Since 2011, the way this content is consumed has shifted from physical DVDs and .avi files to digital streaming and high-definition formats. Older titles like this one are often archived by collectors of "vintage" digital content from the early 2010s.
: This is a production catalog number or release code. In Japanese home video markets (including adult video or gravure idol media), every release is assigned a specific alphanumeric code to help distributors, retailers, and consumers locate the exact title.