For Steve, the serum was both a gift and a curse
set in the distant future where Steve is one of the handful of first generation Avengers alive. He succumbs to his loneliness and buys a companion OS who fashions itself into someone very familiar.
in other words a Stevetony Her AU
(that ive been working on since AI Tony was anounced lmao just pretend that sophisticated AIs arent a thing in 616 OR they’ve recently just been opened to the market and back then its just tony who has the capabilites to have AI)