Cleasky are Elena Shimabara (CV. Asuka Kakumoto), Miya Miyao (CV. Choucho Kiritani)
M-02
Composer: Kyo Takada
Arranger: Kyo Takada
Lyricist: KOH
M-06
Composer: Yuki Honda (Arte Refact)
Arranger: Yuki Honda (Arte Refact)
Lyricist: KOH
Album was composed by Kyo Takada / Yuki Honda and was released on March 28, 2018. Soundtrack consists of 7 tracks tracks with duration over more than hour. Album was released by Lantis.
CD 1
| 1 | Drama "Niji-iro letters"/"Crank In! ~Satsuei Mae no Hitotoki~" | 05:17 | |
| 2 | Niji-iro letters | 05:05 | |
| 3 | Drama "Niji-iro letters"/"Tenkousei" | 08:40 | |
| 4 | Drama "Niji-iro letters"/"Sora to Lens" | 15:14 | |
| 5 | Drama "Niji-iro letters"/"Yakikake Film" | 18:41 | |
| 6 | Omoide wa Clear Sky | 04:10 | |
| 7 | Drama "Niji-iro letters"/"Crank Up! ~Satsuei Ato no Hitotoki~" | 04:04 | |
