The "Secret Collection" exists in a legal and ethical gray area. Rights holders (such as ASCII Media Works and the original animation studio) have never officially endorsed the archival project. However, due to the Jinki IP being largely dormant for over a decade, no cease-and-desist orders have been issued.
These illustrations were eventually compiled into this limited "Secret" edition. True to its name, it contains more "provocative" and experimental artwork of the series' heroines, like Akao Hiiragi, that was considered too intense for standard magazine publication. Why is it so rare? jinki gals secret collection