This is the story that always appears in the dreams of Kokone, who eventually becomes a high school student. What is the secret hidden in the fairy tale that Kokoneheard as a young boy? And then, what is this secret entrusted to his father Momotaro's mind? This movie depicts the adventures of the main character, high school student Morikawa Kokone, who appears in the dreams of another main character, Yasue, another nap princess.
Unfortunately the movie Ancien and the Magic Tablet is not yet available on HBO Max.
| Sound | Yoko Shinomura | Original Music Composer |
| Art | Takashi Sano | Storyboard Artist |
| Production | Taiki Sakurai | Producer |
| Writing | Kenji Kamiyama | Original Story |
| Writing | Harumi Doki | Writer |
| Directing | Kenji Kamiyama | Director |
