Futabu! Wikia

Welcome to the Futabu Wiki Futabu is an adult doujin series created by BOSSHI. Which later spawned a hentai series. It follows Akane Niimura, a normal girl, whose curiosity has lead her to join the Futa Club as someone in charge of "service duties." Thus begins her daily happenings with the four futanari within the club. (Source: BakaBT)