Chapter Text
He was imagining, he had to be. Starscream was coming home from a long cycle in the lab and decided he would come early to see his wonderful conjux, but nothing prepared him for the noise and sight he was about to encounter. There was his ex-lord and conjux interfacing with another mech, he stood stunned, angered, and disgusted. They had been together for five Vorns, so why now would Megatron… before he could think, he jumped into the air and transformed into the strong engine-powered F-22 raptor and took off. Not even bothering to decide the destination he was going to. Unknowing to him, Megatron heard his engines and immediately commed him. Starscream, however, didn’t bother to check the ping he received in his processor and continued blasting his way through the cybertronian skyscrapers before landing down at the only place he found comfort. Said place was a run-down cyber bar called “Swerve’s Bar” and he entered it, not even bothering to glare at the mech’s who stopped their conversations to look at him. He ordered a drink for himself and started ranting about his troubles to the owner, Swerve. Swerve loved his job as a bartender, he was always informed of drama and any juicy info he could get his servos’ on. At first, he was shocked seeing the ex-second-in-command Decepticon moping around, but he knew something bad must’ve happened.
“You look rough, mech.” swerve said concerningly as he gave the seeker another glass of engex.
“Think I don’t know that?” Starscream gumbled. “If you caught your conjux being fragged by another mech would you be happy?”
Swerved apologized and went on his way to serve the newer mechs who just arrived. Starscream continued drinking his engex and ignoring ping from Megatron before feeling a servo on his shoulder plates. Before Starscream was going to yell at the mech, he froze after turning around and seeing Optimus Prime behind him.
“Starscream..” The prime paused before continuing. “It's a surprise seeing you here, how are you and Megatron?” Starscream flinched at his ex-conjux’s name and looked down at his cube.
“Megatron and I aren’t conjuxed anymore, and to be honest with you I'm more surprised seeing the prime here than any other mech.” The seeker said with a tone trying to be smugged but failed.
Optimus took a seat next to him and placed his order before tilting his helm towards Starscream. He removed his face plating and for the first time, Starscream was stunned at how a mech could look so pretty. Prime’s lips were made of plump protoform that had a deep scar on the side of it. Starscream imagined himself ripping apart the mech who inflicted that wound on Optimus’ gorgeous lip plating but was broken out of his thoughts when the red and blue mech spoke.
“I see, I'm sorry for bringing it up,” Optimus whispered, suddenly looking down and fidgeting with his hands. “I do hope for you to have a better future.” He said trying to lighten the mood.
Starscream was still dazed at the mech before him, pretty aware that his face-platings were heating up. His body desperately wanted to turn on his fans since he was overheating, but he manually declined the procedure. Instead, he watched as Optimus took his cube from Swerve and drank it in nice low sips. Seeing the Prime drink the pink metallic liquid made Starscream want to watch Optimus drink his transflui— Wait, no! What a disgusting idea, he thought. He would never do that, especially not after catching his conjux cheating! Would he? Starscream kept watching the prime drink and the red and blue mech glanced over to see if he was watching. Noticing he was, he purposely choked on his drink, letting the engex flow freely down the corners of his mouth.
“Oh dear, sorry I didn't mean to..” He started before grabbing some napkins and started to wipe himself down with the cybertronin fiber. The Ariel bot couldn't help but look at the way the prime wiped himself down, it almost seemed, dare Starscream to say it, inviting.
“It isn’t like you to make a mess Optimus,” Starscream smirked. “What's wrong? You seemed all revved up.”
To that, Optimus smiled and looked at Starscream. He leaned in and whispered in the ex-decepticon’s audials.
*Later*
Starscream dragged the Prime to the hotel room they rented out a few blocks away from Serve’s bar, he unlocked the door and closed it before pushing Optimus against the wall. Without hurrying and wanting to savor the moment, the seeker tilted his helm and slowly nibbled on Optimus’ neck cables, causing a soft rumble that Starscream adored. He couldn't believe this was happening, a night with the ex-leader of the Autobots? He felt like he was dreaming and just to make sure he pinched the arm cables but still didn't online. He looked at the prime who looked back at him with soft blue-lit optics and he couldn’t stop his face plating from warming up. Not holding back any longer, Starscream pressed his lips harshly against Optimus’ inflicting another rev, and with that Starscream could hear his fans kicking up to full speed as he pressed deeper into the kiss. Optimus parted his lips for a quick break and the seeker took the chance to slip his tongue into the trembling mech’s intake.
“You taste delicious,” Starscream smirked pulling back a little. “You’ve been wanting this, have you? Thinking of me pushing you against the wall like this?” The jet teased, slowly lowering his hands down the Prime’s trembling back struts.
“Star..please,” Optimus started before being cut off with another harsh kiss from the impatient Starscream. He didn’t even know what he was saying ‘please’ too but he didn’t care, he just wanted Starscream.
Optimus’ crush on the aircraft started during the war when he was injured and the seeker surprisingly didn’t attack but cared for the Prime. He treated his wounds and even shared his engex ration. This was the first time Optimus Prime was cared for so tenderly, sure the Autobots were there when he needed him but none of their touch felt as tender as Starscream’s. Cycle after Cycle Optimus couldn’t stop thinking about the Ariel bot and found himself leading down a rabbit hole of self-interfacing and fantasies.
“What's wrong Optimus, having second thoughts?” Starscream questioned as he pulled back once again.
“No! I mean no, continue..” He blushed.
Starscream just nodded before slipping his other hand lower to the Prime’s interface panels, sweetly kissing his neck cables again and palming Optimus’ heated plating to coax them into opening. He heard a soft click before looking down and noticing Optimus had hurriedly opened his panels which made Starscream chuckle. He dipped a digit into the wet valve, enough to be surrounded by the plush protoform lips, but not enough to penetrate. He grinned when he felt his digit immediately being drenched in transfluid and looked up smugly at his flushed Prime.
“What a good eager mech you are, already lubricating this much.”
He purred, flashing his denta. Optimus, too embarrassed to respond just whined and looked hopefully at Starscream, he rocked his hips to get further stimulation as the seeker kept pulling his fingers out and back in, toying with his valve’s calipers. With no warning, Starscream pushed his fingers harshly into the Prime’s valve, causing him to jolt and cry out. He kept his fingers trapped by the tight protoform before moving them in and out of his soaking valve. Starscream licked his lips, before setting a much harsher pace than the first thrusts, reveling in the way the prime cried in his audials.
“S-star..wait!” Optimus whined as he could feel thrust getting harsher.
He threw his helm back when he felt Starscream adding a second digit, losing his processor to ecstasy and overwhelming pleasure. With that Optimus overloaded hard, sending him frizzing out and jolts of energy up his back struts. Starscream couldn’t help but smirk as the Prime came down from overload and slumped over him, he carried his frame to the berth and set him down gently. He looked down at his one-night stand and lowered his helm to place a small kiss on his cheek, he wished he and Optimus met before the war before all this happened. Maybe… just maybe he would've had a happy life, and he also wouldn’t have been cheated on. Starscream didn’t want to leave the prime alone, but the seeker didn’t think Optimus would want to see him once he was online. Starscream knew it was probably the high grade that caused the prime to act the way he did, and with a heavy sigh, he exited the hotel room.