"You didn't even recognize me, Barnes."
"Except I did, Nat. Of my time under Hydra, you were the only good."
(Movies and comics will be noticed, but disregarding IW)
When Bucky joins the Avengers, he meets the reader, only to find out that they aren't strangers at all and that they share a past that neither of them remember.
Cover art by @AC_A99