins were watching, they could see everything, they could see him lose control like a child—but the rest of him was drowning in the impossible pleasure of being so full, so claimed, so completely undone.
Izuku whimpered, the sound small and wrecked, and buried his face against Katsuki's neck. "S-sorry—I'm sorry, granddaddy—I couldn't—I didn't mean to—"
Katsuki's arms wrapped around him, pulling him close, holding him through it. His voice, when it came, was rough but tender, stripped of everything but warmth. "Don't you fuckin' apologize, baby boy. You did perfect. You did so fuckin' good." He pressed a kiss to Izuku's temple, then another, his hand stroking down Izuku's sweat-slick stomach. "That's the second time you've lost control for me. Means you trusted me enough to let go. Means I took such good care of you that your body just... gave in. That's beautiful, baby boy. That's the most beautiful thing in the world."
From the bottom of the porch stairs, a slow, deliberate clap broke the silence. Then another. Eijiro stood there, his arm still around Tetsu's waist, his face split in a grin so wide it crinkled the corners of his red eyes.
"Holy shit," he said, his voice hoarse with genuine awe. "That was—" He let out a breathy laugh, shaking his head. "That was the most incredible thing I've ever seen in my life. Seriously. You two are somethin' else."
joined in, his claps slower, heavier, a broad smile on his face. "Yeah. No shit. That was a fuckin' performance. I'm clappin' for you, man. That took stamina."
Izuku's face burned, but a dizzy, giddy laugh bubbled up from his chest. He was still impaled on Katsuki's cock, still full of his grandfather's cum, still soaked in his own piss, and the twins were clapping for him. The absurdity of it—the beauty of it—made his eyes sting with unexpected tears. He turned his head, looking down at Eijiro and Tetsu through blurry vision, and managed a weak, trembling smile.
"Th-thank you," he whispered, and then laughed again, the sound wet and broken and utterly happy. "I—I don't know what to say."
Katsuki kissed him then, slow and deep and tender, his tongue sliding against Izuku's, tasting his tears and his sweat and the salt of his skin. When he pulled back, his crimson eyes were soft, softer than Izuku had ever seen them, and his voice was a gravelly whisper meant only for his grandson.
"You did so good, baby boy. So fuckin' good. I'm proud of you." He pressed another kiss to Izuku's forehead, then his nose, then the corner of his mouth. "My good little grandbaby. My perfect little baby boy."
Izuku couldn't help but melt into his grandfather's lap, even more than he already had. This was true happines. He preyed for it to never end, even though he knew that it would have to.