Life in Tokoyomi Village is quiet and peaceful. Yet the tiny village has a single restriction in place: no one may cross into the secluded Sealed Forest until the coming-of-age ceremony when they're officially recognized as an adult. If you enter the Sealed Forest as a child, Lady Chiyo will come to take you away. You've never broken the restriction despite your dreams of adventure. On the day of your friend Hayato's coming-of-age ceremony, however, you and your friends follow him into the Sealed Forest and find yourselves trapped in a world of eternal twilight, where shadow children play amidst dark trees and the ghost of Lady Chiyo stalks your every move. Will you escape the Twilight World?