The first single with an animated PV! In addition to Kasumi Nakasu's (CV: Mayu Sagara) new solo song "Mutekikyū*Believer," chosen through a user-voting general election, the release includes the 9-member song "Mirai Harmony," as well as a newly recorded drama part! The animated PV disc contains two songs: "Mutekikyū*Believer" (full size) and "Mirai Harmony" (short size)!