Iason Mink, a high-class 'Blondie' from the capital Tanagura, runs into Riki, a black-haired 'Mongrel' from the slums, and makes him his 'Pet', which Riki resents being. This futuristic tale is set in a world ruled by a super computer Jupiter, where its android creations, the Elites, are assigned various social classes based on their hair color. Originally serialized in the yaoi magazine Shōsetsu June between December 1986 and October 1987, the story was collected into a hardbound novel that was released in Japan in 1990. 'The Space Between') is a Japanese novel written by Rieko Yoshihara.