Tony and Bucky know each other and are friends - maybe lovers. I can't remember if this story is gen, pre-slash or slash.
Bucky is not part of the team and everyone is wary of him when he steps out of the shadows to help in this particular battle.
Tony has to step out of the suit to disarm a bomb on a rooftop.
Not much but I'm hoping someone will recognize it. Thanks for any help!