Chapter Text
Kusuo let himself float away on the current of thoughts sweeping through Kusuke’s mind, the soothing rush taking him in instantly. His brother’s psyche was like an ocean, endless waves of ideas and projects crashing intermittently along the surface. Its depth was unfathomable, and for the teenager this was as comforting as the real seafloor itself.
Kusuke’s mindscape had now become so familiar that he didn’t register his mental stream of consciousness as an interruption—more like a needed addition to his own.
He sighed as Kusuke one-handedly picked up his manuscript again, only half-concentrated on it this time. His other arm was keeping Kusuo close, caressing his back from top to bottom in a nonsensical pattern.
I should really finish this tonight — Kusuo feels so relaxed I hope he enjoyed the quiet — That paragraph is outdated; I could dismantle it with barely two sentences — Should I add germanium to his room at home? No, I don’t want him unaware when I’m not here.
He turned a page, the scrape of paper overshadowing for a second the stream of thoughts that Kusuo was listening intently to.
That, however, should be useable … what’s the study they’re quoting? —Unless I add some cameras to check over him whenever he’s near germanium, but I’m not sure I’d be able to intervene quickly enough. A drone, maybe? —Hmm I need to edit this.
Kusuo’s lips upturned in a small smile. His brother had provided the most unexpected gift, yet he was still trying to upgrade it somehow. He didn’t really want to cut in, but … well considering Kusuke’s thoughts, the scientist was already pretty distracted.
‘It’s fine to keep the room in your laboratory. I prefer you to be here.’
Kusuke’s mind reflected his slight bemusement at Kusuo’s interruption but was soon crowded with a pressing sentiment of love. As familiar as he was by now with the possessive, obsessive passion his brother had for him, Kusuo was still warmed from the inside out.
The feeling was so powerful that there was a lot of transference. And considering that he himself had quite deep emotions towards Kusuke already, it was sometimes like an overspill occurring inside him.
He raised his head to kiss Kusuke, enjoying again the slight surprise this provoked—he rarely was the one to initiate their more physical interactions, and yet he had done so twice in the same day. According to Kusuke, the times it had happened could be counted on one hand. I shouldn’t be surprised he’s keeping track…
When he left his brother’s mouth, Kusuke’s other hand grabbed on his thighs to replace Kusuo’s body more firmly against his. The scientist reclined fully against the back of his chair, leaning Kusuo with him.
“Of course, if that’s what you prefer it’ll stay that way. I’ll keep my telepathic headband nearby, then —
‘No.’
Kusuo blushed as Kusuke’s mind suddenly prioritized one task, analyzing why Kusuo would interject.
‘That’s not … that won’t be necessary.’
He tensed under Kusuke’s scrutiny. Being the point of focus of all his concentration when he really got serious was a thrilling feeling. He knew Kusuke would rapidly enough infer why he’d said this. And the idea of admitting his embarrassing solitude when he was left without access to his brother’s thoughts added to the heat on his face.
Indeed, the scientist’s inquisitive look quickly broke into a half smile.
“Were you lonely, baby?”
Kusuke was very pleased his work had yielded such adorable results. A thankful and blushing Kusuo in his lap, how lovely! Better yet, he now had proof that his little darling did love him, enough to miss him even when they were in the very same room.
‘Of course I do, don’t be stupid.’
Right, his baby brother didn’t like Kusuke doubting this. The scientist’s smile turned soft as honey, as it often did whenever Kusuo was concerned. He kissed a pink cheek, then his brow, his temple—wherever he could reach.
Kusuo eventually leant up to kiss him properly again, tired of all the teasing touches. His arms encircled Kusuke’s neck, his torso half-twisting to make the position easier. Kusuke let one of his hand fall to his brother’s ass, both supporting him and pushing him more squarely in his lap.
He opened his mouth for Kusuo, who shyly intertwined their tongues, moving slowly, languorously. But then again, to Kusuke everything that Kusuo did seemed passionate. He lived for the moments the teenager showed him affection and allowed Kusuke to shower him with love in return.
They kissed for a few minutes, barely sighing to take their breaths. As always, Kusuo’s mouth was very sweet, and it was a pleasure to lose himself in the sensual glide of their tongues as his hands caressed any part he could reach of his brother’s lower back and thighs.
He let himself be led, eventually breaking the kiss when he felt Kusuo move his hips, searching for pressure. “Don’t you want to move to a more suitable position?” asked the scientist not so innocently. He was mostly thinking of getting Kusuo on a flat surface to have better access … and was utterly speechless when his brother only sat up, sliding one leg on the other side of his lap and pressing close to him again.
Kusuo’s lithe body was now plastered over his and Kusuke swallowed, hands falling once more on his darling brother’s ass. He couldn’t resist the need to grasp it a bit meanly, feeling his fingers sink into the smooth material of his pants and the supple skin underneath.
Doing so brought their hips that much closer, and he felt an unmistakable erection pushing against his own cock. He looked slightly up into the violet eyes, regretting the presence of the green-tinted glasses. “Are you comfortable now, baby?” Kusuke thrust up purposefully, offering more friction to Kusuo. “Feeling good?”
He watched his brother’s mouth fall half-open around a silent moan. ‘Yes. Give me more.’
Kusuke laughed. “So spoiled…” As he took Kusuo in another kiss, he reluctantly let go of his ass and reached around to unfasten his belt and pants buttons. “Come on love, move up for me.” The teenager half-rose on his knees to help Kusuke lower both articles of clothing just enough for his cock to slip free.
As he sat again on Kusuke’s thighs, the scientist wasted no time before grasping the pink cock and smoothly stroking it once, twice, all the way from base to top. Kusuo gasped audibly at this, and a bolt of pure desire went through Kusuke’s spine. Getting him verbal during intimacy was always so very alluring.
Kusuo started kissing the column of his neck, leaving open-mouth, wet marks under his jaw before sliding lower and nipping at the skin just above his collar. Considering his state, this wasn’t the time for finesse. Not that Kusuke felt very much like taking this slow either.
He let his head fall back, giving more room to work to his darling brother, reveling in the gentle bites he was imprinting on every inch he could reach. He kept on stroking Kusuo’s cock with one hand, the other coming up to hide itself in pink hair, pressing the teenager closer on a particularly enjoyable glint of teeth.
Kusuo eventually reclined back, leaving his bruised throat naked without the heat of his mouth. Kusuke opened his eyes—when had he even closed them?—to meet his brother’s gaze inquisitively.
‘I want to touch your cock.’
Fuck that was hot.
“Go on baby, I’m all yours.” Kusuke stopped momentarily his movement as Kusuo swiftly unzipped his slack pants to take out his erection, above the waistband of his boxers. The scientist only slightly shifted to help drag them down a bit so they wouldn’t be too much of an obstacle. Kusuo then carefully grasped him. He started to stroke his cock, deft hand angling it just so to have better access to the whole length.
Kusuke groaned, adjusting his legs under his brother’s ass. “Just like that Kusuo, you’re making me feel so good.” The teenager lifted his gaze from his brother’s lap, before shuffling even closer, until his hand brushed against Kusuke’s still wrapped around his own cock.
With a look, Kusuke understood what Kusuo intended to do and removed his own hand, letting his baby brother enclose both their cocks in his slender fist. They were now pressed together, Kusuo barely managing the fit, his fingers not closing fully around them both.
The feeling of his brother’s cock was lovely, the hard flesh not yielding any against his—some drops of pre-cum were sliding down the tender skin, leaving behind a trail of rapidly cooling stickiness.
Kusuke couldn’t prevent his hips from jolting up. Kusuo shushed him, loosening his grip a second. ‘Let me.’ The blond groaned again at the quiet command, trying to relax his tensed muscles. Alright, if Kusuo wanted to take charge, he would do his best to comply.
After assuring himself of Kusuke’s obedience, Kusuo looked back to the situation at hand. The heat between their bodies was overwhelming, as much as the passionate thoughts swarming his brother’s consciousness. There was such a deep current of love, and affection, and desire that it turned Kusuo’s head.
His grip tightened again—no use, his reach wasn’t enough to wrap fully around both their cocks. Oh well, that would still do. He placed his other palm on Kusuke’s shoulder for balance and thrust his hips in rhythm with the slow stroking movement of his hand, concentrating on the smooth glide.
The motion was nearly hypnotizing, the even sway of his hips letting him focus all the more on Kusuke’s stream of consciousness, entirely consumed by thoughts of Kusuo. He saw himself through his brother’s understanding of him, heard the admiration and love seeping in every breath.
So pretty, so lovely on my lap, I want you so bad, Kusuo, Kusuo, Kusuo—The teenager threw his head back, limbs stuttering, overwhelmed by the frantic litany Kusuke’s lips hadn’t even needed to say out loud. ‘Kusuke … give me your hand.’ A beat of surprise before the elder complied, losing his white-knuckle grip on the armchair and reaching down to join Kusuo’s hand on their cocks.
The teenager intercepted it, bringing it up to his lips and licking a wide stripe down the palm, before teasingly inserting two fingers in his mouth when Kusuke’s thoughts stopped to a sudden halt. He took them in fully, before letting go with an exaggerated popping noise.
Kusuke’s mind was frozen on a lot of dirty thoughts involving his fingers or Kusuo’s mouth, but that wasn’t quite what Kusuo wanted right now.
He guided the wet hand down again, enclosing it with his own around their erections. He let out a small moan, ‘Your hand is bigger than mine, it’s perfect.’ He gave a tentative hip thrust, biting on his bottom lip when Kusuke got his wits back and tightened his grip, using the wetness to jerk them off more forcefully than Kusuo had been doing.
Kusuo bent down to reward his brother, left hand sliding from Kusuke’s pectoral to his nape and orienting his head upwards until his mouth was hovering above the other’s.
‘Give us more, Kusuke.’