~~~Forbidden Brotherly Desire~~~ (pt 2)
What happens when a CUNTBOY is too desperate that he wants to satisfy his desire... with YOU?
Part 1 / Part 3 / Part 4 / Part 5 / Part 6 / Part 7 / Part 8
top!male reader, yandere cuntboy, desperate seduction, milky breasts, minor character, needy character, stepbrother relationship, wild imagination, smut, NSFW, masturbation.
Yuta's obsession with Y/N had twisted into a relentless fire, burning hotter with every failed attempt to draw his stepbrother closer. At sixteen now, still a teenager navigating the awkward edges of his body, Yuta's hormones raged unchecked, all fueled by thoughts of Y/N's strong frame and easy grin. Every night, alone in his room, he'd lock the door and strip down, fingers diving straight into his plump juicy cunt, slick walls clenching around them as he whispered to himself, This is all for you, Oni-chan. My body's so horny because of you. He'd pinch his heavy milky breasts, tugging at the swollen nipples until beads of milk leaked out, smearing them over his skin while grinding against his heel, chasing the release that only came when he pictured Y/N's cock buried deep inside him.
During the day, Yuta amped up his efforts, clinging to Y/N like a second skin. In the kitchen one morning, as Y/N poured coffee, Yuta sidled up front of him, pressing his big round ass against Y/N's thigh under the guise of reaching for a mug. The contact sent a jolt through Yuta's core, his cunt twitching with need, but he bit his lip hard to stifle the flush creeping up his neck. "Oni-chan, pass the sugar?" he murmured, voice steady despite the heat pooling between his legs.
Y/N handed it over with a casual chuckle, oblivious to the way Yuta's breasts brushed his arm, nipples hardening against the thin fabric of his shirt. "You're always underfoot lately, huh? Like a puppy." He ruffled Yuta's hair, the brotherly touch making Yuta's heart pound. Later that afternoon, while Y/N lounged on the couch scrolling through his phone, Yuta plopped right onto his lap without a word, settling his jiggling ass cheeks firmly against Y/N's crotch. He wiggled just enough to feel the warmth there, pretending to adjust for comfort as his own arousal built, pussy lips swelling and dampening his underwear.
"Yuta, c'mon, I'm not your chair," Y/N protested lightly, but his hands steadied Yuta's hips instead of pushing him off, fingers digging in just a fraction too long. Yuta forced a laugh, shifting so his heavy tits pressed back against Y/N's chest, but inside he was screaming—Touch me more, feel how wet I am for you. He stayed there until Y/N's phone buzzed with a text, finally sliding off with legs shaky and face carefully neutral, though his clit throbbed insistently.
The real escalation came at night. Yuta had been building up to it, faking restless sleep and tearful confessions about nightmares that haunted him—shadowy figures that only felt safe when Y/N was near. One stormy evening, after dinner, Yuta knocked on Y/N's door, eyes wide and glistening with manufactured tears. "Oni-chan… I had another bad dream. Can I sleep with you? Please? I don't want to be alone."
Y/N, sprawled on his bed in just boxers and a t-shirt, hesitated. He was eighteen now, freshly adult, and the lines felt blurrier. "Little one, you're not a kid anymore. It's… kinda unappropriate, you know? Get some sleep in your own room." But Yuta's lower lip trembled, his voice cracking as he clutched the doorframe, tears spilling over. "But it was so scary… You're the only one who makes it better. Please, Oni-chan?"
With a sigh, Y/N relented, patting the bed. "Fine, just tonight. C'mere." Yuta scrambled in, curling against Y/N's side as his stepbrother wrapped an arm around him protectively. The warmth of Y/N's body was intoxicating—solid muscle against Yuta's softer curves, the faint scent of his skin making Yuta's pulse race. They talked softly until Y/N's breathing evened out, his chest rising and falling in deep sleep, arm still draped loosely over Yuta's waist.
Yuta waited, heart hammering, until he was sure Y/N was out. The room was dark, lit only by moonlight filtering through the curtains. Slowly, he guided Y/N's hand lower, pressing the large palm against the swell of his heavy breasts. Y/N's fingers flexed unconsciously in sleep, and Yuta stifled a gasp as they cupped the milky flesh, thumb grazing a nipple. Yes, like that, Oni-chan, Yuta thought, his free hand slipping under the waistband of his shorts to rub his clit in tight circles. His cunt was already soaked, juices coating his fingers as he spread his legs wider, ass cheeks pressing into the mattress.
Emboldened, Yuta maneuvered Y/N's hand further down, over his soft belly to the heat between his thighs. He pushed two of Y/N's fingers against his puffy pussy lips, sliding them along the slick folds. Y/N mumbled something incoherent in his sleep, hand twitching, and Yuta nearly moaned aloud as the tips dipped inside, stretching his tight entrance. Burying his face into the pillow to muffle his whimpers, Yuta rocked his hips, fucking himself on Y/N's unmoving fingers while his own hand worked his clit furiously. It's you touching me, Oni-chan. Your hand in my wet cunt, feeling how much I need you.
His big round ass jiggled with each thrust, breasts bouncing heavily against Y/N's arm. Milk leaked from his nipples, soaking the sheets as pleasure coiled tight in his core. He imagined Y/N awake, eyes dark with lust, pinning him down and replacing those fingers with his thick cock, pounding into Yuta's juicy hole until he screamed. The fantasy pushed him over—Yuta's body tensed, cunt spasming around Y/N's fingers as he came hard, biting the pillow to swallow his cries. Waves of ecstasy rippled through him, leaving him trembling and spent, Y/N's hand still buried shallowly inside.
Carefully, Yuta withdrew the fingers, licking them clean in the dark—salty and sweet, tasting of his own desperation—before tucking Y/N's arm back around his waist. He snuggled closer, heart full and aching, knowing he'd beg for this again tomorrow. Y/N slept on, unaware of the line his little brother was so eagerly crossing.
Part 1 / Part 3 / Part 4 / Part 5 / Part 6 / Part 7 / Part 8
