Part of You

"I need Steve," Bucky said finally, eyes far off as he thought about the little kid from Brooklyn. Tony looked up from his work, squinting behind his frames. Bucky stared back unabashedly. "I need Steve," he repeated, "More than I need an arm. I don't even want an arm if it means Steve could get hurt." Post CAWS. Steve/Bucky established, Bucky/Tony Stark friendship