Scandal is an all-female Japanese rock band formed in Osaka in 2006. Although all four members have provided lead vocals, their primary roles are Haruna on vocals and rhythm guitar, Mami on lead guitar, Tomomi on bass guitar, and Rina on drums. With numerous overseas performances and anime theme songs, Scandal has built a considerable international fanbase. The band has been voted by fans across the world into the top ten of the "Most-Requested Artists" category of the J-Melo Awards every year since 2010, taking first place in 2014.

Mami is a Japanese musician, singer and songwriter. She is best known as lead guitarist of the all-female rock band Scandal since 2006. In addition to being a principal songwriter in the band, Mami occasionally sings lead vocals on songs such as "Koe" and "Oh! No!". In 2014, Mami and two of her bandmates became the first female Japanese musicians to have signature model guitars with Fender.