UNDEAD are Rei Sakuma (CV: Toshiki Masuda), Kaoru Hakaze (CV: Kei Hosogai), Koga Ogami (CV: Yuki Ono), Adonis Otogari (CV: Wataru Hatano).
AKATSUKI are Keito Hasumi (CV: Yuichiro Umehara), Kuro Kiryu (CV: Shinichiro Kamio), Souma Kanzaki (CV: Keisuke Kaminaga).
M-01
Vocals: UNDEAD × AKATSUKI
Composer: Kayoko Kusano
Arranger: Kayoko Kusano, Kisida (KISIDA KYODAN & THE AKEBOSI ROCKETS)
Lyricist: Saori Kayoko Kusano
M-02
Vocals: UINDEAD
Composer: Atsuki Okuma (Arte Refact)
Arranger: Atsuki Okuma, Atsushi Harada (Arte Refact)
Lyricist: Saori Codama
M-03
Vocals: AKATSUKI
Composer: Atsuki Okuma (Arte Refact)
Arranger: Atsuki Okuma (Arte Refact)
Lyricist: Saori Codama
Album was composed by Atsuki Okuma / Atsushi Harada / Kayoko Kusano / Kisida Kyodan / Saori Codama and was released on December 09, 2021. Soundtrack consists of 6 tracks tracks with duration over . Album was released by Retorno.
CD 1
| 1 | PERFECTLY-IMPERFECT | | |
| 2 | FUSIONIC STARS!! - UNDEAD ver. - | | |
| 3 | FUSIONIC STARS!! - AKATSUKI ver. - | | |
| 4 | PERFECTLY-IMPERFECT (Instrumental) | | |
| 5 | FUSIONIC STARS!! - UNDEAD ver. - (Instrumental) | | |
| 6 | FUSIONIC STARS!! - AKATSUKI ver. - (Instrumental) | | |
