Patema Inverted: Beginning of the Day is a special anime that premiered in winter 2012, produced by Purple Cow Studio Japan.

About the production: there are 4 episodes of about 6 minutes and its current status is "finished".

Its main genres are sci-fi, with themes such as Dystopian.

On AniList, Patema Inverted: Beginning of the Day has an average score of 70%, a good score, and appears on 9,448 users' lists.

The franchise continues in or follows from: Sakasama no Patema.

This is an online distribution of the prologue of the movie, illustrating the first day of the entire story. A world, forever beyond your expectations. In a dark, cramped, underground world of endless tunnels and shafts, people wear protective suits and live out their modest yet happy lives. The princess of the underground community, Patema, goes out exploring as always, inspired by her curiosity of the unknown depths of the world. Her favorite spot is the "danger zone", an area forbidden by the "rule" of the community. Despite being frequently chastised by her caretaker Jii, she cannot hold back her curiosity for the reason behind the rule, because no one would tell her what the "danger" was. When she approaches the hidden "secret", the story begins. (Source: translation of a synopsis from the nicovideo news)

Official synopsis from AniList.