Chapter 1: Somnolent Surrender
The first thing he knew was the heat.
It seeped through the haze of sleep, a wet, insistent pressure that drew a low groan from his chest before his eyes even opened. The room was still dark, the world held in that silent, gray hour just before dawn. Shadows pooled in the corners of his bedroom, deep and velvety, but the air was alive with sound—the slick, quiet slide of flesh, a choked little whimper, the creak of the bed as a small weight shifted.
Sukuna’s hand moved before his mind did, fingers threading into the silken spill of black hair fanned across his stomach. He tightened his grip, not enough to hurt, just enough to feel. To own.
He looked down.
Megumi was a pale shape in the gloom, her naked back a curve of moonlight as she bent over him. Her mouth was full of him, working with a clumsy, sleepy desperation. Her eyes were squeezed shut, dark lashes fanning against her cheeks, glistening with tears even in her half-sleep. A thin trail of saliva gleamed on her chin.
“Fucking hell,” he rasped, voice shredded from sleep and instant, brutal want.
Her whimper vibrated around him, a muffled plea. She tried to take him deeper, gagging softly, her small hands fisting in the sheets beside his hips. She’d learned this in her sleep, his greedy little sister. Learned to wake up like this, with the taste of him on her tongue and a hollow ache between her legs that only he could fill. It was his favorite thing about her.
He guided her head with that firm grip, setting a slow, deep rhythm. “That’s it. Just like that. Take what you need, Megumi.”
She cried in earnest then, a shattered sound, but her hips rocked back against nothing, seeking friction. She was always so empty without him. He’d made sure of that.
With a snarl that was half triumph, he yanked her up by the hair. She gasped, her eyes flying open—wide, dark, and utterly unfocused, still swimming with dreams and him. He flipped her onto her back in one rough motion. The pillows swallowed her cry. She was so small under him, every delicate rib visible, her chest rising and falling in frantic little pants. He palmed one of her small breasts, his thumb scraping over the nipple until it pebbled tight.
“You sleep naked for me now,” he muttered, bending to bite at the juncture of her neck and shoulder. He tasted salt and lavender soap. “My perfect, dirty secret. You dream about this, don’t you?”
“Yes,” she breathed, the word breaking into a moan as he positioned himself. Her legs wrapped around his waist of their own volition, heels digging into the small of his back.
“Say it.”
“I dream… I dream about you.” Her voice was a threadbare whisper, raw from sleep and use.
He didn’t make her wait. He drove into her, one brutal stroke that buried him to the hilt in her wet, clutching heat. Her back arched off the bed, a silent scream shaping her mouth. She was so tight, always so impossibly tight, like her body forgot every time and had to relearn the stretch and burn of him.
He set a punishing pace, because she could take it, because she loved it. The headboard slammed a dull rhythm against the wall. Each thrust punched a broken sound from her lungs—half-sob, half-sigh. He watched her face, addicted to the unraveling there: the flicker of pain that melted into dizzy pleasure, the way her lips parted and her eyes lost all thought, seeing only him.
“My good girl,” he grunted, sweat beading on his temple as he fucked her harder. “My beautiful, fucking ruin. Look at you. Nothing but a warm, wet hole for your brother. Is that all you are?”
“Yes,” she sobbed, her nails raking down his shoulders. “Yes, Sukuna.”
“Pathetic.” The word was a caress. He swiveled his hips, hitting a spot that made her see stars, her whole body seizing. “Mine.”
The room lightened by degrees. The shadows in the corners softened from pitch to gray. A thin blade of golden dawn found a gap in the curtains and cut across the bed, painting a stripe of fire over her thigh, his pounding wrist, the join of their bodies. He could see everything now—the flush spreading across her chest, the tears drying on her temples, the utter wreck he’d made of her.
Her climax took her quietly, a sudden, deep tremble that rippled through her, her inner muscles fluttering around him in a frantic, silent pulse. She stared up at him, her eyes black and bottomless, filled with a devotion that tasted darker than sin.
It tipped him over the edge. He followed her down, spilling into her with a guttural sound that was more animal than man, his forehead dropping to hers as he rode out the last waves, his body shuddering.
For a long minute, there was only the sound of their ragged breathing mixing in the sharp, salted air. The room smelled of sex and sleep and them.
He finally pulled out and collapsed beside her, pulling her limp form against his side. She nestled into him immediately, her face pressed to the sweat-damp skin of his chest, one small hand splayed over his heart. He could feel her eyelashes fluttering against his skin as she fought to stay awake.
“You started it,” he said into her hair, his voice low and smug.
“I was asleep,” she murmured, the protest weak and without meaning.
“You’re always asleep.” He ran a thumb over the bruise forming on her hip. “You just can’t help yourself. Your body knows who it belongs to.”
She didn’t argue. She never did. He felt her lips curve against his skin, a faint, secret smile.
Outside, the world was turning blue and gold. A bird began to chirp somewhere. An ordinary morning was stitching itself together beyond the windows.
He held his sister closer, tucking the sheet over her nakedness, a possessive gesture. The sun was rising, sharp and clear, but it didn’t touch the deep, private dark they’d carved out here. It only illuminated what he’d claimed.
Her breathing evened out, slipping back toward true sleep. He stared at the ceiling, wide awake, one hand still possessively tangled in her hair.
Let the day come. It didn’t matter. She’d wake up needing him again. She always did.