The plot centers around Mash Kyrielight and Romani Archaman's backstory, as well as the preceding occurrences leading to the Absolute Demonic Front Babylonia - the Seventh Singularity. The episode premiered on August 3, 2019 at Fate/Grand Order Fes. 2019: Chaldea Park and was downloadable on the Fate/Grand Order mobile application from August 4, 2019 to August 11, 2019.