Chapter Text
It began at fifteen, on a night soaked in neon and excess.
Their first gig had been a triumph, raw, electric, and unstoppable. The kind of performance that made strangers scream their names and the industry take notice.
High on adrenaline, cheap liquor, and whatever pills their new manager, Gojo Satoru, had pressed into their hands with a lazy grin, Yuuji and Sukuna stumbled into the afterparty already half out of their minds.
And once the door to that world cracked open, there was no closing it.
Sukuna had always been Yuuji’s. Not in the way the rest of the world understood brotherhood, but in something deeper, more primal. They had shared a womb. Sukuna came into the world only seven minutes before him, yet from the beginning, he had belonged to Yuuji in a way no one else ever could.
They invented their own language. They refused to be separated in school. When music became serious, they left classrooms behind entirely and learned chords and lyrics in the same breath. Sukuna encouraged every possessive instinct Yuuji harbored. He craved it. The way Yuuji looked at him like the rest of the planet was optional.
Like they were two halves of the same violent, hungry soul.
That night, the hunger finally tore through the last fragile barrier between them.
Molly burned through their veins, turning blood into liquid fire. The club’s bathroom was filthy, the bass still rattling the tiles, when Sukuna shoved Yuuji against the cold wall with a growl that wasn’t quite human.
His mouth found Yuuji’s neck immediately, teeth and tongue and raw need, while Yuuji’s surprised, broken gasp went straight to his cock. Someone pounded on the locked door.
They didn’t stop. They couldn’t.
They’d already kissed before, quick, stolen things in the back of the van or behind the stage when no one was looking. This was different. This was teeth and desperation and months of unspoken want finally snapping free.
“Are we really doing this?” Yuuji had whispered against Sukuna’s mouth, voice trembling with equal parts fear and want.
Sukuna had answered by biting down harder on his neck, fingers digging into Yuuji’s hips as he pressed their bodies together. “Yeah,” he growled. “We are.”
The kiss turned violent, messy, consuming. Sukuna’s hands roamed everywhere, under Yuuji’s cropped shirt, down the back of his tiny shorts, gripping his ass and pulling him closer until there was no space left between them. Yuuji moaned into his mouth, legs parting instinctively as Sukuna pressed a thigh between them, grinding hard against the growing bulge in Yuuji’s shorts.
They were both hard, both shaking, both too far gone to care about the pounding on the door or the fact that anyone could walk in at any moment.
When Sukuna finally pulled back, his lips were swollen and his eyes were dark with something feral. “Mine,” he said, voice rough. “You’ve always been mine.”
Yuuji nodded frantically, tears of overwhelming need pricking at the corners of his eyes. “Yours. Only yours.”
They didn’t make it back to the motel that night.
They fucked in the bathroom stall, fast, clumsy, and very desperate. Sukuna bent Yuuji over the sink, yanked his shorts down, and pushed inside him with almost no prep, only spit and pure need. Yuuji cried out, gripping the edges of the sink, the sound echoing off the dirty tiles as Sukuna fucked him hard and deep, one hand clamped over his mouth to muffle the noises.
“It hurts,” Yuuji gasped against Sukuna’s palm, voice breaking.
“It’s supposed to feel good. Just wait,” Sukuna growled against his ear, hips snapping forward again. “Relax for me, baby. Let me in.”
Yuuji whimpered, tears slipping down his cheeks, but he pushed back anyway, trying to take more. The pain slowly melted into something else. something hot and overwhelming and addictive. His legs shook. His cock leaked against the sink. Every brutal thrust made his vision spark white.
Sukuna didn’t last long. He came with a low groan, burying himself deep and filling Yuuji for the first time.
They stayed like that for a long moment, panting, Sukuna still inside him, forehead pressed to the back of Yuuji’s neck.
The next morning they woke tangled in the same bed in the shitty motel they’d been using since they were kicked out of their foster home.
Only this time it wasn’t for comfort or childhood nightmares.
This time it was because they were addicted.
And Sukuna had no intention of ever letting either of them sober up.