Crayon Shin-chan Movie 09: Arashi wo Yobu Mouretsu! Otona Teikoku no Gyakushuu

As the new millennium nears, a museum dedicated to the 20th century opens, promising adults a trip down memory lane. The museum quickly gains popularity, but its influence causes the adults to behave strangely. One morning, the adults inexplicably abandon their children and flock to the museum, seemingly entranced. Shinnosuke, along with his friends, realizes something is amiss and embarks on a mission to rescue his parents. They must uncover the museum's true intentions and prevent the world from being forced back into the 20th century. The film explores themes of nostalgia, the responsibilities of adulthood, and the importance of family.