Crayon Shin-chan: Fierceness That Invites Storm! The Adult Empire Strikes Back

As the 21st century approaches, a new 20th-century museum has opened in town, for the adults to relive their childhood. However, the owners of the museum seem to have other plans for it. The adults start to behave strangely, and one morning, they abandon their children for the 20th-century museum. Shinnosuke, along with his friends, must now rescue his parents and stop the world from returning to the 20th century before they get captured.

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