I’d like an AU where Steve travels back in time and meets a young!Tony who’s in his early twenties. He’s currently married to Tony in the future and he’s so surprised to be here with the younger version of his husband. They somehow end up meeting and Tony freaks out because oh my god, it’s actually Captain America. Steve has to pretend like he’s never met Tony in his life and the two of them steadily begin to become friends which blossoms into something more.
Cue Steve having wild adventures with a young!Tony which is filled with arguments, lots of alcohol, traveling and a ton of self-realization.
When Steve gets back into his timeline, time has barely passed and he’s been gone for an hour or so when he’s been there for years.
Tony walks into the workshop, startles a bit at the sight of Steve before smiling in relief at that fact he’s back, having noticed he had gone. He then brings up a memory they made together when Tony was just twenty five. It’s a good memory, a fond one where they went to the beach and spent the whole day there, laughing and building castles while getting sunburned.
Steve smiles back, glad to have been a part of Tony’s life then as he is now.