Total Systems Failure {Steve x Tony}

His heart aches. It's a terrible, torturous pain. His brain throbs. He closes his eyes. His brows scrunch. He's trying to remember the last time he felt this much suffering, but he knows he hasn't. Not even the shrapnel in his chest could cause this much agony. Not even when he was dying of blood poisoning. Not even when that beautifully crafted vibranium shield made contact with his arc reactor.

{Note; Yes, I am aware that Tony didn't have his arc reactor during/after Civil War, but I adore that feature about him and I'm not ready to let it go just yet. So bear with me. Also, this is just a temporary desc. until I can come up with a proper one.}