"Prequel" . "Set about twelve years before the events of the original OVA" . "prelude" . "Prequel" . "crowdfunding" . "prequel game" . "prequel comic" . "taking place 10\u201315 years before it" . "taking place" . "background story" . . "prequel" . "prequel film" . . . . . . "takes place a little while before them" . "Prequels years" . "premake" .