*CAUTION: POST CONTAINS SPOILERS*
The code for the keypad in the bathroom of the diner is 0311.
There are many codes written all over the wall but this one is not easily noticed. The one hint you get is that the mirrors aren't reflecting anything.
Eve and her comrades land on the surface to reclaim the extinct Earth and cross paths with a survivor named Adam. Eve is then led by Adam to the last surviving city, Xion, where she meets the elder of the town Orcal and is told many stories. In order to serve her mission to save Earth, Eve develops close relationships…