A fifth version of the "DP Concept" made its debut on 1 October 2006 in a 26-week radio series on FM Osaka, entitled "Lovely Angel: Kei & Yuri". A streaming Internet broadcast of successive episodes became available beginning 15 October. The story involves a case in which the Lovely Angels assist the FBI on a case which takes them along the route of the old Route 66. The series features Horie Yui as Yuri and Minagawa Junko as Kei. While Takachiho participated in the selection of the voice artists, he was not involved in the writing for this series. (Additional information on the series, in Japanese, can be found at Nihon Sunrise's site.
