Kana Asumi
The background music of the series was composed and arranged by Keiichi Okabe, Keiichi Hirokawa, Hidekazu Tanaka, Kuniyuki Takahashi and Keigo Hoashi of the group Monaca. Three pieces of theme music are used for the first season: one opening theme and two ending themes. The opening theme is "Someone Else" performed by Kana Asumi, Saki Fujita and Eri Kitamura, while the main ending theme is performed by Jun Fukuyama, Daisuke Ono and Hiroshi Kamiya. The ending theme for episode nine is , also performed by Fujita. For the second season, the opening theme is "Coolish Walk", again performed by Asumi, Fujita and Kitamura, while the ending theme is , also performed by Fukuyama, Ono and Kamiya. For the third and final season, the opening theme is "Now!!! Gamble", once again performed by Asumi, Fujita and Kitamura, while the ending theme is , once again performed by Fukuyama, Ono and Kamiya.