Sister Princess
The program began as a tie-up with a radio program which had been previously broadcast for "Sister Princess" called "Sister Princess: Onii-chan to Issho", and the same personalities for that program, Natsuko Kuwatani and Hisayo Mochizuki, were used starting with the fifteenth broadcast on January 19, 2003. Two others who were cast in the "Sister Princess" anime series, Yumiko Kobayashi and Nana Mizuki of the unit Prits, also made regular appearances on the program. An audition was held for to create a protegee group for Prits known as Puppy's which consisted of Yasuko Itō, Shizuka Hasegawa and Ai Matayoshi; the members in Puppy's were also regular members to "Dengeki G's Radio".