Hello, Happy World! is Kokoro Tsurumaki (CAST: Miku Ito), Kaoru Seta (CAST: Azusa Tadokoro), Hagumi Kitazawa (CAST: Yuuri Yoshida), Kanon Matsubara (CAST: Moe Toyota), Michelle (CAST: Tomoyo Kurosawa)
M-01
Composer: Hitoshi Fujima (Elements Garden)
Arranger: Hitoshi Fujima (Elements Garden)
Lyricist: Asuka Oda (Elements Garden)
M-02
Composer: Hitoshi Fujima (Elements Garden)
Arranger: Hitoshi Fujima (Elements Garden)
Lyricist: Asuka Oda (Elements Garden)
M-03
Composer: Ryota Suemasu (Elements Garden)
Arranger: Ryota Suemasu (Elements Garden)
Lyricist: Asuka Oda (Elements Garden)
Album was composed by Hitoshi Fujima / Ryota Suemasu and was released on February 14, 2018. Soundtrack consists of 6 tracks tracks with duration over . Album was released by Bushiroad Music.
CD 1
| 1 | Gouka! Goukai!? Phantom Thief! | | |
| 2 | YAPPY! SCHOOL CARNIVAL☆彡 | | |
| 3 | Sekai Nobbinobi Treasure! | | |
| 4 | Gouka! Goukai!? Phantom Thief! -instrumental- | | |
| 5 | YAPPY! SCHOOL CARNIVAL☆彡 -instrumental- | | |
| 6 | Sekai Nobbinobi Treasure! -instrumental- | | |
