M-01
Performer: Anzu Futaba (CV: Hiromi Igarashi), Rika Jougasaki (CV: Nozomi Yamamoto), Asuka Ninomiya (CV: Shiki Aoki), Koume Shirasaka (CV: Chiyo Ousaki), Mirei Hayasaka (CV: Ayaka Asai)
Composer: Shuhei Mutsuki
Arranger: Shuhei Mutsuki
Lyricist: Genki Mizuno
M-02
Performer: Kyoko Igarashi (CV: Atsumi Tanezaki)
Composer: Hige Driver
Arranger: Hige Driver
Lyricist: Hige Driver
M-03
Performer: Syuko Shiomi (CV: Ru Thing)
Composer: Takaaki Utsumi (TRYTONELABO)
Arranger: Takaaki Utsumi (TRYTONELABO)
Lyricist: Apis (TRYTONELABO)
Album was composed by Hige Driver / Shuhei Mutsuki / Takaaki Utsumi and was released on August 22, 2018. Soundtrack consists of 7 tracks tracks with duration over about 30 minutes. Album was released by Nippon Columbia.
CD 1
| 1 | Little Riddle (M@STER VERSION) | 04:39 | |
| 2 | Atsuatsu♪Macaroni Gratin | 04:36 | |
| 3 | Private Sign | 04:51 | |
| 4 | Little Riddle (M@STER VERSION) Original Karaoke | 04:38 | |
| 5 | Atsuatsu♪Macaroni Gratin Original Karaoke | 04:36 | |
| 6 | Private Sign Original Karaoke | 04:53 | |
| 7 | Little Riddle (GAME VERSION) | 02:06 | |
