Chapter Text
Cosmos sat on yet another pile of space junk, looking down at the lit up planet beneath him. Cybertron was always alive, never truly sleeping. It seemed so much livelier than out here. Even with the occasional floating Gears, he had so little to do. There was only so much free time one little spaceship could entertain himself with.
He'd give up some of that easy time if it meant spending time with a certain shuttle with nice purple and brown plating, a handsome visor, and those strong hands. Cosmos wasn't a small bot, but Blast Off certainly made him feel small. Blast Off was just so strong, at least as far as he was told. It was hard to measure strength in the gravityless void of space.
Cosmos sighed and 'stepped' off of his pile, activating his thrusters to push the junk towards the tethered moon. A dedicated, vacuumed tube sucked down any junk that Cosmos needed to clean up, or if he needed to guide Gears to the attached ladder. He was still counting how many times he'd needed to pick up Gears.
He closed the lid and a blip appeared at the edge of his sensor. Not a second later, his commlink buzzed with a familiar tone. "Hey, Blast Off. Passing through?"
Blast Off chuckled deeply and Cosmos closed his optics at the deep sound. The shuttle had such a pleasant voice, it did things to his frame. "Yeah, got some delicate cargo and gotta go slow. Figured if I was passing through, I could take my time through this little patch of space. Got any issue with that?"
"No!" Cosmos felt his own thrusters sputter slightly at his own rapid response. He quickly faked a cough. "Ah, no, no problem at all."
Blast Off laughed, that deep voice warming Cosmos' very spark as he flew away from the inner moon and a distance away. "I'm just teasing." As if that was anything new. "Primus, wish I could get my hands on you again."
Cosmos let himself float on his back, stretching out his arms to disguise his low groan. "Mhm, I miss you too. We'll have to plan another cycle off together. Think that bar we went to last time is still open?"
"Should be, with the amount of supplies I gotta carry for it. Still better than passengers."
They both shared a laugh at that. "Never change, Blast Off." Cosmos smiled widely, twisting around with small bursts from his thrusters to look around in an attempt to see him. "So, what would you do if your got your hands on me again?"
Blast Off's grin cut right through his voice as he spoke, "Oh, you really wanna hear what I'd do to you?"
Cosmos clamped down both the shudder and the stutter that tried to escape him. "Yeah, I do."
"Hmm, you'd do let me do anything to you, wouldn't you? Especially if I get you under me, all heated up and pretty plating opened up. I can get all my digits in those seams, especially those tucked away under that chestplate. Toy with 'em, pull on 'em, maybe kink 'em up just to see you squirm."
Cosmos' own hands slid under his own chestplate and he flared his plating, following along with Blast Off's thorough description. Turning off his optics, he could easily imagine his warm digits were Blast Off's, plucking and teasing that sensitive wiring. Pushing out a shaky vent, he softly asked, "What next?"
"Think I'd put my teeth on those necklines right under that collar of yours. Gotta leave more marks, just for us to know about. Our little secret. Maybe I'd even bite hard enough to leave a mark deep enough to stay. Ya know, so it'll be there until the next time I get my hands on you."
Cosmos couldn't mimic that, but he still craned his helm back. Blast Off ran warm, always chasing off the chill of space that tried to cling to him. Still, in his mind's eye, he could feel Blast Off's teeth on his neck. The shuttle liked to leave lingering marks, especially where they could press against his collar and remind him of their presence.
"Yeah?" He was growing hotter, hanging onto every word from his deep voice.
"Uh huh. Figure I'll get you all worked up until those panels pop open, when you can't hold them closed anymore. Your lubricant would be leaking at those seams just from that little bit of teasing and I'll have no problem sliding in two digits. Your valve's just so soft and hot. Never felt anything like it before."
Cosmos groaned softly, sinking two digits into his own valve. Blast Off was always blunt with what he wanted, with how he felt. He was also and almost embarrassingly correct about how Cosmos' own frame responded. Lubricant gathered on his digits, and he pumped them slowly but roughly. Just like how Blast Off liked to do it.
"Fuck, Blast Off."
Blast Off chuckled deeply. "That's exactly what I'd do to you. Can't keep you on edge for too long. Gonna find that sweet spot deep in that plush valve and massage it just how you like until you overload all over my palm."
Cosmos thrusted his digits in deeply, but couldn't quite get that sweet spot himself. He settled for flicking his thumb over his node instead, lubricant gushing out of his valve and his calipers flexing around his digits. He moaned softly, his mask muffling the noises leaving his voxcoder.
He thrusted his digits harder, thumb flicking ver his node quickly. His thrusters activated as he overloaded over his hand, back arching. His voxcoder clicked as he moaned loudly, into the open void of space. His hips twitched and he span slowly around, the momentum from his thrusters lingering.
Through his commlink, Blast Off continued, "I wouldn't even waste time shoving my spike in you, even if you are still all sensitive. I'll fuck you right through another overload, I'll play with that pretty glowing node and get another overload out of that valve. I'll fuck you until I finally, finally sink in deep inside you and spill all my fluid right inside your plush valve. It'd probably spill out with how much I'll pump inside you."
Cosmos shuddered, gently tugging at his swollen node to keep himself on edge. "Ye-Yeah?"
"Uh huh. Fill you up and keep my spike in your valve until I get hard again and decide to fuck you some more. Primus, no one's gonna get me off of your pretty frame until my own spike starts to chafe. I'll be nice and kiss your valve, make sure it's all cleaned out and lubed up."
Cosmos groaned, his valve clenching around nothing. "When are you free again, exactly?"
A pair of strong arms wrapped around his midsection and that sinful, deep chuckle echoed directly into his audial. "Right now."