Shockwave was abruptly shoved into a supply closet with parts for the ship consoles clattering onto the floor as his back hit them. Starscream followed him in and sealed the door.
"Starscream, what has gotten into you?!"
"You. The arrogant, perfect Shockwave flaunting his scientific prowess and mental superiority. If Megatron actually looked into your aft kissing, maybe he would know about your little secret against him."
Shockwave warned back, "That is not relevant now. It hasn't been for eons, and I suggest you drop it lest you want me to find an excuse why our second-in-command suddenly crashed onto Earth's surface."
The Seeker sneered, "Threats are hardly meaningful here, Shockwave, or did you fail to learn that with the rest of the rules?"
"If you're angry that you've been demoted to accommodate my presence aboard this vessel then it is logical but directed at the wrong person-"
"Oh, no, I have the right person alright."
Shockwave suddenly was shoved back again and Starscream leaned in to give him a kiss below his optic which sent mixed signals to his neuronet. All he could reply with was, "What?"
Starscream shoved him again to startle him, audial fins changing from being straight up to flat against his helm in confusion. He got his reply when a servo dipped below to rub at his interface.
"Why is it you are always so perfect in what you do?" Starscream snarled low, "You can make a million mistakes and be everyone's hero, but I am always second to you. What makes you so special? What makes you so insufferably wise that they can't see your flaws but I can? That doesn't seem fair they can enjoy your lying presence, but I see the true Shockwave and he is a loyal, pathetic, charming hypocrite."
It dawned on Shockwave what Starscream was acting on. Jealousy. But not just any type. Envious denial combined with Starscream's need to be in control. Shockwave was an outlier in that, someone he couldn't threaten or override into submission. Like with Megatron, Starscream had a liking for mechs of insatiable power and it conflicted his natural tendencies to backstab and destroy rivals. Shockwave was both a threat and someone he secretly admired. He hated him but was entranced by him. Very peculiar.
Obviously, the stress of his presence had gotten to Starscream's processor amid the rant and Shockwave tried to leave but was shoved back a third time with the Seeker pressing too close for comfort. He didn't want to hurt or entice Starscream if he could avoid it, especially under these conditions.
Starscream's servo clawed at his panel as he leaned to into Shockwave's chest. Shockwave muttered, "Starscream...this is not logical."
"Why? Am I not good enough for the perfect Shockwave?"
One leg was lifted up to the side of his thigh and the scientist shuttered in arousal as Starscream rubbed his front panels against his own. Being seduced by his esteemed rival was not what he expected and the more Starscream pressed, the less control he was starting to endure himself. When Starscream nuzzled his helm with a wanton expression, it all but sealed Shockwave's response.
Shockwave didn't fight him and let him wrap his legs completely around his hips, supporting him with his cannon arm while his servo rested on his waist. Starscream was a slim build compared to himself and beautiful despite the annoyance he possessed sometimes. His chassis was perfect. When Starscream got eager, Shockwave responded by grinding his closed panel against Starscream's aft.
"Is your spike as perfect as you pretend you are?" Starscream grinned.
"Only one way to find out," Shockwave mused back.
He released the member in question and let it press against Stracream's aft as the challenge the other so craved. As soon as a valve was ready for him to take, he slipped into his rival without preparation. Starscream deserved it for playing his little games, earning Shockwave a brief cry from the grey mech. However, as he started to move, Starscream's tune changed dramatically.
"Illogical are you to blame me for your ailments," he grunted, shoving himself deep. "Illogical that you are so entitled to my glory when you earned none of it. I am not perfect, Starscream; I just know when to choose my battles wisely and when to suck up."
Starscream growled at that but matched his thrusts, "Of course, you wouldn't admit that while I was coming onto you."
"I just wanted to know how far you would take this, but it seems you want what you don't deserve. But I'll enlighten you for the sake of argument that you are a greedy, licentious attention whore."
He sometimes wanted to hurt Starscream. He was no fool in ignoring that. But it wasn't ideal to what needed to be done, and damn him for finding their hatred of one another mutually arousing. Only in his dreams did he ever think about touching Starscream this way. It was the reality coming to life how much he truly wanted it.
He pressed Starscream against the shelves to the side of the room, breaking one by accident as he drove into the desiring heat his spike demanded to claim. He refused to soften his thrusts for anything. Starscream was so much a pain in his aft that it felt right railing him with speed. The Seeker seemed to have no complaints bouncing down against him.
"Ah! AH! Shockwave! Oh, I hate you!"
"Like...mmmphhh...likewise," he huffed.
The Seeker's claws left horrid streaks down his chest that wouldn't be easy to buff out. Shockwave ignored this as his overload was rapidly approaching. He didn't care if Starscream came, but he needed his. The faint bouts of pain from the claws made him also enjoy their sting.
He got a glare from Starscream when he removed his spike before releasing transfluid, spilling all of it on the floor with a groan. But he wasn't done. No, he would show Starscream the true meaning of 'perfect.' Slamming Starscream on the ground missionary style, he crawled on top of him and escorted his aft back to his semi-solid spike.
Starscream's claws left many marks on the floor, too many to count, as Shockwave leaned over him and slammed his hips into the Seeker with straining vents. His own claws raked against the slim waist leaving small, bleeding scratches. He perched the thin legs over his shoulders to hit deep towards the gestation chamber and all the sensitive nodes along the journey.
"Shock-ah Primus!"
"Say it, say my name," Shockwave demanded, optic lit up to its brightest.
"Shock...wave!"
"And who is your superior?"
"Shockwave! You! Please," whined the Seeker before he succumbed to an overload.
The scientist trailed his second by grinding into Starscream and this time, he made sure to fill his greedy Seeker up. He caught himself from collapsing onto the smaller mech who purred and nuzzled him like he was his master. Shockwave took the affection in stride.
Suddenly, the supply closet door opened and there was Knockout and Breakdown. Breakdown politely covered his optics but Knockout only gave a chuckle. "Having fun?"
"K-Knockout," winced Starscream who was still under Shockwave with a spike deep inside him, "if you say a word..."
The medic made a zipping motion over his lips. "Wouldn't dream of it. But you, Shockwave...nice to see you aren't disabled in other places after all."
A wink threw Shockwave off, and he could tell Breakdown was trying not to think about it though a blush was present. He only peered to the side in shame. When Starscream moved, it made him flinch from how delicate his sore spike was. He didn't need to be aroused again with witnesses.
He knew Starscream blamed him, and he hated Starscream too. It was just a never-ending nuisance with this Seeker, but at least he got some of his frustrations out.
AN: This one is my least favorite. I literally did a half-ass job on it. I do that on every one honestly but this one I could not for the life of me think of anything clever, and I'm posting it now because I want to save the really good ones for later because there's some that will be worth the wait. Wheeljack is one of my favorites who might be next. Either him or Skyquake, who was another fun one to do.