Not a Cry You Can Hear at Night (слэш)

How could he not remember this? Steve wracked through his brain to try to gather any recollection of wailing on Tony, but couldn’t find it. The Steve on screen seemed to be on autopilot. There was no planning in punches; he was letting the furor of battle take over. It could have been any of the countless villains he’d pummeled. But it wasn’t. It was Tony. It was the love of his life. And in that moment, he couldn’t realize that because there was a thin sheet of metal between them, obscuring Tony’s face. Tony hadn’t had that luxury, that barrier of disillusionment to whom he was fighting. Instead, it was just Steve’s fists in his face, in his chest, over and over. If only he could blame the echo of the bunker or the quality of the video.
-or-
Steve finds the footage the Iron Man helmet recorded of the fight in Siberia.