G-Taste.

G-Taste is a Japanese erotic manga series written and illustrated by Hiroki Yagami and serialized in Kodansha's Mr. Magazine from 1996 to 2000, before being moved to Young Magazine Uppers from 2000 to 2004. The "G" in "G-taste" is used symbolically as the letter between "F" (for "Fetish") and "H" (for "hentai").