Bucky and Steve's Excellent Adventure (слэш)

Six months ago, Steve set out on a final mission to return the infinity stones to their proper timelines, and returned a minute later having lived out a life of peace and contentment with Peggy Carter in the past. He died in his sleep a few days later, surrounded by his friends. Or so Bucky assumes. He wouldn't know, he'd been busy being locked up on the Raft while the government decided whether or not to pardon him for the whole Winter Soldier thing.
What with the court-mandated therapy and the constant surveillance by alphabet agencies and the crushing weight of his past, he's not sure if giving him a chance at "normal life" is more cruel than the alternative. But he's doing fine. Great, actually, so don't ask. He didn't have a nightmare. Especially not that strangely disturbing one about Steve...
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AKA I wanted to write the reverse time-heist and I'm still salty about Endgame. This is the result.