" refers to a specific digital archive of a Japanese doujinshi (self-published) work released at Comiket 80 (C80) in August 2011.
The "original.zip" suffix in your query suggests a often found on archival or file-sharing sites. If you are looking for this specific work, it is widely indexed under the artist name Kakugari Kyoudai . To help you further, c80 niku ringo kakugari kyoudai nippon h island originalzip
Conclusion
: The mention of multiple circles (Niku Ringo and Kakugari Kyoudai) suggests a "split" album or a collaborative effort, which is a staple of Comiket culture where artists share booth space. Preservation and Legacy " refers to a specific digital archive of