What is it?
The 1985 Japanese OVA (original video animation) movie Angel’s Egg.
What is it about?
This is how Rotten Tomatoes describes this OVA (original video animation) movie:
An unnamed young girl, carrying a large egg, wanders about a surreal, nightmarish post-apocalyptic world collecting water in glass bottles.
A man (also nameless), carrying a cross over his shoulder, crosses her path, and begins to follow her around during her daily routine.
Despite her worries for her beloved egg (the contents of which she refuses to tell him), she eventually grows to trust him, even though his intentions remain mysterious.