Episode 1
Promare theatergoers received, as a bonus, character cards with serial codes that granted access to the advanced streaming of a prequel anime. The events in this prequel take place one day before the events of Promare. (Source: Anime News Network)
EP 1 - Episode 1

2019
Promare: Galo
Promare theatergoers received, as a bonus, character cards with serial codes that granted access to the advanced streaming of a prequel anime. The events in this prequel take place one day before the events of Promare.
(Source: Anime News Network)