 Dolly was formed in 2005 with an original lineup of Mitsu, Masa, Yuina, Hachi and Takashi Oshoudani as a support member.They had their first live performance in October 2005. at Takadanobaba Area and released their first single, "Screen of Indoors" shortly after as a DVD single.In 2006, their first CD single, "Pumpkin Carriage Parade", was released on January 13.