: This could be a series or collection identifier, possibly related to a distributor or producer code.

: This part likely refers to a person, possibly an actress or a voice actress involved in the content.

The title represents a specific intersection of digital media archiving and the world of niche Japanese physical performance art. To understand this "piece" of digital history, one has to look at the three distinct elements that make up the filename: the performer, the series, and the specific digital format. The Performer: Aya Fujii

Let’s break down every component.