Going Steady aka Lemon Popsicle 2 is the sequel to the 1978 Israeli film Lemon Popsicle. The movie basically follows the daily lives of several teenagers as they are "coming of age" in what appears to be the late 50's (maybe early 60's).
During the World War II, the prisoners of a German camp in a greek island are trying to escape. They don't want only their freedom, but they also seek for an ineffable treasure hidden in a monastery at the top of the island's mountain.
In the future, one can achieve immortality by obtaining a mechanized body. Orphaned, young Tetsuro hitches a ride on the space train Galaxy Express 999 in the hope of obtaining a cyborg body to avenge his mother's death.