No Time Between Us (слэш)

Tony Stark slipped through time when he fell from the portal above New York but waking up with Hulk roaring at him and Steve staring down at him means that he was only gone a moment, that every second of those two years away lasted no longer than a breath in present time.
Tony tries to convince himself that it was all a dream, but there’s a picture of he and Bucky that shouldn’t exist, and Steve keeps offering him Rocky Road ice cream and Tony might go crazy trying to figure it all out.
Drawn together by a now-shared past, Steve and Tony rekindle their friendship and spark something new and Tony's nightmares and anxiety start to ease.
Then word comes of the Winter Soldier, and during a fight on a bridge a mask comes off, a question is asked, and the words "Who the hell is Bucky?" send Tony's world crashing down all over again.
How do they move on from here when Bucky doesn’t recognize them and Steve is uncovering secrets that might ruin things forever?