Throughout the duration of the production, JAM Project bandmate Masami Okui supplied back-up vocals and harmonization in many of the tracks on the album.
Masami Teraoka | Masami Tsuchiya | Masami Yuki | Masami Shinoda | Devil Masami | Masami Tsuruoka | Masami Okui | Masami Nagasawa | Masami Kurumada | Masami Hirosaka | Masami |