Wonderful, Complicated (слэш)

"He almost lost Tony today. Tony almost died because he wasn’t fast enough, wasn’t smart enough, couldn’t come up with a better plan, was incompetent as a leader. It's like Bucky all over again, and isn't that absolutely terrifying, that Tony is as important to him as Bucky? Tony, the genius billionaire playboy philanthropist he’s known for only a couple of years, who he’s really only gotten to know recently, has squeezed his way into Steve’s heart, right next to his oldest friend. And wouldn't that be the stuff of nightmares, if Steve failed to save him, too."