The original cartoon of the same name from Kui Kui was adapted by Ghibli into an animated film. This film adds a follow-up original plot to the original work. Although the film is an original story, it faithfully reproduces the world view of the original work. It tells the story in the original work that, over the past 10 years, it has become the "hero" and "holy division" of adults. Over the past 10 years, Kui, who dreams of becoming a novelist, has become a children's novel editor of the publishing house. She has given up her dream and Seiji Matsuzaka (Tauri Matsuzaka), who continues to pursue her dream overseas, began to drift away. "she began to try to find the original intention that the two encouraged each other and moved forward together.