Phantom Boy and a Village That Doesn't Exist on a Map

Japanese Spiderman

A strange boy enters Takuya's life and claims to know his secret identity. The boy leads Spiderman to a hidden village where he pleads for help to save his sister. After encountering some hostile villagers, Spiderman discovers that this was no oridnary rescue. The boy's sister is being held captive by the Iron Cross Army!