A spin-off of "Hirune Hime: Shiranai Watashi no Monogatari" (Ancien and the Magic Tablet) centering on the adventure of Ancien, a girl that keeps appearing in Kokone's dreams. The story of the dream is one that Kokone's father told her as a mysterious fairy tale when she was little. The short expands on the story from the film.

[Source: Anime News Network]

Why am I snoozing all the time?

I keep having this dream...

Kokone Morikawa lives with her father in Okayama Prefecture. She's a typical high school senior with no special talents except one: she can fall asleep anytime, anywhere. Recently she's been having a series of strange dreams. Her father Momotaro, a gruff man of few words, doesn't seem to pay much attention to his daughter; he spends most of his time repairing and modifying cars.
The year is 2020, three days before the opening of the Tokyo Olympics. Without warning, Momotaro is arrested and taken to far-off Tokyo for questioning. He's a misfit, but Kokone can't believe that he would really do anything bad. With help from college student and childhood friend Morio, Kokone is determined to make her way to Tokyo and free her father, as well as unravel the mystery of her dreams. Along the way, she discovers that those dreams are the key to facing her challenges in the real world.
Kokone uses her only talent--napping--to embark on a mysterious journey that straddles dreams and reality. And waiting for her at the end of her adventure is a small but precious truth...

[Source: NTV]