Cybele Henshuubu or シベール was a series of ten manga doujins published from 1979 onward which parodies anime/manga/novels of their time as well as having original stories.

They featured erotic bishojo and both bestiality with animals as well as anthropomorphic animals were recurring themes.

Research on circle+magazine is at https://forums.e-hentai.org/index.php?act=ST&f=13&t=221062