As of June 27, cast members Satomi Ishihara (Hans), Nanami Sakuraba (Sasha), Shu Watanabe (Fukushi), Rina Takeda (Lil), and Kamio Yu (Yunohira) have been confirmed to appear in the series; along with Yuta Hiraoka as an original character for the web drama, Izuru. "Hangeki no Yaiba" (Counter Blade), performed by Japanese rock band Wagakki Band, was revealed as the theme song for the series, and it will be included in the band's upcoming 2nd full album "Yasou Emaki" to be released on September 2.[3][4]